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Journal of Epidemiology
Scopus
ISSN 0917-5040 · Japan Epidemiological Association · 953 articles in the index
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Journal Article
Reading Books Helps Children in Poverty Become More Resilient: Results From a Population-based Longitudinal Study in Japan
Background: Resilience is an important ability in reducing subsequent health risks from poverty. This study aimed to examine whether reading books in fourth grade boosts resilience in sixth grade and whether poverty status modifies the association. Methods: We used a part of longitudinal data from…
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Journal Article
Study Profile of the Iwate PGS Assessment and Risk Communication (PARC) Study
Background: The potential impacts of polygenic scores (PGS) on health-behavior changes are not fully understood. The Iwate PGS Assessment and Risk Communication Study aims to investigate the effects of reporting PGS-based risk for ischemic stroke on health behaviors. Methods: Participants wishing…
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Journal Article
What Drives Respondents to Seroepidemiological Surveys? Insights From COVID-19 and Implications for Future Pandemics
Background: Non-random participation can undermine the representativeness of seroepidemiological surveys. Despite their critical role in estimating disease spread during pandemics, non-response bias and methods to correct it require further investigation. This study aimed to examine…
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Journal Article
Validity of a Self-administered Food Frequency Questionnaire for Assessing Carotenoid Intakes Using Serum Biomarkers in Japan: The Tohoku Medical Megabank Project
Background: More research is needed to clarify the health effects of dietary carotenoid intakes, and this requires the use of high-quality assessments of habitual dietary intake. Cohort studies from the Tohoku Medical Megabank Organization included a self-administered food frequency questionnaire…
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Journal Article
SARS-CoV-2 Cumulative Infection Over the Pandemic and Its Associated Factors Among Healthcare Workers in Japan
Introduction: Evidence is scarce on cumulative severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections among healthcare workers during the pandemic. This study aimed to describe cumulative infections, including undiagnosed cases, and identify factors associated with infection in…
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Journal Article
Association Between Older Drivers’ Signs and Motor Vehicle Crashes in Japan
Background: Encouraging older drivers to display the older drivers’ sign is one of the unique traffic safety policies for older drivers in Japan. The sign has been discussed in light of ageism, but the potential merit of displaying it has not been investigated. Methods: Using nationwide…
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Journal Article
Moderate-to-vigorous Physical Activity and Total and Site-specific Cancer: The Japan Public Health Center-based Prospective Study
Background: A World Health Organization guideline recommends that adults engage in moderate-to-vigorous physical activity (MVPA). We aimed to clarify associations of total MVPA in any domain with overall and site-specific cancer incidence using Japanese population-based cohort data. Methods: This…
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Journal Article
Secular Trends in the Prevalence of Small Vulnerable Newborns in Japan, 1997–2021
Background: In 2023, a collaborative United Nations Children’s Fund–World Health Organization group introduced the concept of small vulnerable newborns (SVNs) to improve the identification of newborns at increased risk of adverse outcomes and to guide more effective preventive strategies. However…
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Journal Article
The Claims Data Learning & Enhancing for Algorithm Refinement (CLEAR) Study: Overview of the Study Design and Baseline Profile
Medical claims data are increasingly used in epidemiological studies but are inadequately validated to ensure their reliability in identifying diseases. We developed the Claims data Learning & Enhancing for Algorithm Refinement (CLEAR) Study as a database platform to enable the systematic, low-cost…
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Journal Article
Longitudinal Study of Changes in Daily and Hourly Steps During the COVID-19 Pandemic in Japan
Background: The impact of the coronavirus disease 2019 (COVID-19) pandemic on changes in physical activity, particularly diurnal patterns, remains unclear. We investigated temporal changes in daily steps before and after the emergency declaration in Japan during the COVID-19 pandemic. Methods…
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Journal Article
Validation of Recorded Diagnoses of Acute Kidney Injury Among Surgical Patients in the Japanese Diagnosis Procedure Combination Database
Background: Researchers widely use the Diagnosis Procedure Combination (DPC) database for studies on acute-care hospitalization in Japan. However, the validity of acute kidney injury (AKI) diagnostic codes among patients who underwent surgery under general anesthesia is unclear. Methods: Under the…
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Journal Article
Financial Performance of Medical Corporations in Japan From 2016 to 2022: A Nationwide Longitudinal Analysis
Background: Medical corporations (Iryohoujin) are central to Japan’s healthcare delivery, yet their financial conditions have not been comprehensively assessed nationwide. This study aimed to describe financial trends and structural characteristics of hospital-operating corporations from fiscal…
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Journal Article
Association Between Family Structure and Obesity Among Korean Adolescents
Background: In Korea, grandparents often play a crucial role in childrearing. Therefore, this study investigated the association between family structure and obesity among Korean adolescents. Methods: Data were analyzed from 3,328 adolescents (1,783 male adolescents and 1,545 female adolescents…
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Journal Article
Cohort Profile: The Community Empowerment and Care for Well-being and Healthy Longevity Study
The Community Empowerment and Care for Well-being and Healthy Longevity (CEC) Study is an ongoing, multigenerational, population-based cohort designed to evaluate community-driven lifespan developmental care in a rapidly aging society. Conducted in Village T, Aichi Prefecture, Japan, whose…
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Journal Article
Validation of the Diagnosis Procedure Combination Database in Japan for ICU Research: A Multicenter Comparison With the Japanese Intensive care PAtient Database (JIPAD)
Background: The Diagnosis Procedure Combination (DPC) database is Japan’s most widely used administrative inpatient dataset supporting epidemiological and health services research. While its validity is established for various diagnoses and procedures, accuracy for intensive care unit (ICU)…
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Journal Article
Healthcare Providers’ Advice for Tobacco Cessation and Its Association With Quit Attempts: A Cross-sectional Study in Japan, 2024
Background: Despite guideline recommendations to deliver cessation advice, implementation in Japan remains inconsistent. We examined tobacco use prevalence, receipt of healthcare providers’ advice, and its association with quit attempts. Methods: We analyzed the 2024 wave of a nationwide web-based…