Japan Environment and Children’s Study (JECS)
JECS investigates the environmental factors affecting children's health and development in Japan. The study recruited participants from 15 areas in Japan, namely Hokkaido, Koshin, Miyagi, Toyama, Kyoto, Fukushima, Hyogo, Chiba, Tottori, Fukuoka, Kanagawa, Aichi, Osaka, Kochi and Southern Kyushu. Recruited participants were able to speak Japanese, resident in one of the 15 study areas, and expected to reside in Japan for the foreseeable future with an expected delivery date between August 2011 and August 2014. At baseline, over 100,000 pregnant women participated in the study resulting in over 100,000 babies. Over 51,000 male partners also provided information to study in prenatal data collection sweeps.
Study design
Cohort - primary caregiver and child, Cohort - birth
Number of participants at first data collection
100,148 (babies)
100,778 (pregnant women)
51,402 (male partners)
Age at first data collection
Varied (pregnant women)
Birth (babies)
Varied (male partners)
Participant year of birth
2011 - 2014 (babies)
Varied (pregnant women)
Varied (male partners)
Participant sex
All
Representative sample at baseline?
No
Sample features
Country
Year of first data collection
2011
Primary Institutions
Asahikawa Medical University (旭川医科大学, AMU)
Chiba University (千葉大学)
Doshisha University (同志社大学)
Fukushima Medical University (福島県立医科大学)
Hokkaido University (北海道大学, Hokkaidō daigaku)
Profile paper DOI
Funders
Ministry of the Environment (環境省)
Ongoing?
Yes
Data types collected
- Activity log (e.g. food, sleep, exercise)
- Interview – face-to-face
- Interview – phone
- Physical environment assessment (e.g. pollution, mould)
- Physical or biological assessment (e.g. blood, saliva, gait, grip strength, anthropometry)
- Secondary data
- Self-report questionnaire – paper or computer assisted
- None
- None
- Healthcare data
Engagement
Keywords
