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

Japan Environment and Children's Study Group

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Background: 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. Methods: 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. Results: 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. Conclusions: 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.

Original languageEnglish
Pages (from-to)452-458
Number of pages7
JournalJournal of Epidemiology
Volume25
Issue number6
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Pregnant Women
Japan
Parturition
Mothers
First Pregnancy Trimester
Gravidity
Population
Pregnancy
Local Government
Anthropometry
Health Occupations
Environmental Exposure
Third Pregnancy Trimester
Live Birth
Second Pregnancy Trimester
Parity
Birth Weight
Social Class
Gestational Age
Obstetrics

Keywords

  • Birth cohort
  • Children
  • Environmental chemicals
  • Japan
  • Pregnant women

ASJC Scopus subject areas

  • Epidemiology

Cite this

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. / Japan Environment and Children's Study Group.

In: Journal of Epidemiology, Vol. 25, No. 6, 2015, p. 452-458.

Research output: Contribution to journalArticle

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title = "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",
abstract = "Background: 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. Methods: 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. Results: 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. Conclusions: 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.",
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author = "{Japan Environment and Children's Study Group} and Takehiro Michikawa and Hiroshi Nitta and Nakayama, {Shoji F.} and Masaji Ono and Junzo Yonemoto and Kenji Tamura and Eiko Suda and Hiroyasu Ito and Ayano Takeuchi and Toshihiro Kawamoto and Hirohisa Saito and Reiko Kishi and Nobuo Yaegashi and Koichi Hashimoto and Seiji Yasumura and Chisato Mori and Fumiki Hirahara and Zentaro Yamagata and Hidekuni Inadera and Michihiro Kamijima and Ikuo Konishi and Hiroyasu Iso and Masayuki Shima and Munetsugu Fukumoto and Narufumi Suganuma and Toshiro Hara and Takahiko Katoh",
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T1 - The Japan Environment and Children's Study (JECS)

T2 - A preliminary report on selected characteristics of approximately 10 000 pregnant women recruited during the first year of the study

AU - Japan Environment and Children's Study Group

AU - Michikawa, Takehiro

AU - Nitta, Hiroshi

AU - Nakayama, Shoji F.

AU - Ono, Masaji

AU - Yonemoto, Junzo

AU - Tamura, Kenji

AU - Suda, Eiko

AU - Ito, Hiroyasu

AU - Takeuchi, Ayano

AU - Kawamoto, Toshihiro

AU - Saito, Hirohisa

AU - Kishi, Reiko

AU - Yaegashi, Nobuo

AU - Hashimoto, Koichi

AU - Yasumura, Seiji

AU - Mori, Chisato

AU - Hirahara, Fumiki

AU - Yamagata, Zentaro

AU - Inadera, Hidekuni

AU - Kamijima, Michihiro

AU - Konishi, Ikuo

AU - Iso, Hiroyasu

AU - Shima, Masayuki

AU - Fukumoto, Munetsugu

AU - Suganuma, Narufumi

AU - Hara, Toshiro

AU - Katoh, Takahiko

PY - 2015

Y1 - 2015

N2 - Background: 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. Methods: 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. Results: 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. Conclusions: 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.

AB - Background: 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. Methods: 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. Results: 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. Conclusions: 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.

KW - Birth cohort

KW - Children

KW - Environmental chemicals

KW - Japan

KW - Pregnant women

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