Questionnaire results on exposure characteristics of pregnant women participating in the Japan Environment and Children Study (JECS).

ABSTRACT:

Background

The Japan Environment and Children's Study (JECS) is a nation-wide birth cohort study investigating environmental effects on children's health and development. In this study, the exposure characteristics of the JECS participating mothers were summarized using two questionnaires administered during pregnancy.

Methods

Women were recruited during the early period of their pregnancy. We intended to administer the questionnaire during the first trimester (MT1) and the second/third trimester (MT2). The total number of registered pregnancies was 103,099.

Results

The response rates of the MT1 and MT2 questionnaires were 96.8% and 95.1%, respectively. The mean gestational ages (SDs) at the time of the MT1 and MT2 questionnaire responses were 16.4 (8.0) and 27.9 (6.5

SUBMITTER: Iwai-Shimada M 

PROVIDER: S-EPMC6138908 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature