The Japan Environment and Children’s Study (JECS): A Preliminary Report on Selected Characteristics of Approximately 10 000 Pregnant Women Recruited During the First Year of the Study

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Author(s)

    • Michikawa Takehiro
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Kawamoto Toshihiro
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies|Department of Environmental Health, University of Occupational and Environmental Health
    • Nitta Hiroshi
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Nakayama Shoji F.
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Ono Masaji
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Yonemoto Junzo
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Tamura Kenji
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Suda Eiko
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Ito Hiroyasu
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies
    • Takeuchi Ayano
    • National Center for the Japan Environment and Children’s Study, National Institute for Environmental Studies

Abstract

<b>Background: </b>The Japan Environment and Children’s Study (JECS) is an ongoing nationwide birth cohort study launched in January 2011. In this progress report, we present data collected in the first year to summarize selected maternal and infant characteristics.<BR><b>Methods: </b>In the 15 Regional Centers located throughout Japan, the expectant mothers were recruited in early pregnancy at obstetric facilities and/or at local government offices issuing pregnancy journals. Self-administered questionnaires were distributed to the women during their first trimester and then again during the second or third trimester to obtain information on demographic factors, physical and mental health, lifestyle, occupation, environmental exposure, dwelling conditions, and socioeconomic status. Information was obtained from medical records in the first trimester and after delivery on medical history, including gravidity and related complications, parity, maternal anthropometry, and infant physical examinations.<BR><b>Results: </b>We collected data on a total of 9819 expectant mothers (mean age = 31.0 years) who gave birth during 2011. There were 9635 live births. The selected infant characteristics (singleton births, gestational age at birth, sex, birth weight) in the JECS population were similar to those in national survey data on the Japanese general population.<BR><b>Conclusions: </b>Our final birth data will eventually be used to evaluate the national representativeness of the JECS population. We hope the JECS will provide valuable information on the impact of the environment in which our children live on their health and development.

Journal

  • Journal of Epidemiology

    Journal of Epidemiology 25(6), 452-458, 2015

    Japan Epidemiological Association

Codes

  • NII Article ID (NAID)
    130005074463
  • Text Lang
    ENG
  • ISSN
    0917-5040
  • Data Source
    J-STAGE 
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