Journal of Preventive Medicine and Public Health

Brief Report

Long Working Hours and Risk of Ischemic Heart Disease Among Japanese Workers: The Jichi Medical School Cohort Study: Mayumi Saiki, Akizumi Tsutsumi, Jian Li; J Prev Med Public Health. 2026;59(2):211-218. Published online February 5, 2026; DOI: https://doi.org/10.3961/jpmph.25.577

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Abstract Summary PDF Supplementary Material: Objectives
Karoshi, or “death from overwork,” has been recognized for decades; however, epidemiological findings regarding long working hours (LWH) and ischemic heart disease (IHD) remain inconsistent. This study aimed to provide new evidence on the association between LWH and IHD, while accounting for job strain among Japanese workers, both male and female.
Methods
This study utilized data from 6670 workers participating in the Jichi Medical School Cohort Study. Baseline working hours were categorized as <5.0, 5.0 to 6.9, 7.0 to 8.9 (reference), 9.0 to 10.9, and ≥11.0 hr/day. Fatal and non-fatal incident IHD cases were determined during follow-up using International Classification of Diseases, 10th revision codes. Multivariable Cox proportional hazards models were used to examine associations, adjusting for socio-demographic factors, lifestyle behaviors, cardiometabolic characteristics, and job strain.
Results
During a mean follow-up of 12 years, 58 incident IHD cases (42 male and 16 female) were documented. Long working hours (≥11.0 hr/day) were significantly associated with an increased risk of IHD in the total sample (hazard ratio, 2.92; 95% confidence interval, 1.15 to 7.39), and the overall pattern of associations was similar in sex-stratified analyses.
Conclusions
These findings suggest that LWH independently increases the risk of IHD among Japanese workers, even after adjustment for job strain, underscoring the importance of managing working hours to reduce karoshi in both male and female workers.; Summary

Key Message
Our study provides new evidence on the association between long working hours (LWH) and ischemic heart disease (IHD), while accounting for job strain among Japanese workers, both male and female, utilizing data from the Jichi Medical School Cohort Study. Our study revealed that LWH (≥11.0 hr/day) were significantly associated with an increased risk of IHD in the total sample (hazard ratio, 2.92; 95% confidence interval, 1.15 to 7.39). These findings suggest that LWH increase the risk of IHD among Japanese workers, underscoring the importance of managing working hours to reduce karoshi in both male and female workers.

Original Articles

Exposure to Benzene, Toluene, Ethylbenzene, and Xylenes and Risk of Depression: A Cross-sectional Study of a National Sample of Korean Adults: Hyun-Wook Park, Byung-Sun Choi, Bomi Park, Wanhyung Lee, Weon-Young Lee; J Prev Med Public Health. 2026;59(1):95-104. Published online November 6, 2025; DOI: https://doi.org/10.3961/jpmph.25.522

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Abstract Summary PDF Supplementary Material: Objectives
Benzene, toluene, ethylbenzene, and xylenes (BTEX) are co-occurring neurotoxicants that are structurally similar aromatic hydrocarbons sharing common metabolic pathways and mechanisms of toxicity. This study investigated the effects of BTEX exposure on depression and aimed to identify the primary contributors to depression risk.
Methods
We conducted a cross-sectional analysis of 1733 adults from the 2020–2021 Korea National Health and Nutrition Examination Survey. BTEX exposure was quantified based on urinary metabolite concentrations: S-phenylmercapturic acid (SPMA) for benzene, benzylmercapturic acid for toluene, the sum of phenylglyoxylic acid and mandelic acid for ethylbenzene, and methylhippuric acid for xylenes. Depression was defined according to self-reported physician diagnosis. Logistic regression was used to estimate the risk associated with individual chemicals, while weighted quantile sum (WQS) regression was employed to assess mixture effects and identify the primary toxicant. Sensitivity analyses were performed to address potential confounding by tobacco smoke.
Results
Urinary SPMA concentrations were significantly higher in individuals with depression. Logistic regression revealed a significant association between SPMA levels and depression (odds ratio, 2.62; 95% confidence interval, 1.34 to 5.13). Although the overall BTEX mixture was not significantly associated with depression after covariate adjustment in WQS models, SPMA consistently emerged as the major contributor. The association between SPMA and depression remained robust in sensitivity analyses excluding participants exposed to tobacco smoke.
Conclusions
Benzene exposure was associated with an increased risk of depression in the general Korean adult population. Therefore, strengthened environmental regulations on benzene could help reduce the public health burden of depression.; Summary

Korean summary
본 연구는 2020–2021년 국민건강영양조사 자료를 활용하여 한국 성인에서 요중 벤젠, 톨루엔, 에틸벤젠, 자일렌 대사체 농도와 우울증 위험 간의 연관성을 분석하였다. 분석 결과, 벤젠의 대사체인 요중 S-phenyl-mercapturic acid는 우울증 위험 증가와 연관성을 보였다. 흡연 요인을 제외한 민감도 분석에서도 연관성은 일관되게 유지되어, 벤젠 노출 저감을 위한 환경적 관리 강화가 우울증 예방에 기여할 수 있음을 시사한다.

Key Message
This study investigated the association between urinary metabolites of benzene, toluene, ethylbenzene, and xylene and depression risk among Korean adults, using data from the Korea National Health and Nutrition Examination Survey 2020–2021. The findings indicated a significant association between urinary S-phenyl-mercapturic acid, a metabolite of benzene, and an increased risk of depression. This association remained robust after excluding smoking factors, underscoring the potential benefits of improved environmental management in reducing benzene exposure to prevent depression.

Prevalence and Severity of Depression Among Patients With Anemia Attending a Rural Outpatient Clinic in Faridabad, India: A Cross-sectional Study: Prince , Urvashi , Rajat Sharma, Jubair Shamsi, Satya Vir Singh; J Prev Med Public Health. 2025;58(6):629-634. Published online August 9, 2025; DOI: https://doi.org/10.3961/jpmph.25.363

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Abstract Summary PDF: Objectives
This study was performed to determine the prevalence and severity of depression among patients previously diagnosed with anemia and to explore associated clinical and socio-demographic factors.
Methods
This cross-sectional study was conducted from October 2024 to February 2025, among 300 patients with anemia attending the outpatient clinic at the Rural Health Training Centre, Amrita School of Medicine, Faridabad, Haryana. Data on socio-demographic and clinical variables were collected using a structured questionnaire. Depression was evaluated using the Patient Health Questionnaire-9 (PHQ-9). Associations of anemia severity with depression presence and severity were analyzed using the chi-square test, logistic regression, and ordinal logistic regression, with adjustment for potential confounders.
Results
The prevalence of depression (PHQ-9 score>9) among patients with anemia was 31.3%. Severe anemia was significantly associated with higher odds of depression (adjusted odds ratio [aOR], 3.02; 95% confidence interval [CI], 1.13 to 8.07; p=0.027) and more severe depression (aOR, 2.87; 95% CI, 1.14 to 7.27; p=0.026). Symptoms such as weakness (aOR, 3.57) and shortness of breath (aOR, 2.71) were also significantly associated with depression. Moderate anemia displayed a non-significant trend.
Conclusions
Severe anemia is independently associated with both the presence and severity of depression. Routine mental health screening should be integrated into anemia management protocols, especially in rural healthcare settings.; Summary

Key Message
Anemia is a common problem in India, whereas there is a growing awareness about mental health issues like depression. This study was conducted at a Rural Health Training Centre in India, to estimate the prevalence and severity of depression among patients with anemia. The prevalence of anemia was found to be 31.3% (PHQ-9 score > 9), and severe anemia was associated with higher odds of depression and more severe depression. Our study indicated a need of routine mental health screening in patients with anemia.

Mobile App-based Care Management Training to Improve Family Caregiver Competence in Caring for Children With HIV in Indonesia: A Quasi-experimental Study: Nyimas Heny Purwati, Syamikar Baridwan Syamsir, Mutmainah , Dhea Natashia, Amelia Hartika Rani, Dwi Budiyati, Agus Setiawan; J Prev Med Public Health. 2025;58(5):516-526. Published online May 7, 2025; DOI: https://doi.org/10.3961/jpmph.24.789

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Abstract Summary PDF: Objectives
Family caregivers play a crucial role in the care of children with human immunodeficiency virus (HIV); however, they frequently face limitations in knowledge, attitudes, and skills. Mobile application (app)-based training may offer an effective solution to enhance caregiver competence. This study aimed to assess the effectiveness of mobile app-based care management training in improving the knowledge, attitudes, and skills of family caregivers caring for children with HIV.
Methods
A quasi-experimental design, including pretest, posttest, and follow-up assessments, was conducted at a national referral hospital for infectious diseases in Jakarta, Indonesia. The study involved 44 respondents, divided equally into intervention and control groups (22 per group). The intervention group received mobile app-based training, while the control group received conventional caregiver education. Questionnaires assessing caregivers’ knowledge, attitudes, and skills in managing children with HIV were utilized. Data were analyzed using independent sample t-tests and repeated measures analysis of variance (ANOVA).
Results
Repeated measures ANOVA revealed that the intervention group experienced significant improvements in knowledge, attitudes, and skills from pretest to posttest, which were maintained at the 1-month follow-up (p<0.001). In contrast, the control group did not exhibit significant changes in any of these variables (knowledge, attitudes, and skills) throughout the study period.
Conclusions
Mobile app-based care management training significantly enhances caregiving competencies among family caregivers of children with HIV. These findings underscore the potential of digital technology as an innovative and sustainable approach for caregiver training in various healthcare settings, supporting the long-term effectiveness of educational interventions.; Summary

Key Message
This quasi-experimental study evaluated the effectiveness of a mobile app-based care management training for family caregivers of children with HIV in Indonesia. The intervention significantly improved caregivers’ knowledge, attitudes, and skills compared to the control group. These findings suggest that digital health tools can empower caregivers, enhance pediatric HIV care, and provide a scalable model for supportive training in resource-limited settings.

Global Trends in Childhood Sexual Abuse and Bullying Victimization in 204 Countries: A Comprehensive Analysis From 1990 to 2019: Nasrin Borumandnia, Mohammadamin Sabbagh Alvani, Payam Fattahi, Mahmood Reza Gohari, Yashar Kheirolahkhani, Hamid Alavimajd; J Prev Med Public Health. 2024;57(6):530-539. Published online August 15, 2024; DOI: https://doi.org/10.3961/jpmph.24.007

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Abstract Summary PDF

Objectives
No comprehensive analysis has yet been published regarding global trends in childhood sexual abuse (CSA) and bullying victimization (BV). The present study offers a longitudinal perspective on their prevalence worldwide.
Methods
CSA and BV rates were extracted from the Global Burden of Disease study, spanning the years 1990 to 2019 across 204 countries. Trends by gender, region, and human development index (HDI) were examined.
Results
For both boys and girls, and in both high-HDI and low-HDI countries, CSA rates did not significantly change from 1990 to 2019 (p>0.05). However, BV rates increased significantly in high-HDI and low-HDI countries for both genders (p<0.001). Subsequently, we analyzed trends separately by gender across all countries, without considering development level. In this analysis, CSA rates among girls decreased from 1990 to 2000, followed by an increasing tendency after 2000; overall, an upward trend was evident between 1990 and 2019 (p=0.029). In contrast, no significant pattern was observed for boys. Notably, BV demonstrated an increasing trend across all regions when HDI was not considered (p<0.05), with African populations experiencing the most pronounced rise (p<0.001). Globally, boys consistently exhibited higher BV rates than girls.
Conclusions
Our research indicates that, on a global scale, rates of CSA among girls have been rising. Additionally, BV rates have increased in all regions for both boys and girls. Notably, this trend in BV rates is occurring irrespective of HDI. These findings underscore the necessity for targeted interventions in areas with high rates of CSA and BV.

Summary

Key Message
This study analyzes global trends in childhood sexual abuse (CSA) and bullying victimization (BV) from 1990 to 2019 across 204 countries. Results indicate a significant rise in BV rates globally, with boys consistently exhibiting higher rates than girls. While CSA rates among girls show an upward trend, no significant change is observed for boys. These findings highlight the urgent need for targeted interventions to address CSA and BV worldwide.

Citations

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Childhood sexual abuse and bullying victimization: National, regional and global trend analysis from global burden of disease data 1990–2021
Kaleem Maqsood, Azeem Saeed, Mahnoor Fatima, Abdul Quddoos, Bakhtawar Haseeb, Yongze Li
Child Abuse & Neglect.2026; 175: 107982. CrossRef
Shadows of doubt: Ambivalent acknowledgment of abuse and identification with the aggressor
Edna Porat-Moeller, Anastasia Keidar, Lee Gafter, Yael Lahav
Child Abuse & Neglect.2025; 163: 107401. CrossRef
Sensory modulation difficulties and complex PTSD among child abuse survivors
Nitzan Avigail Kidra, Lee Gafter, Tami Bar-Shalita, Yael Lahav
European Journal of Psychotraumatology.2025;[Epub] CrossRef
Global burden of noncommunicable diseases attributable to modifiable behavioral risks among adolescents and young adults aged 10–24 years, 1990–2021
Yunfei Feng, Da Sun, Xuren Sun, Qiqiang Guo, Jing Zhang, Yongze Li
BMC Medicine.2025;[Epub] CrossRef
Adverse experiences in childhood and young adulthood, genetic susceptibility, and neurodegenerative disease incidence: a lifespan analysis
Jie Li, Xiaoqin Xu, Ying Sun, Yanqi Fu, Xiao Tan, Ningjian Wang, Yingli Lu, Jiang Li, Bin Wang
European Journal of Psychotraumatology.2025;[Epub] CrossRef
The mediating role of self-esteem in the link between childhood adversities and criminality among North African adult males: A case-control study
Imen Mlouki, Arij Soussi, Emna Hariz, Aya Ajmi Blout, Marwa Boussaid, Ahmed Moustafa, Abir Aissaoui, Sana El Mhamdi
Child Abuse & Neglect.2025; 169: 107718. CrossRef

The Influence of Family Adversities on Longitudinal Changes in Physical Inactivity Among Korean Adolescents During the COVID-19 Pandemic: Tae Kyoung Lee, Jing Zhu, Young Mi Kim, Ze-Kai Jiang, Meilin Zhang, Won Ha Choi, Tae-Young Pak, Hana Song; J Prev Med Public Health. 2024;57(5):443-450. Published online August 4, 2024; DOI: https://doi.org/10.3961/jpmph.24.236

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Abstract Summary PDF Supplementary Material: Objectives
Lack of physical activity has a critical effect on the physical and mental health of adolescents. This study examined the influence of family adversities on the longitudinal changes in physical inactivity among adolescents during the coronavirus disease 2019 (COVID-19) pandemic.
Methods
The study used multi-wave data from the Korean Children and Youth Panel Survey, including 2590 Korean adolescents aged 12-14 years. The longitudinal trajectory of physical inactivity among adolescents and the effects of related factors were estimated using a latent growth modeling method.
Results
Our results revealed a significant increase in physical inactivity among adolescents over time. At the onset of the pandemic, approximately one-seventh of Korean middle schoolers reported a lack of physical activity. However, 3 years later, during the quarantine, nearly one-fifth of these adolescents reported a significant increase in their physical inactivity. Initially, low level parental education was predictive of adolescents’ physical inactivity, but this effect diminished over time, becoming statistically insignificant by the end of the 3-year period. Moreover, the increase in physical inactivity over the 3 years was significantly influenced by parental rejection.
Conclusions
These findings suggest that adolescents who experience parental rejection are more likely to report an increase in sedentary behaviors in contexts such as the COVID-19 pandemic.; Summary

Korean summary
본 연구는 팬데믹 기간 동안 청소년의 신체 활동 변화와 신체 활동 부족에 대한 부정적 가정 환경의 영향을 조사했다. 한국 청소년 2,590명을 대상으로 한 3년간의 종단 패널 데이터를 잠재 성장 모형으로 분석하여 신체 활동 부족의 변화를 추적하였다. 그 결과, 팬데믹 기간 동안 청소년들의 신체 활동 부족이 현저히 증가했으며, 부모의 거부가 이러한 증가에 유의한 영향을 미친 것으로 나타났다.

Key Message
This study examined the impact of family adversities on the longitudinal changes in physical inactivity among 2,590 Korean adolescents during the COVID-19 pandemic. Over the 3-year period, physical inactivity increased significantly, with parental rejection playing a key role in this rise. While low parental education initially predicted higher levels of inactivity, its influence diminished over time.

Predictors and Prevalence of Alcohol and Cannabis Co-use Among Filipino Adolescents: Evidence From a School-based Student Health Survey: Yusuff Adebayo Adebisi, Don Eliseo Lucero-Prisno III, Jerico B. Ogaya, Victor C. Cañezo Jr., Roland A. Niez, Florante E. Delos Santos, Melchor M. Magramo, Ann Rosanie Yap-Tan, Francis Ann R. Sy, Omar Kasimieh; J Prev Med Public Health. 2024;57(3):288-297. Published online May 9, 2024; DOI: https://doi.org/10.3961/jpmph.24.052

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Abstract Summary PDF

Objectives
This study explored the prevalence and predictors of alcohol and cannabis co-use among 9263 Filipino adolescents, using data from the 2019 Global School-based Student Health Survey (GSHS).
Methods
We conducted a cross-sectional secondary analysis of the GSHS, targeting adolescents aged 13-17 years and excluding cases with incomplete data on alcohol and cannabis use. Our analysis employed the bivariate chi-square test of independence and multivariable logistic regression using Stata version 18 to identify significant predictors of co-use, with a p-value threshold set at 0.05.
Results
The weighted prevalence of co-users was 4.2% (95% confidence interval [CI], 3.4 to 5.3). Significant predictors included male sex (adjusted odds ratio [aOR], 4.50; 95% CI, 3.31 to 6.10; p<0.001) and being in a lower academic year, specifically grade 7 (aOR, 4.08; 95% CI, 2.39 to 6.99; p<0.001) and grade 8 (aOR, 2.20; 95% CI, 1.30 to 3.72; p=0.003). Poor sleep quality was also a significant predictor (aOR, 1.77; 95% CI, 1.29 to 2.44; p<0.001), as was a history of attempted suicide (aOR, 5.31; 95% CI, 4.00 to 7.06; p<0.001). Physical inactivity was associated with lower odds of co-use (aOR, 0.45; 95% CI, 0.33 to 0.62; p<0.001). Additionally, non-attendance of physical education classes (aOR, 1.48; 95% CI, 1.06 to 2.05; p=0.021), infrequent unapproved parental checks (aOR, 1.37; 95% CI, 1.04 to 1.80; p=0.024), and lower parental awareness of free-time activities (aOR, 0.63; 95% CI, 0.45 to 0.87; p=0.005) were associated with higher odds of co-use. Factors not significantly linked to co-use included age group, being in grade 9, always feeling lonely, having no close friends, being bullied outside school, and whether a parent or guardian understood the adolescent’s worries.
Conclusions
The findings highlight the critical need for comprehensive interventions in the Philippines, addressing not only physical inactivity and parental monitoring but also focusing on sex, academic grade, participation in physical education classes, sleep quality, and suicide attempt history, to effectively reduce alcohol and cannabis co-use among adolescents.

Summary

Key Message
This cross-sectional study examines the prevalence and key predictors of alcohol and cannabis co-use among 9263 Filipino adolescents using data from the 2019 Global School-based Student Health Survey. Significant predictors of co-use include male sex, lower academic grade, poor sleep quality, history of attempted suicide, physical inactivity, non-attendance in physical education classes, infrequent parental checks, and low parental awareness of adolescents' activities, with a weighted co-use prevalence of 4.2%. The study underscores the need for comprehensive interventions addressing these factors to reduce substance co-use among Filipino adolescents.

Citations

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Emotional intelligence and risk-taking engagement among adolescents: Basis for a behavioral intervention framework
Jun P. Dalisay, Emelyn R. Villanueva, Erwin T. Novo, Jacquelyn Rose A. Fajilagutan, Charry M. Sison, Liza F. Lagade, Marwin D. Sarandin
Multidisciplinary Reviews.2026; 9(9): 2026445. CrossRef
Comparing self-rated health among exclusive e-cigarette users and traditional cigarette smokers: an analysis of the Health Survey for England 2019
Yusuff Adebayo Adebisi, Duaa Abdullah Bafail
Internal and Emergency Medicine.2025; 20(2): 441. CrossRef
Self-rated health differences between exclusive e-cigarette users and exclusive cigarette smokers: evidence from the 2017–2019 Scottish Health Survey
Yusuff Adebayo Adebisi, Don Eliseo Lucero-Prisno, Isaac Olushola Ogunkola
Internal and Emergency Medicine.2025; 20(3): 771. CrossRef
Prevalence, drug education, and other associated factors of current illicit drug use among a nationally representative sample of school-aged adolescents in the Philippines in 2019
Supa Pengpid, Karl Peltzer, Lyndon Esconde Santos, Earl Francis Infante Mallari
Substance Abuse Treatment, Prevention, and Policy.2025;[Epub] CrossRef
Prevalence Rates, Perceptions of Risk, and Motivations for Nonmedical Cannabis Use in Pediatric Pain
Joe Kossowsky, Christine Greco, Bridget A. Nestor, Camila Koike, Nicole Tacugue, Andreas M. Baumer, Elissa R. Weitzman
JAMA Network Open.2025; 8(5): e2512870. CrossRef
Sleep Disturbances Across the Addiction Stages: A Review of Alcohol, Cannabis and their Co-Use
Claudia B. Padula, Ariel Grayson, Sarah Izabel, Lea-Tereza Tenekedjieva, Emma Zhang, Andrea N. Goldstein-Piekarski
Current Addiction Reports.2025;[Epub] CrossRef
Prevalence, demographic, socio-economic, and lifestyle factors associated with cigarette, e-cigarette, and dual use: evidence from the 2017–2021 Scottish Health Survey
Yusuff Adebayo Adebisi, Duaa Abdullah Bafail, Oluwatobi Ebenezer Oni
Internal and Emergency Medicine.2024; 19(8): 2151. CrossRef

Sleep Duration, Comorbidities, and Mortality in Korean Health Examinees: A Prospective Cohort Study: Sukhong Min, Woo-Kyoung Shin, Katherine De la Torre, Dan Huang, Hyung-Suk Yoon, Aesun Shin, Ji-Yeob Choi, Daehee Kang; J Prev Med Public Health. 2023;56(5):458-466. Published online September 26, 2023; DOI: https://doi.org/10.3961/jpmph.23.311

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Abstract Summary PDF Supplementary Material

Objectives
The association between long sleep duration and mortality is frequently attributed to the confounding influence of comorbidities. Nevertheless, past efforts to account for comorbidities have yielded inconsistent outcomes. The objective of this study was to evaluate this relationship using a large prospective cohort in Korea.
Methods
The study included 114 205 participants from the Health Examinees Study, who were followed for a median of 9.1 years. A composite comorbidity score was developed to summarize the effects of 21 diseases. Using Cox proportional hazards regression, hazard ratios (HRs) and 95% confidence intervals (CIs) for all-cause, cancer, and cardiovascular mortality associated with sleep duration were estimated. These estimates were adjusted for socio-demographic factors, lifestyle factors, body mass index, and comorbidity score. Additionally, a stratified analysis by subgroups with and without comorbidities was conducted.
Results
Throughout the follow-up period, 2675 deaths were recorded. After all adjustments, an association was observed between a sleep duration of 8 hours or more and all-cause mortality (HR, 1.10; 95% CI, 1.01 to 1.20). However, no such association was detected in the stratified analysis for the subgroups based on comorbidity status.
Conclusions
Long sleep duration was found to be associated with all-cause mortality among Koreans, even after adjusting for comorbidities. Additional studies are required to explore the mechanism underlying the association between sleep duration and major causes of mortality.

Summary

Korean summary
- 한국의 대규모 코호트 자료를 이용, 긴 수면 시간과 사망률 간의 연관성이 동반 상병으로 인한 교란 효과로 인한 것인지를 검토하였다. - 수면 시간과 총 사망률, 암 사망률, 심혈관질환 사망률 간의 연관성을 확인하였고, 이 중 총 사망률과 긴 수면 시간이 동반 상병 지수로 보정 한 뒤에도 유의한 연관성을 보였다.

Key Message
Using a large prospective cohort in Korea, the association between long sleep duration and mortality was evaluated, after adjusting for the confounding influence of comorbidities. When 114,205 participants from the Health Examinees Study were followed for a median of 9.1 years, sleep duration of 8 hours or more were found to be associated with all-cause mortality (HR, 1.10; 95% CI, 1.01 to 1.20). Additional studies are required to explore the mechanism underlying the association between sleep duration and major causes of mortality.

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Imbalanced sleep increases mortality risk by 14–34%: a meta-analysis
Zoltan Ungvari, Mónika Fekete, Péter Varga, János Tibor Fekete, Andrea Lehoczki, Annamaria Buda, Ágnes Szappanos, György Purebl, Anna Ungvari, Balázs Győrffy
GeroScience.2025; 47(3): 4545. CrossRef
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BMC Public Health.2024;[Epub] CrossRef

Special Article

Cohort Study Protocol: A Cohort of Korean Atomic Bomb Survivors and Their Offspring: Seong-geun Moon, Ansun Jeong, Yunji Han, Jin-Wu Nam, Mi Kyung Kim, Inah Kim, Yu-Mi Kim, Boyoung Park; J Prev Med Public Health. 2023;56(1):1-11. Published online January 31, 2023; DOI: https://doi.org/10.3961/jpmph.22.469

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Abstract Summary PDF Supplementary Material

In 1945, atomic bombs were dropped on Hiroshima and Nagasaki. Approximately 70 000 Koreans are estimated to have been exposed to radiation from atomic bombs at that time. After Korea’s Liberation Day, approximately 23 000 of these people returned to Korea. To investigate the long-term health and hereditary effects of atomic bomb exposure on the offspring, cohort studies have been conducted on atomic bomb survivors in Japan. This study is an ongoing cohort study to determine the health status of Korean atomic bomb survivors and investigate whether any health effects were inherited by their offspring. Atomic bomb survivors are defined by the Special Act On the Support for Korean Atomic Bomb Victims, and their offspring are identified by participating atomic bomb survivors. As of 2024, we plan to recruit 1500 atomic bomb survivors and their offspring, including 200 trios with more than 300 people. Questionnaires regarding socio-demographic factors, health behaviors, past medical history, laboratory tests, and pedigree information comprise the data collected to minimize survival bias. For the 200 trios, whole-genome analysis is planned to identify de novo mutations in atomic bomb survivors and to compare the prevalence of de novo mutations with trios in the general population. Active follow-up based on telephone surveys and passive follow-up with linkage to the Korean Red Cross, National Health Insurance Service, death registry, and Korea Central Cancer Registry data are ongoing. By combining pedigree information with the findings of trio-based whole-genome analysis, the results will elucidate the hereditary health effects of atomic bomb exposure.

Summary

Korean summary
해당 연구는 한국인 원폭피해 생존자 및 그 후손에서 피폭이 건강에 미치는 영향과 그것의 유전적 영향 유무를 밝히고자 계획된 연구이다. 이 연구는 연구대상자들에 대한 건강 설문 조사, 신체계측, 가계도 조사, 유전체 조사 뿐 아니라 2차 자료 연계를 통해 폭넓고 정확한 건강 정보를 수집하고 있다. 이 연구를 통해 연구대상자들의 건강 상태 파악 및 개선에 도움이 되고자 한다.

Citations

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Inherited Trauma Across Generations: The Lived Experiences of Korean Second-Generation Atomic Bomb Survivors
Youngsub Yoon, Sihyun Park
Qualitative Health Research.2026;[Epub] CrossRef
Intergenerational effects of ionizing radiation: review of recent studies from human data (2018–2021)
A. Amrenova, C. Baudin, E. Ostroumova, J. Stephens, R. Anderson, D. Laurier
International Journal of Radiation Biology.2024; 100(9): 1253. CrossRef
Cohort study profile: a cohort of Korean atomic bomb survivors and their offspring
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Original Articles

Social Contact Patterns Associated With Tuberculosis: A Case-control Study in Southwest Iran: Neda Amoori, Bahman Cheraghian, Payam Amini, Seyed Mohammad Alavi; J Prev Med Public Health. 2022;55(5):485-491. Published online September 30, 2022; DOI: https://doi.org/10.3961/jpmph.22.335

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Abstract PDF Supplementary Material

Objectives
Tuberculosis (TB) is a major public health concern worldwide. Social contact patterns can affect the epidemiology and risk of airborne diseases such as TB. This study was designed to investigate the social contact patterns associated with TB.
Methods
In this case-control study, groups of participants with and without TB were matched by age and sex. Participants reported the nature, location, frequency, and average duration of social contacts over 1 month. The duration and number of social and spatial contacts were compared between groups using the chi-square test and the t-test. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to quantify the relationship between social contact time and TB status. Data were analyzed using Stata version 11 statistical software. A p-value of <0.05 was considered to indicate statistical significance.
Results
In this study, 80 patients with TB and 172 control participants were included, and a total of 3545 social contacts were registered. Social contact with family members (OR, 1.72; 95% CI, 1.10 to 2.40), contact with a person with TB (OR, 1.53; 95% CI, 1.16 to 2.01), and contact at the participant’s home (OR, 1.42; 95% CI, 1.19 to 1.82) were significantly associated with TB status.
Conclusions
The duration of long-term social contact, rather than the number of contacts, may be the main contact-related factor associated with TB transmission in this population. The focus of contact-tracing efforts should be on finding and treating both family members and long-term contacts in non-household settings.

Summary

Citations

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Prevalence of Mycobacterium tuberculosis and risk factors among internally and externally displaced populations in northwestern Ethiopia: The case of Dabat and Metema
Deresse Daka, Belay Tessema, Awelani Mutshembele, Amir Alelign, Wubet Birhan, Baye Gelaw
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Structured tb risk factors in regions with low and high population density
Zinaida M. Zagdyn, A. B. Zudin, N. V. Kobesov, T. P. Vasileva, A. S. Galoyan, E. V. Verbitskaya
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The Korea Cohort Consortium: The Future of Pooling Cohort Studies: Sangjun Lee, Kwang-Pil Ko, Jung Eun Lee, Inah Kim, Sun Ha Jee, Aesun Shin, Sun-Seog Kweon, Min-Ho Shin, Sangmin Park, Seungho Ryu, Sun Young Yang, Seung Ho Choi, Jeongseon Kim, Sang-Wook Yi, Daehee Kang, Keun-Young Yoo, Sue K. Park; J Prev Med Public Health. 2022;55(5):464-474. Published online September 12, 2022; DOI: https://doi.org/10.3961/jpmph.22.299

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Abstract Summary PDF Supplementary Material

Objectives
We introduced the cohort studies included in the Korea Cohort Consortium (KCC), focusing on large-scale cohort studies established in Korea with a prolonged follow-up period. Moreover, we also provided projections of the follow-up and estimates of the sample size that would be necessary for big-data analyses based on pooling established cohort studies, including population-based genomic studies.
Methods
We mainly focused on the characteristics of individual cohort studies from the KCC. We developed “PROFAN”, a Shiny application for projecting the follow-up period to achieve a certain number of cases when pooling established cohort studies. As examples, we projected the follow-up periods for 5000 cases of gastric cancer, 2500 cases of prostate and breast cancer, and 500 cases of non-Hodgkin lymphoma. The sample sizes for sequencing-based analyses based on a 1:1 case-control study were also calculated.
Results
The KCC consisted of 8 individual cohort studies, of which 3 were community-based and 5 were health screening-based cohorts. The population-based cohort studies were mainly organized by Korean government agencies and research institutes. The projected follow-up period was at least 10 years to achieve 5000 cases based on a cohort of 0.5 million participants. The mean of the minimum to maximum sample sizes for performing sequencing analyses was 5917-72 102.
Conclusions
We propose an approach to establish a large-scale consortium based on the standardization and harmonization of existing cohort studies to obtain adequate statistical power with a sufficient sample size to analyze high-risk groups or rare cancer subtypes.

Summary

Korean summary
한국 코호트 컨소시엄(KCC)은 “2015년 한국의 생활 습관 및 환경 요인에 따른 암 기여분율” 프로젝트의 3단계 과업으로써, 본 프로젝트에 참여한 기존의 구축된 개인 코호트 연구의 연구자들을 주도로 다수의 대규모 한국 코호트 연구를 기반으로 구성되었다. 따라서 본 연구는 KCC에 포함된 한국 코호트 연구를 소개하는 것을 목표로 하였다. 또한 여러 기 확립된 국제 컨소시엄을 기반으로 빅데이터 기반 코호트 풀링 연구의 중요성을 제시하였다.

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Special Article

Cohort Profile: Korean Tuberculosis and Post-Tuberculosis Cohort Constructed by Linking the Korean National Tuberculosis Surveillance System and National Health Information Database: Dawoon Jeong, Hee-Yeon Kang, Jinsun Kim, Hyewon Lee, Bit-Na Yoo, Hee-Sun Kim, Hongjo Choi; J Prev Med Public Health. 2022;55(3):253-262. Published online April 22, 2022; DOI: https://doi.org/10.3961/jpmph.21.635

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We aimed to review the current data composition of the Korean Tuberculosis and Post-Tuberculosis Cohort, which was constructed by linking the Korean Tuberculosis Surveillance System (KNTSS; established and operated by the Korean Disease Control and Prevention Agency since 2000) and the National Health Information Database (NHID; established by the National Health Insurance Service in 2012). The following data were linked: KNTSS data pertaining to patients diagnosed with tuberculosis between 2011 and 2018, NHID data of patients with a history of tuberculosis and related diseases between 2006 and 2018, and data (obtained from the Statistics Korea database) on causes of death. Data from 300 117 tuberculosis patients (177 206 men and 122 911 women) were linked. The rate of treatment success for new cases was highest in 2015 (86.7%), with a gradual decrease thereafter. The treatment success rate for previously treated cases showed an increasing trend until 2014 (79.0%) and decreased thereafter. In total, 53 906 deaths were confirmed among tuberculosis patients included in the cohort. The Korean Tuberculosis and Post-Tuberculosis Cohort can be used to analyze different measurement variables in an integrated manner depending on the data source. Therefore, these cohort data can be used in future epidemiological studies and research on policy-effect analysis, treatment outcome analysis, and health-related behaviors such as treatment discontinuation.

Summary

Korean summary
TB Post 코호트(Korean Tuberculosis and Post-Tuberculosis Cohort)는 한국의 결핵 모니터링 및 관리에 대한 인구집단 수준에서의 새로운 근거를 마련하고자 구축한 우리나라 결핵 환자 코호트입니다. 국가 결핵감시체계의 일환으로 구축된 질병관리청의 결핵신고자료와 국민건강보험공단의 국민건강정보DB 자료, 통계청 사망원인 자료의 연계로 구축되었으며, 각 자료원이 보유한 정보를 활용하여 통합적인 결핵 환자 연구가 가능할 것으로 기대하고 있습니다. 결핵의 정책 효과 연구뿐만 아니라, 치료 성공, 실패, 중단 등 치료결과에 대한 영향 요인 및 환자들의 건강 관련 행태에 대한 역학 연구 등 향후 다양한 연구에 활용될 수 있을 것으로 기대됩니다.

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Original Articles

Trends and Spatial Pattern Analysis of Dengue Cases in Northeast Malaysia: Afiqah Syamimi Masrani, Nik Rosmawati Nik Husain, Kamarul Imran Musa, Ahmad Syaarani Yasin; J Prev Med Public Health. 2022;55(1):80-87. Published online January 6, 2022; DOI: https://doi.org/10.3961/jpmph.21.461

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