Epidemiology and Health

Most-read articles are from the articles published in 2021 during the last three month.

Original Articles

A hypertension risk score for adults: a population-based cross-sectional study from the Dubai Household Survey 2019: Ibrahim Mahmoud, Nabil Sulaiman, Amal Hussein, Heba Mamdouh, Wafa K. AL Nakhi, Hamid Y. Hussain, Gamal M. Ibrahim; Epidemiol Health. 2021;43:e2021064. Published online September 8, 2021; DOI: https://doi.org/10.4178/epih.e2021064

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Abstract PDF: Abstract
OBJECTIVES
The aim of this study was to develop a risk score model for predicting hypertension specific to the population of Dubai in the United Arab Emirates (UAE) to facilitate prevention and early intervention.
METHODS
A retrospective analysis of data from the Dubai Household Health Survey 2019 was conducted. Demographic and physical parameters, as well as blood glucose levels, were included in the data. The risk factors for hypertension were identified using bivariate analysis. A risk score model was developed using the enter method, where all significant predictors of hypertension in bivariate analyses were entered in a single step with the primary outcome of hypertension status (yes/no). The model was validated internally by splitting the data into Emirati and non-Emirati populations.
RESULTS
A total of 2,533 subjects were studied. The significant risk factors for hypertension identified were male sex, older age (≥40 years), education level, body mass index, diabetes mellitus, and dyslipidaemia. The model showed a high discrimination ability between individuals with and without hypertension, with an area under the curve of 0.77 (95% confidence interval [CI], 0.75 to 0.79), excellent sensitivity (81.0%; 95% CI, 71.9 to 88.2) and moderate specificity (56.0%; 95% CI, 45.7 to 65.9).
CONCLUSIONS
The model developed by this study is simple, convenient, and based on readily available demographic and medical characteristics. This risk score model could support initial hypertension screening and provide an effective tool for targeted lifestyle counselling and prevention programs.; Summary

Korean summary

Key Message
To prevent hypertension in Dubai's adult population, primary health care physicians can use our risk score model to recommend preventative measures, with a focus on men over 40 years old, with a low educational level, who are obese, and who have other morbidities, such as diabetes mellitus and dyslipidemia.

Trends and disparities in avoidable, treatable, and preventable mortalities in South Korea, 2001-2020: comparison of capital and non-capital areas: Sang Jun Eun; Epidemiol Health. 2022;44:e2022067. Published online August 16, 2022; DOI: https://doi.org/10.4178/epih.e2022067

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Abstract

OBJECTIVES
This study aimed to describe the regional avoidable mortality trends in Korea and examine the trends in avoidable mortality disparities between the Seoul Capital Area and non-Seoul-Capital areas, thereby exploring the underlying reasons for the trend changes.

METHODS

Age-standardized mortality rates from avoidable causes between 2001-2020 were calculated by region. Regional disparities in avoidable mortality were quantified on both absolute and relative scales. Trends and disparities in avoidable mortality were analyzed using joinpoint regression models.

RESULTS

Avoidable, treatable, and preventable mortalities in Korea decreased at different rates over time by region. The largest decreases were in the non-Seoul-Capital non-metropolitan area for avoidable and preventable mortality rates and the non-Seoul- Capital metropolitan area for treatable mortality rates, despite the largest decline being in the Seoul Capital Area prior to around 2009. Absolute and relative regional disparities in avoidable and preventable mortalities generally decreased. Relative disparities in treatable mortality between areas widened. Regional disparities in all types of mortalities tended to improve after around 2009, especially among males. In females, disparities in avoidable, treatable, and preventable mortalities between areas improved less or even worsened.

CONCLUSIONS

Trends and disparities in avoidable mortality across areas in Korea seem to have varied under the influence of diverse social changes. Enhancing health services to underserved areas and strengthening gender-oriented policies are needed to reduce regional disparities in avoidable mortality.

Summary

Korean summary
2001년부터 2020년까지 회피가능, 예방가능 사망률의 수도권과 비수도권 대도시, 비수도권 비대도시 지역 간 절대적, 상대적 격차는 대체로 감소했지만, 치료가능 사망률의 상대적 격차는 커졌다. 회피가능, 치료가능, 예방가능 사망률의 지역 간 격차는 2009년경 이후에 특히 남성에서 개선됐지만, 여성의 경우 덜 개선되거나 오히려 악화되기도 했다.

Key Message
Regional disparities in avoidable, treatable, and preventable mortalities tended to improve after around 2009, especially among males, but, in females, disparities in all types of mortalities between areas improved less or even worsened.

Citations

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Regional Health Disparities in Hypertension-Related Hospitalization of Hypertensive Patients: A Nationwide Population-Based Nested Case-Control Study
Woo-Ri Lee, Jun Hyuk Koo, Ji Yun Jeong, Min Su Kim, Ki-Bong Yoo
International Journal of Public Health.2023;[Epub] CrossRef

Methods

Meta-analysis of diagnostic test accuracy studies with multiple thresholds for data integration: Sung Ryul Shim; Epidemiol Health. 2022;44:e2022083. Published online September 28, 2022; DOI: https://doi.org/10.4178/epih.e2022083

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
The objective of this study is to introduce methods to use all of the information without omission when individual studies provide multiple effect sizes according to multiple cut-off values (thresholds) during diagnostic test accuracy (DTA) for data integration. For diagnostic test meta-analysis, a general performance method for synthesizing data according to one cut value in one study and a performance method for synthesizing data according to two or more cut values in one study were compared and analyzed.
METHODS
As sample data for meta-analysis of DTA studies, 13 DTA studies on prostate cancer (34 effect sizes including total cut-offs) were collected. The summary statistics were calculated and the summary line was analyzed using the “meta”, “mada”, and “diagmeta” packagesof the R software.
RESULTS
The summary statistics of the random effect model univariate analysis of the “meta” package with a single cut-off corresponding to the highest Youden index in a single study and those of the bivariate analysis of the “mada” package were highly similar. However, in the bivariate analysis of the “diagmeta” package including all cut-off values, the sensitivity decreased and the specificity increased as the amount of data increased.
CONCLUSIONS
Considering the heterogeneity of the summary receiver op erating characteristic curve and the use of all given cut-offs, the use of the bivariate analysis model of the “diagmeta” package is recommended. This study focused on practical methods of DTA rather than theoretical concepts for use by researchers whose fields of study are non-statistics related. By performing this study, we hope that many researchers will use R software to determine the DTA more easily, and that there will be greater interest in related research.; Summary

Korean summary
본 연구는 진단검사 메타분석시 개별 대상연구가 다수의 기준치 (cut-off value, threshold)에 따른 여러 개의 효과크기를 제공하고 있을 때, 정보의 누락없이 이를 모두 사용하는 방법과 더불어 기존의 수행방법도 비교 분석하였기에 연구에 적합한 모델 선택에 도움이 될 것이다.

Key Message
The objective of this study is to introduce methods to use all of the information without omission when indi¬vidual studies provide multiple effect sizes according to multiple cut-off values (thresholds) during diagnostic test accuracy (DTA) for data integration.

COVID-19: Original Article

The impact of COVID-19 on screening for colorectal, gastric, breast, and cervical cancer in Korea: Hyeree Park, Seung Hee Seo, Jong Heon Park, Shin Hye Yoo, Bhumsuk Keam, Aesun Shin; Epidemiol Health. 2022;44:e2022053. Published online June 21, 2022; DOI: https://doi.org/10.4178/epih.e2022053

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
The coronavirus disease 2019 (COVID-19) pandemic has affected the utilization of healthcare services, including participation in cancer screening programs. We compared cancer screening participation rates for colorectal, gastric, breast, and cervical cancers among participants in the National Cancer Screening Program (NCSP) in 2019 and 2020 to address the potential distraction effect of COVID-19 on cancer screening.

METHODS

Data from the NCSP for 4 cancer types (stomach, colorectal, breast, and cervical) in 2019 and 2020 were used to calculate cancer screening participation rates by calendar month, gender, age group, and geographical region. Monthly participation rates were analyzed per 1,000 eligible individuals.

RESULTS

The screening participation rate decreased in 2020 compared to 2019 for all 4 cancers: colorectal (40.5 vs. 35.3%), gastric (61.9 vs. 54.6%), breast (63.8 vs. 55.8%), and cervical (57.8 vs. 52.2%) cancers. Following 2 major COVID-19 waves in March and December 2020, the participation rates in the 4 types of cancer screening dropped compared with those in 2019. The highest decline was observed in the elderly population aged 80 years and older (percentage change: -21% for colorectal cancer; -20% for gastric cancer; -26% for breast cancer; -20% for cervical cancer).

CONCLUSIONS

After the 2 major COVID-19 waves, the screening participation rate for 4 types of cancer declined compared with 2019. Further studies are needed to identify the indirect effects of the COVID-19 pandemic on cancer patients, such as delayed diagnoses of cancer or excess cancer deaths.

Summary

Korean summary
본 연구는 코로나 대유행 기간 전과 후 대장암, 위암, 유방암, 자궁경부암 검진 수검률 차이를 비교하고자 하였다. 첫 코로나 확진자가 발생한 2020년을 코로나 대유행 기간, 전년도 기간인 2019년을 코로나 대유행 전 기간으로 설정하며 국민건강보험공단에서 집계된 전수자료를 이용하여 암 검진 대상자 수와 수검자 수를 비교 분석하였다. 4개 암종 모두에서 2019년도와 비교하여 2020년도에 전국적으로 수검률이 감소하는 경향이 있었으며, 1차 대유행이 있었던 3월과 3차 대유행 시기인 12월에 2019년도 동기간과 비교하여 수검률이 크게 감소하였고, 80대 이상 노인 인구에서 감소폭이 다른 연령대와 비교하여 크게 나타났다.

Key Message
We found decline of the colorectal, gastric, breast and cervical cancer screening participation rates in 2020 following the two major COVID-19 waves, compared with those of 2019, and the highest decline was observed in the elderly population aged 80 years and older.

Citations

Citations to this article as recorded by

Impact of the COVID-19 Pandemic on Gastric Cancer Screening in South Korea: Results From the Korean National Cancer Screening Survey (2017–2021)
Kyeongmin Lee, Mina Suh, Jae Kwan Jun, Kui Son Choi
Journal of Gastric Cancer.2022; 22(4): 297. CrossRef
Impact of frailty on survival and readmission in patients with gastric cancer undergoing gastrectomy: A meta-analysis
Xiaoyan Wang, Yimeng Sun, Pei Wang, Yu Jie, Guodong Liu, Dandan Gong, Yu Fan
Frontiers in Oncology.2022;[Epub] CrossRef

COVID-19: Original Article

Predictors of COVID-19 booster vaccine hesitancy among fully vaccinated adults in Korea: a nationwide cross-sectional survey: Yunha Noh, Ju Hwan Kim, Dongwon Yoon, Young June Choe, Seung-Ah Choe, Jaehun Jung, Sang-Won Lee, Ju-Young Shin; Epidemiol Health. 2022;44:e2022061. Published online July 22, 2022; DOI: https://doi.org/10.4178/epih.e2022061

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
This study explored predictors of coronavirus disease 2019 (COVID-19) booster hesitancy among fully vaccinated young adults and parental COVID-19 vaccine hesitancy for their children.
METHODS
This cross-sectional study administered an online survey from December 2 to December 20, 2021. We enrolled participants aged 18-49 years, for whom ≥2 weeks had passed after their initial COVID-19 vaccination. We estimated odds ratios (ORs) with 95% confidence intervals (CIs) using multivariate logistic regression to evaluate factors associated with booster/vaccine hesitancy.
RESULTS
Among the 2,993 participants, 48.8% showed hesitancy (wait and see: 40.2%; definitely not: 8.7%). Booster hesitancy was more common among women (OR, 1.25; 95% CI, 1.05 to 1.50), younger people (OR, 1.44; 95% CI, 1.17 to 1.77), those with a lower education level (OR, 2.05; 95% CI, 1.10 to 3.82), those who received the mRNA-1273 vaccine type (OR, 2.01; 95% CI, 1.65 to 2.45), and those who experienced serious adverse events following previous COVID-19 vaccination (OR, 2.03; 95% CI, 1.47 to 2.80). The main reasons for booster hesitancy were concerns about safety (54.1%) and doubts about efficacy (29.8%). Among the 1,020 respondents with children aged <18 years, 65.8% were hesitant to vaccinate their children against COVID-19; hesitancy was associated with younger parental age, education level, the type of vaccine the parent received, and a history of COVID-19 infection.
CONCLUSIONS
Concerns about the efficacy and safety of COVID-19 vaccines were the major barrier to booster acceptance. The initial COVID-19 vaccine type (mRNA-1273), young age, gender (women), a low education level, and adverse events after the first COVID-19 vaccine were key predictors of booster hesitancy.; Summary

Korean summary
본 연구는 국내 19-49세 성인을 대상으로, 코로나19 3차접종 의향과 그들의 18세 미만 자녀에 대한 코로나19 기초접종 의향을 조사하고, 코로나19 백신접종 기피와 관련된 요인을 파악하고자 하였다. 2021년 12월 2일부터 20일까지 온라인 설문조사를 통하여 자료를 수집하였으며, 연구대상자는 코로나19 기초접종을 완료한 후 2주 경과한 19-49세 성인으로, 전국 대표성을 확보하기 위해 성별, 연령, 지역별로 층화하여 모집하였다. 코로나19 3차접종 기피율은 약 48.8%로 나타났으며, 접종 기피 관련 영향요인으로는 젊은 연령층, 여성, 낮은 교육수준, 기초접종 백신 종류, 기초접종 후 중증 이상반응 경험이 포함되었으며, 18세 미만 자녀에 대한 코로나19 기초접종 기피율은 65.8%로, 관련 영향요인으로는 젊은 부모 연령, 교육수준, 부모의 기초접종 백신 종류, 코로나19 감염 과거력이 포함되었다.

Key Message
Concerns about the safety and efficacy of COVID-19 vaccines were the major barrier to booster acceptance; the initial COVID-19 vaccine type (mRNA-1273), younger age, gender (women), a low education level, and adverse events after the first COVID-19 vaccine were key predictors of booster hesitancy.

Methods

Korea National Health and Nutrition Examination Survey, 20th anniversary: accomplishments and future directions: Kyungwon Oh, Yoonjung Kim, Sanghui Kweon, Soyeon Kim, Sungha Yun, Suyeon Park, Yeon-Kyeng Lee, Youngtaek Kim, Ok Park, Eun Kyeong Jeong; Epidemiol Health. 2021;43:e2021025. Published online April 19, 2021; DOI: https://doi.org/10.4178/epih.e2021025

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23 Citations

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Abstract

The Korea National Health and Nutrition Examination Survey (KNHANES) was initiated in 1998 to provide evidence for the development and evaluation of health policies and programs. The Korea Disease Control and Prevention Agency is responsible for the KNHANES and has conducted it as a series of surveys. Over the past 20 years, efforts to produce accurate, timely, and nationwide health statistics have been refined by establishing a continuous annual survey system with full-time field staff, incrementally expanding survey components, collaborating with relevant academic societies for quality control, and revising the survey methods. Additionally, the utility of the collected data was increased by linking the KNHANES data with related data from other government agencies or institutions and making the overall data publicly available on the official website of KNHANES (https://knhanes.kdca.go.kr). Additional long-term plans are being developed, including plans to continue producing nationwide health indicators and invigorating the utilization of the KNHANES data.

Summary

Korean summary
국민건강영양조사는 국민건강증진법제16조에 근거하여 1998년부터 우리 국민의 건강수준, 건강행태, 식품 및 영양소 섭취 실태에 대한 국가단위 통계를 산출하는 조사사업이다. 본 연구에서는 건강지표 생산 확대, 조사 자료 활용도 향상 등 20년간의 성과를 요약하고 사회환경과 조사여건 변화를 반영한 건강통계 생산의 발전 방안을 제시하였다.

Key Message
The Korea National Health and Nutrition Examination Survey (KNHANES) is an ongoing surveillance system that was initiated in 1998 based on Ar¬ticle 16 of the National Health Promotion Act to produce nationwide statistics regarding the health status, health behaviors, and food and nutrient consumption of the Korean population. In this study, the 20-year accomplishments of the KNHANES including vigorous production of health indicators and improvement of data utilization are summarized, and future plans are presented to improve the health statistics to reflect changes in the social and survey environments.

Citations

Citations to this article as recorded by

Impact of the COVID-19 Pandemic on Gender Differences in Depression Based on National Representative Data
Hyunsuk Jeong, Hyeon Woo Yim, Seung-yup Lee, Da Young Jung
Journal of Korean Medical Science.2023;[Epub] CrossRef
Sex-Specific Trends in the Prevalence of Hypertension and the Number of People With Hypertension: Analysis of the Korea National Health and Nutrition Examination Survey (KNHANES) 1998–2018
Eunsun Seo, Sunjae Jung, Hokyou Lee, Hyeon Chang Kim
Korean Circulation Journal.2022; 52(5): 382. CrossRef
Inverse Association of Serum Folate Level with Metabolic Syndrome and Its Components in Korean Premenopausal Women: Findings of the 2016–2018 Korean National Health Nutrition Examination Survey
Ye-Seul Koo, Yong-Jae Lee, Jae-Min Park
Nutrients.2022; 14(4): 880. CrossRef
Lower Dietary Calcium Intake is Associated with a Higher Risk of Mortality in Korean Adults
Jin Young Yoo, Hyun Jeong Cho, Jung Eun Lee
Journal of the Academy of Nutrition and Dietetics.2022; 122(11): 2072. CrossRef
Association between exposure to fine particulate matter and kidney function: Results from the Korea National Health and Nutrition Examination Survey
Jongmin Oh, Shinhee Ye, Duk-Hee Kang, Eunhee Ha
Environmental Research.2022; 212: 113080. CrossRef
Cardiovascular Implications of the 2021 KDIGO Blood Pressure Guideline for Adults With Chronic Kidney Disease
Hyeok-Hee Lee, Hokyou Lee, Raymond R. Townsend, Dong-Wook Kim, Sungha Park, Hyeon Chang Kim
Journal of the American College of Cardiology.2022; 79(17): 1675. CrossRef
The Korea National Health and Nutrition Examination Survey data linked Cause of Death data
Sungha Yun, Kyungwon Oh
Epidemiology and Health.2022; 44: e2022021. CrossRef
Obesity, hypertension, diabetes mellitus, and hypercholesterolemia in Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey
Ga Bin Lee, Yoonjung Kim, Suyeon Park, Hyeon Chang Kim, Kyungwon Oh
Epidemiology and Health.2022; 44: e2022041. CrossRef
Mental health of Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey
Hyunsuk Jeong, Suyeon Park, Jihee Kim, Kyungwon Oh, Hyeon Woo Yim
Epidemiology and Health.2022; 44: e2022042. CrossRef
Diabetes Fact Sheet in Korea 2021
Jae Hyun Bae, Kyung-Do Han, Seung-Hyun Ko, Ye Seul Yang, Jong Han Choi, Kyung Mook Choi, Hyuk-Sang Kwon, Kyu Chang Won
Diabetes & Metabolism Journal.2022; 46(3): 417. CrossRef
Serum folate levels and hypertension
Yoonkyung Lee, Sangshin Park
Scientific Reports.2022;[Epub] CrossRef
The Relationship between Lipid Accumulation Product, Insulin Resistance and Obesity in Korean Adults
Hyun Yoon
Korean Journal of Clinical Laboratory Science.2022; 54(2): 149. CrossRef
Relationship between Anemia and Falls among Postmenopausal Women in Korea
Yunmi Kim, Jiyun Kim
International Journal of Environmental Research and Public Health.2022; 19(14): 8242. CrossRef
Smoking in the workplace: A study of female call center employees in South Korea
Hyunjin Oh, Sunjoo Boo, Petri Böckerman
PLOS ONE.2022; 17(7): e0267685. CrossRef
Alterations in Glomerular Filtration Rates Using Different Algorithms in the Korean Population Visiting Local Clinics and Hospitals
Rihwa Choi, Sang Gon Lee, Eun Hee Lee
Journal of Clinical Medicine.2022; 11(18): 5339. CrossRef
Prevalence Trends of Metabolic Syndrome among Korean Children and Adolescents from a Population-Based Cross-Sectional Survey
Ji Hyun Kim, Jung Sub Lim
Life.2022; 12(9): 1404. CrossRef
The Association of Mercury and ALT with Obesity in Korean Adults: Using Data from the Korea National Health and Nutrition Examination Survey for 11 Years (KNHANES 2005, 2008~2017)
Sang Shin Pyo
Korean Journal of Clinical Laboratory Science.2022; 54(3): 192. CrossRef
Low relative hand grip strength is associated with a higher risk for diabetes and impaired fasting glucose among the Korean population
Min Jin Lee, Ah Reum Khang, Dongwon Yi, Yang Ho Kang, Giacomo Pucci
PLOS ONE.2022; 17(10): e0275746. CrossRef
Menstrual and Reproductive Factors for Gastric Cancer in Postmenopausal Women: The 2007–2020 Korea National Health and Nutrition Examination Survey
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International Journal of Environmental Research and Public Health.2022; 19(21): 14468. CrossRef
Prevalence and management of hypertension in Korean adults
Hyeon Chang Kim
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One-year prevalence and clinical characteristics in chronic dizziness: The 2019–2020 Korean National Health and Nutrition Examination Survey
Eun Ji Kim, Hee-Jung Song, Hak In Lee, Eunjin Kwon, Seong-Hae Jeong
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Spousal concordance of ideal cardiovascular health metrics: findings from the 2014–2019 Korea National Health and Nutrition Examination Survey
Manh Thang Hoang, Hokyou Lee, Hyeon Chang Kim
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COVID-19: Special Article

Mental health of Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey: Hyunsuk Jeong, Suyeon Park, Jihee Kim, Kyungwon Oh, Hyeon Woo Yim; Epidemiol Health. 2022;44:e2022042. Published online April 25, 2022; DOI: https://doi.org/10.4178/epih.e2022042

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
Coronavirus disease 2019 (COVID-19) and the associated social distancing, limited freedom, and fear of an uncertain future are expected to have substantial mental health effects. We investigated mental health responses in the community during the first year of the COVID-19 pandemic in Korea.
METHODS
We used 2016-2019 and 2020 data from the Korea National Health and Nutrition Examination Survey (KNHANES) to assess pre-pandemic and pandemic mental health status, respectively, in terms of perceived severe stress, depression, and suicidal plans. All analyses were gender-stratified. Pre-specified subgroup analyses were performed according to age, employment status, and household income.
RESULTS
The percentage of Korean adults with suicidal plans increased significantly from 1.3%p (95% confidence interval [CI], 1.1 to 1.5) in 2016-2019 to 1.8%p (95% CI, 1.4 to 2.1) in 2020. Individuals in their 20s and 40s showed a marked increase in suicidal plans (1.2%p; 95% CI, 0.0 to 2.3 and 0.9%p; 95% CI, 0.0 to 1.8, respectively). In men, depression and perceived severe stress increased significantly from pre-COVID-19 to 2020. There was a 2.4%p (95% CI, 0.8 to 4.0) increase in depression among standard workers and a 2.9%p increase in depression in individuals in the second-highest quintile of household income from 2016 and 2018 to 2020.
CONCLUSIONS
As COVID-19 continued, mental health issues such as suicidal plans, depression, and severe stress increased significantly in young men and people in the second-highest quintile of household income. Proactive community mental health efforts are needed to prevent increases in the suicide rate resulting from prolonged exposure to the COVID-19 pandemic.; Summary

Korean summary
코로나19 이전에 비해 코로나19 유행 첫 해 동안에 전체 인구에서 자살 계획 유병율이 유의하게 증가하였고 특히 20대-40대에서 증가 비율이 높았다. PHQ-9으로 측정한 우울증 유병율은 전체 남성에서 증가하였고 특히 30대 남성에서 증가 비율이 높았다. 코로나19 영향으로 자살 계획과 우울증과 같은 정신 건강 문제가 젊은 성인에서 크게 증가하였기 때문에 이러한 정신건강 문제가 자살률 증가로 이어지는 것을 방지하기 위해 국가적 차원의 체계적인 정책과 적극적인 지역사회 정신건강 중재가 필요하다.

Key Message
There was a significant increase in the prevalence of suicidal plan in the overall population during the first year of COVID-19 pandemic compared to pre-COVID-19. In particular, suicide plans increased among those in their 20s and 40s. The prevalence of PHQ-9 detected depression increased in all men, especially among men in their 30s. As mental health problems such as suicide planning and depression have significantly increased among young adults due to the impact of COVID-19, systematic policies at the national level and active community mental health interventions are needed to prevent these mental health problems from leading to an increase in suicide rates.

COVID-19: Original Article

Depression, anxiety, and stress in Korean general population during the COVID-19 pandemic: Hooyeon Lee, Dongwoo Choi, Jung Jae Lee; Epidemiol Health. 2022;44:e2022018. Published online January 18, 2022; DOI: https://doi.org/10.4178/epih.e2022018

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Abstract

OBJECTIVES
The aim of this study was to investigate the prevalence and risk factors of poor mental health in the general Korean population during the coronavirus disease 2019 (COVID-19) pandemic.

METHODS

This cross-sectional, population-based, online survey-based study was conducted from November 5 to 20, 2020 and included adults aged 20-49 years in Chungnam Province, Korea. A total of 549 adults were included.

RESULTS

In total, 18.8% of the participants had symptoms of depression, 10.6% had symptoms of anxiety, and 5.1% had a high level of perceived stress during the COVID-19 pandemic. Higher levels of stress (odds ratio [OR], 3.13; 95% confidence interval [CI], 1.13 to 8.67), anxiety (OR, 2.33; 95% CI, 1.09 to 4.49), and depression (OR, 3.00; 95% CI, 1.64 to 5.50) were found among never married, widowed, divorced, and separated people than among married/cohabiting/partnered participants. Participants who felt increased stress at home during the COVID-19 outbreak reported more depression (OR, 2.45; 95% CI, 1.49 to 4.05) and anxiety (OR, 2.42; 95% CI, 1.31 to 4.50). Women had higher risks of anxiety (OR, 1.97; 95% CI, 1.09 to 3.58) and stress (OR, 6.40; 95% CI, 2.30 to 17.85) than men. Participants with the highest household income were less likely to report symptoms of stress than those with the lowest household income (OR, 0.24; 95% CI, 0.06 to 0.96).

CONCLUSIONS

The participants in this study exhibited poor mental health index scores, suggesting that some people are at risk for mental health problems during the COVID-19 pandemic. Being married was independently and significantly associated with a lower likelihood of depression, anxiety, and stress.

Summary

Korean summary
이 연구는 코로나-19 유행 기간 동안 정신건강 현황과 위험 요인을 알아보기 위한 단면연구이다. 코로나 19 유행 이후 가정내 스트레스가 증가했다고 응답한 경우 우울증과 불안감의 유병률이 높았다. 반면, 남성인 경우, 결혼했거나 동거인과 같이 살고 있는 경우에는 우울증, 불안 또는 스트레스의 유병률이 통계적으로 유의하게 낮았다. 마스크 착용하기, 비대면 활동 증가, 또는 사회적 거리두기 등 코로나 19의 유행을 통제하기 위한 많은 정책은 개인의 일상생활과 정신건강에 많은 영향을 미쳤다. 이 연구는 취약 집단을 발굴하고, 정신건강 회복을 위한 전략을 개발하는데 기초자료를 제공할 수 있다.

Key Message
This study revealed high prevalence rates of depression, anxiety, and stress in the general population of Korea aged 20-49 years during the COVID-19 pandemic. Participants who felt increased stress at home reported more depression and anxiety. Men and being married were significantly associated with a lower likelihood of depression, anxiety, or stress. The COVID-19 pandemic has been a traumatic event. In addition, the policies created to prevent its spread have disrupted daily living for the general population. Implementing strategies to promote resilience and support psychologically vulnerable individuals during the COVID-19 crisis is of fundamental importance.

Citations

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Assessing Knowledge, Preventive Practices, and Depression Among Chinese International Students and Local Korean Students in South Korea During the COVID-19 Pandemic: An Online Cross-Sectional Study
Xiaoxu Jiang, Bo Zhao, Eun Woo Nam, Fanlei Kong
Frontiers in Psychiatry.2022;[Epub] CrossRef
Association of compliance with COVID-19 public health measures with depression
Ju An Byun, Tae Jun Sim, Tae Yoon Lim, Sung-In Jang, Seung Hoon Kim
Scientific Reports.2022;[Epub] CrossRef
Factors associated with depressive symptomatology during the COVID-19 pandemic in Mexico: A 2021 national survey
Pablo D. Valencia, Maria A. Torres-Quispe, Sofía Sánchez-Cayo, Ricardo F. Reyes-Aguilar, Alexander G. Acevedo-Cahuana
Journal of Affective Disorders.2022; 317: 212. CrossRef
Depression and anxiety in later COVID-19 waves across Europe: New evidence from the European COvid Survey (ECOS)
André Hajek, Sebastian Neumann-Böhme, Iryna Sabat, Aleksandra Torbica, Jonas Schreyögg, Pedro Pita Barros, Tom Stargardt, Hans-Helmut König
Psychiatry Research.2022; 317: 114902. CrossRef
Socio-economic factors associated with mental health outcomes during the COVID-19 pandemic in South Korea
Seo Yoon Lee, Jung Jae Lee, Hooyeon Lee
Frontiers in Public Health.2022;[Epub] CrossRef

COVID-19: Special Article

Smoking, drinking, and physical activity among Korean adults before and during the COVID-19 pandemic: a special report of the 2020 Korea National Health and Nutrition Examination Survey: Sunhye Choi, Jinwook Bahk, Suyeon Park, Kyungwon Oh, Kyunghee Jung-Choi; Epidemiol Health. 2022;44:e2022043. Published online April 25, 2022; DOI: https://doi.org/10.4178/epih.e2022043

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
This study aimed to describe trends in health behaviours between 2011 and 2020 and compare the changes in these behaviours between the 2020 COVID-19 pandemic and previous periods according to socio-demographic variables.

METHODS

This study used data from the 2011 to 2020 Korea National Health and Nutrition Examination Survey. Current cigarette smoking, high-risk drinking, and inadequate physical activity levels were used as health behaviour indicators. The age-standardized prevalence, differences in prevalence between the periods, and the annual percentage change (APC) were calculated.

RESULTS

Current cigarette smoking showed a decreasing trend (APC, -2.6), high-risk drinking remained unchanged, and inadequate physical activity levels increased (APC, 3.5) during 2011-2020. There were significant differences in high-risk drinking (3.1%p; 95% confidence interval [CI], 0.3 to 5.9) and inadequate physical activity levels (4.3%p; 95% CI, 0.4 to 8.1) between 2019 and 2020 in men. Among men, increased high-risk drinking was found in those aged 40-49 years, non-single households, urban residents, and the middle and highest income groups between 2019 and 2020. The low educational group and manual workers among men aged 30-59 years also showed an increased proportion of high-risk drinking. Inadequate physical activity levels also increased among men between 2019 and 2020 in those aged 30-39 years, non-single households, urban residents, and the upper-middle-income group.

CONCLUSIONS

In the first year of the COVID-19 pandemic, Korean men’s high-risk drinking and inadequate physical activity levels increased. In addition to social efforts to reduce the spread of infectious diseases, active measures to positively change health behaviour are needed.

Summary

Korean summary
코로나 대유행 첫 해인 2020년, 한국 남성에서 고위험음주와 부적절한 신체 활동 수준이 증가하였다. 감염성 질환 대유행 시기, 확산을 차단하기 위한 사회적 노력과 더불어 건강행태에 부정적인 여파가 미치지 않도록 적극적인 대책이 필요함을 시사한다.

Key Message
In the first year of the COVID-19 pandemic, Korean men’s high-risk drinking and inadequate physical activity levels increased. Despite Korea's positive performance in various indicators during the COVID-19 pandemic, the socioeconomic and cultural effects of COVID-19 have affected people's health behaviour. In addition to social efforts to reduce the spread of infectious diseases, active measures to positively change health behaviour are needed.

Citations

Citations to this article as recorded by

Current status of health promotion in Korea
Soo Young Kim
Journal of the Korean Medical Association.2022; 65(12): 776. CrossRef

COVID-19: Original Article

Model-based cost-effectiveness analysis of oral antivirals against SARS-CoV-2 in Korea: Youngji Jo, Sun Bean Kim, Munkhzul Radnaabaatar, Kyungmin Huh, Jin-Hong Yoo, Kyong Ran Peck, Hojun Park, Jaehun Jung; Epidemiol Health. 2022;44:e2022034. Published online March 12, 2022; DOI: https://doi.org/10.4178/epih.e2022034

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Abstract Summary PDF Supplementary Material

Abstract

OBJECTIVES
Many countries have authorized the emergency use of oral antiviral agents for patients with mild-to-moderate cases of coronavirus disease 2019 (COVID-19). We assessed the cost-effectiveness of these agents for reducing the number of severe COVID-19 cases and the burden on Korea’s medical system.

METHODS

Using an existing model, we estimated the number of people who would require hospital/intensive care unit (ICU) admission in Korea in 2022. The treatment scenarios included (1) all adult patients, (2) elderly patients only, and (3) adult patients with underlying diseases only, compared to standard care. Based on the current health system capacity, we calculated the incremental costs per severe case averted and hospital admission for each scenario.

RESULTS

We estimated that 236,510 COVID-19 patients would require hospital/ICU admission in 2022 with standard care only. Nirmatrelvir/ritonavir (87% efficacy) was predicted to reduce this number by 80%, 24%, and 17% when targeting all adults, adults with underlying diseases, and elderly patients (25, 8, and 4%, respectively, for molnupiravir, with 30% efficacy). Nirmatrelvir/ritonavir use is likely to be cost-effective, with predicted costs of US$8,878, US$8,964, and US$1,454, per severe patient averted for the target groups listed above, respectively, while molnupiravir is likely to be less cost-effective, with costs of US$28,492, US$29,575, and US$7,915, respectively.

CONCLUSIONS

In Korea, oral treatment using nirmatrelvir/ritonavir for symptomatic COVID-19 patients targeting elderly patients would be highly cost-effective and would substantially reduce the demand for hospital admission to below the capacity of the health system if targeted to all adult patients instead of standard care.

Summary

Korean summary
본 연구는 감염병 수리모형을 바탕으로 두가지 항바이러스제의 (nirmatrelvir/ritonavir와 molnupiravir) 비용 효익을 평가하였다. 본 모델에 따르면, 2022년 한국에서, 현재 의료시스템의 수용한계를 넘는 코로나 19 대유행이 발생할 때, nirmatrelvir/ritonavir 를 코로나 감염 및 증상 있는 고령층 환자들을 대상으로 투여할 경우 높은 비용 효익이 기대되고 (중증환자 1명 감소효과에$1,454 비용소요), 성인 환자 대상으로 투여할 경우, (molnupiravir이나 nirmatrelvir/ritonavir를 투여하지 않는) 일반 치료에 비해서 전체 입원 수요를 80% 줄일 것으로 기대된다.

Key Message
Given an expected high epidemic resurgence in 2022 that could exceed South Korea’s current health system capacity, oral treatment using nirmatrelvir/ritonavir for symptomatic COVID-19 patients may be a highly cost-effective solution if targeted to elderly patients ($1,454 per severe case averted) and substantially reduce the demand for hospital admission (80%, 188,478 patients) below the capacity of the health system if targeted to all adult patients compared to standard care.

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Multi-Faceted Analysis of COVID-19 Epidemic in Korea Considering Omicron Variant: Mathematical Modeling-Based Study
Youngsuk Ko, Victoria May Mendoza, Renier Mendoza, Yubin Seo, Jacob Lee, Jonggul Lee, Donghyok Kwon, Eunok Jung
Journal of Korean Medical Science.2022;[Epub] CrossRef
Adjusting non-pharmaceutical interventions based on hospital bed capacity using a multi-operator differential evolution
Victoria May P. Mendoza, Renier Mendoza, Jongmin Lee, Eunok Jung
AIMS Mathematics.2022; 7(11): 19922. CrossRef
The Possible Impact of Nationwide Vaccination on Outcomes of the COVID-19 Epidemic in North Korea: A Modelling Study
Sung-mok Jung, Jaehun Jung
Journal of Korean Medical Science.2022;[Epub] CrossRef
Impact of the Use of Oral Antiviral Agents on the Risk of Hospitalization in Community Coronavirus Disease 2019 Patients (COVID-19)
Terry Cheuk Fung Yip, Grace Chung Yan Lui, Mandy Sze Man Lai, Vincent Wai Sun Wong, Yee Kit Tse, Bosco Hon Ming Ma, Elsie Hui, Maria K W Leung, Henry Lik Yuen Chan, David Shu Cheong Hui, Grace Lai Hung Wong
Clinical Infectious Diseases.2022;[Epub] CrossRef
Medications for early treatment of COVID ‐19 in Australia
Adam Polkinghorne, James M Branley
Medical Journal of Australia.2022;[Epub] CrossRef
Comparative effectiveness of sotrovimab and molnupiravir for prevention of severe covid-19 outcomes in patients in the community: observational cohort study with the OpenSAFELY platform
Bang Zheng, Amelia C A Green, John Tazare, Helen J Curtis, Louis Fisher, Linda Nab, Anna Schultze, Viyaasan Mahalingasivam, Edward P K Parker, William J Hulme, Sebastian C J Bacon, Nicholas J DeVito, Christopher Bates, David Evans, Peter Inglesby, Henry D
BMJ.2022; : e071932. CrossRef
Nirmatrelvir plus ritonavir in COVID-19: a profile of its use
Hannah A. Blair
Drugs & Therapy Perspectives.2022;[Epub] CrossRef
Treatment Options for Patients With Mild-to-Moderate Coronavirus Disease 2019 in Korea
Jaehyun Jeon, BumSik Chin
Journal of Korean Medical Science.2022;[Epub] CrossRef

Review

Epidemiology of myocardial infarction in Korea: hospitalization incidence, prevalence, and mortality: Rock Bum Kim, Jang-Rak Kim, Jin Yong Hwang; Epidemiol Health. 2022;44:e2022057. Published online July 12, 2022; DOI: https://doi.org/10.4178/epih.e2022057

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Abstract

Few studies have comprehensively presented epidemiological indicators of myocardial infarction in Korea. However, multiple published articles and open-source secondary data on the epidemiology of myocardial infarction are now available. This review summarized the hospitalization incidence, prevalence, and mortality rate of myocardial infarction in Korea using articles and open-source data from the Health Insurance Service and the Department of Statistics, surveys of sample populations, registries of patients, and other sources. The epidemiological indicators of myocardial infarction were compared between Korea and other high-income countries. The incidence of hospitalization due to myocardial infarction in Korea was 43.2 cases per 100,000 population in 2016 and has consistently increased since 2011. It was 2.4 times higher among men than among women. The estimated prevalence among adults over 30 years of age ranged from 0.34% to 0.70% in 2020; it was higher among men and increased with age. The mortality in 2020, which was 19.3 per 100,000 population in 2020, remained relatively stable in recent years. Mortality was higher among men than among women. Based on representative inpatient registry data, the proportion of ST-elevated myocardial infarction decreased until recently, and the median time from symptom onset to hospital arrival was approximately 2 hours and 30 minutes. The hospitalization incidence, prevalence, and mortality rate of myocardial infarction were lower in Korea than in other countries, although there was an increasing trend. Comprehensive national-level support and surveillance systems are needed to routinely collect accurate epidemiological indicators.

Summary

Korean summary
○우리나라의 심근경색증 발생률은 2016년 기준 인구 10만명 당 43.2명으로 추정되며 2011년 이후 증가하고 있음. ○ 30세 이상 인구에서 심근경색증 유병률은 0.34% (건강보험청구데이터) 또는 1.0% (국민건강영양조사)로 추정됨. ○ 전체인구에서 심근경색증으로 인한 사망률은 2019년 인구 10만명 당 18.8명으로 최근 큰 변화가 없거나 약간 감소하는 추세임.

Key Message
This review article showed the hospitalized incidence, prevalence, mortality, and features on patient registry of myocardial infarction in Korea from published articles and opened data sources.

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Systematic review and meta-analysis of the intervention effect of curcumin on rodent models of myocardial infarction
Bing-Yao Pang, Ya-Hong Wang, Xing-Wang Ji, Yan Leng, Hou-Bo Deng, Li-Hong Jiang
Frontiers in Pharmacology.2022;[Epub] CrossRef

Original Article

Blood lipid levels and all-cause mortality in older adults: the Chinese Longitudinal Healthy Longevity Survey 2008-2018: Rongxi Wang, Xiaoyue Yu, Zhiqiang Wang, Yujie Liu, Hui Chen, Shangbin Liu, Chen Xu, Yingjie Chen, Xin Ge, Danni Xia, Ruijie Chang, Gang Xu, Mi Xiang, Ying Wang, Tian Shen, Fan Hu, Yong Cai; Epidemiol Health. 2022;44:e2022054. Published online July 5, 2022; DOI: https://doi.org/10.4178/epih.e2022054

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Abstract PDF Supplementary Material: Abstract
OBJECTIVES
Proper blood lipid levels are essential for survival in older adults, but inconsistent relationships have been reported between blood lipids and all-cause mortality in the elderly.
METHODS
This retrospective longitudinal study analyzed data from 1,067 Chinese older adults enrolled in the Chinese Longitudinal Healthy Longevity Survey collected in 2008 and followed up until death or December 31, 2018. The outcome was all-cause mortality. Multivariate Cox regression analyses were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) with stratification by age (60-80, 80-100, or ≥100 years) for further analysis. The survival probability according to lipid profile quartiles was calculated using Kaplan-Meier curves and the log-rank test.
RESULTS
The participants’ mean age was 84.84 years, and 57.0% were female. In total, 578 individuals died, and 277 were lost to follow-up. The mean total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C) levels were higher among those who died than among those who survived. Participants in the second HDL-C quartile and the highest LDL-C and triglyceride (TG) quartiles had 28% higher, 23% lower, and 49% lower risks of all-cause mortality, respectively. After further adjustment, the associations remained except for HDL-C, and additional associations were observed between all-cause mortality and the third TC and LDL-C quartiles and the second TG quartile (HR, 1.44; 95% CI, 1.01 to 2.06; HR, 0.68; 95% CI, 0.49 to 0.94; HR, 0.79; 95% CI, 0.62 to 0.99, respectively).
CONCLUSIONS
Older adults should maintain an LDL-C level of 1.91-2.47 mmol/L and a TG level of no less than 1.66 mmol/L.; Summary

Korean summary

Key Message
The retrospective longitudinal study analyzed data from 1067 Chinese older adults enrolled in the Chinese Longitudinal Healthy Longevity Survey. 578 individuals died and 277 were lost to follow-up. Participants in the second HDL-C quartile and the highest LDL-C and TG quartiles had 28% higher, 23% lower, and 49% lower risks of all-cause mortality. After further adjustment, the associations remained except for HDL-C, and additional associations were observed between all-cause mortality and the third TC and LDL-C quartiles and the second TG quartile (HR, 1.44; 95% CI, 1.01 to 2.06; HR, 0.68; 95% CI, 0.49 to 0.94; HR, 0.79; 95% CI, 0.62 to 0.99).

COVID-19: Epidemiologic Investigation

Analysis of the on-ship transmission of the COVID-19 mass outbreak on the Republic of Korea Navy amphibious warfare ship: Soo Hyeon Cho, Young-Man Kim, Gyeongyong Seong, Sunkyun Park, Seoncheol Park, Sang-Eun Lee, Young Joon Park; Epidemiol Health. 2022;44:e2022065. Published online August 11, 2022; DOI: https://doi.org/10.4178/epih.e2022065

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Abstract Summary PDF Supplementary Material: Abstract
OBJECTIVES
This investigation was conducted to determine the size and pattern, source, and transmission route of the coronavirus disease 2019 (COVID-19) outbreak on the Republic of Korea Navy (ROKN) amphibious warfare ship.
METHODS
We investigated the characteristics of all crew members and tracked the medical records of the confirmed cases. Fourteen essential ship operation personnel were interviewed. The study design was a retrospective cohort study, and the incidence rate ratio was through a statistical program.
RESULTS
The COVID-19 incidence on the ROKN amphibious warfare ship was 44.7% (38/85). It was estimated that the main propagation route started from the 1st floor worker, which spread to the same floor, and then to other floors. In the case of the working area, the incidence rate of crew members below the 1st floor without ventilation was higher than those on the 2nd or higher floors with natural ventilation.
CONCLUSIONS
This case is the first case of a COVID-19 outbreak on the ROKN amphibious warfare ship, and it is estimated that the incidence rate is high because of the closed and dense environment. To prevent the spread of various respiratory diseases including COVID-19, unified mitigation such as vaccination, observing personal quarantine rules, periodic ventilation, preemptive testing, and blocking transmission through prompt contact management is necessary.; Summary

Korean summary
본 조사는 국내 첫 해군 상륙함 내 코로나19 집단발생의 규모 및 양상, 감염원과 전파경로를 규명하기 위해 수행되었다. 해군 상륙함에서의 발생률은 44.7%였으며 자연 환기가 가능한 2층 이상 근무자에 비해 환기가 불가능한 1층 이하 근무자의 발생률이 높았고 이는 통계적으로 유의했다. 밀폐된 환경에서 밀접한 생활을 하는 해군 상륙함의 특성을 고려하여 개인방역수칙 준수, 주기적 환기, 선제적 검사, 신속한 접촉자 관리 등을 통한 전파 차단이 필요할 것으로 판단된다.

Key Message
This investigation was conducted to determine the size and pattern of the outbreak of the COVID-19 infection, the source of infection and the transmission route on the ROK Navy Amphibious Warfare ship. The incidence on ROKN Amphibious Warfare ship was 44.7% (38/85) and the incidence rate of crew members below the first floor without ventilation was higher than those on the second floor or higher with natural ventilation. To prevent various respiratory diseases including COVID-19, unified mitigation such as vaccination, observing personal quarantine rules, periodic ventilation, preemptive testing, and blocking transmission through prompt contact management is necessary.

Data Profile

The Korea National Health and Nutrition Examination Survey data linked Cause of Death data: Sungha Yun, Kyungwon Oh; Epidemiol Health. 2022;44:e2022021. Published online February 9, 2022; DOI: https://doi.org/10.4178/epih.e2022021

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Abstract Summary PDF Supplementary Material

Abstract

The Korea National Health and Nutrition Examination Survey (KNHANES) is a national health survey that is conducted annually to assess the health and and health-related behaviors of Korean population. To utilize KNHANES data to studies of mortality risk factors, the Korea Disease Control and Prevention Agency (KDCA) constructed a database linking KNHANES data to cause-of-death statistics in Statistics Korea, made available to researchers since 2020. The KNHANES data were linked to the Cause of Death Statistics based on resident registration numbers for subjects aged 19 years or older who agreed to link the data. The linkage rate between 2007-2015 National Health and Nutrition Examination Survey and 2007-2019 Cause of Death Statistics was 97.1%. In the linked dataset, the total death rate was 6.6%, of which neoplasms accounted for the highest death rate (32.1%), followed by circulatory system disease (22.7%) and respiratory system disease (11.5%). The linked dataset was made available through the Research Data Center of the KDCA after a review of the research proposal, and will be made available after periodical updates.

Summary

Korean summary
1. 국민건강영양조사 자료가 사망 위험요인 규명 연구에 활용되도록 통계청의 사망원인통계와 연계자료 구축함 2. 2007~2015년 국민건강영양조사와 2007~2019년 사망원인통계의 연계율은 97.1%이었음 3. 국민건강영양조사-사망원인통계 연계자료는 2020년부터 연구자에게 질병관리청 내 학술연구자료처리실를 통해 제공되고 있음

Key Message
1. To utilize the Korea National Health and Nutrition Examination Survey (KNHANES) data to studies of mortality risk factors, the data were linked to the Cause of Death Statistics in the Statistics Korea. 2. The linkage rate between the 2007-2015 KNHANES and the 2007-2019 Cause of Death Statistics was 97.1%. 3. The Korea National Health and Nutrition Examination Survey data linked Cause of Death data have been provided to researchers through the Research Data Center in the Korea Disease Control and Prevention Agency (KDCA) since 2020.

Citations

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Computational method of the cardiovascular diseases classification based on a generalized nonlinear canonical decomposition of random sequences
Igor Atamanyuk, Yuriy Kondratenko, Valerii Havrysh, Yuriy Volosyuk
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Original Article

The probability of diagnostic delays for tuberculosis and its associated risk factors in northwest Iran from 2005 to 2016: a survival analysis using tuberculosis surveillance data: Reza Ebrahimoghli, Hassan Ghobadi, Davoud Adham, Parviz Jangi, Abbas Abbasi-Ghahramanloo, Eslam Moradi-Asl; Epidemiol Health. 2022;44:e2022060. Published online July 18, 2022; DOI: https://doi.org/10.4178/epih.e2022060

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Abstract PDF: Abstract
OBJECTIVES
Early diagnosis is essential for effective tuberculosis (TB) control programs. Therefore, this study examined the risk of delays in TB diagnosis and associated factors in Ardabil Province in northwest Iran from 2005 to 2016.
METHODS
This longitudinal retrospective cohort study was conducted using data obtained from the Iranian National Tuberculosis Control Program at the provincial level between 2005 and 2016. The total delay in diagnosis was defined as the time interval (days) between the onset of symptoms and TB diagnosis. Survival analysis was conducted to analyze the delay in diagnosis. Associated factors were identified using a Cox proportional hazards model.
RESULTS
A total of 1,367 new TB cases were identified. The 12-year median diagnostic delay was 45 days (interquartile range [IQR], 30-87). The annual median diagnostic delay decreased from 68 days (IQR, 33-131) in 2005 to 31 days (IQR, 30-62) in 2016. The probability of a delay in TB diagnosis decreased by 5.0% each year (hazard ratio [HR], 1.05; 95% confidence interval [CI], 1.04 to 1.07). Residence in a non-capital county (HR, 0.83; 95% CI, 0.74 to 0.92) and referral from the private health system (HR, 0.74%; 95% CI, 0.65 to 0.84) were significantly associated with an increased risk of delay in TB diagnosis over the 12-year study period.
CONCLUSIONS
The median delay decreased during the study period. We identified factors associated with a longer delay in TB diagnosis. These findings may be useful for further TB control plans and policies in Iran.; Summary

Korean summary

Key Message
A longitudinal analysis of tuberculosis surveillance data from northwest Iran showed that during the 12-year period from 2005 to 2016, a total of 1,367 tuberculosis cases were registered, of whom 942 patients had a prolonged diagnostic delay (>30 days) and the probability of a delay in tuberculosis diagnosis decreased by 5.0% each year.

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