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Table 1 Distribution of selected characteristics in 1741 women, KOMCHS, Japan

From: Employment, income, and education and prevalence of depressive symptoms during pregnancy: the Kyushu Okinawa Maternal and Child Health Study

Variable Mean ± SD or n(%)
Age, years, mean ± SD 31.2 ± 4.4
Gestation, weeks, mean ± SD 18.5 ± 5.4
Region of residence  
 Fukuoka Prefecture 969 (55.7)
 Other than Fukuoka Prefecture in Kyushu 590 (33.9)
 Okinawa Prefecture 182 (10.5)
Number of children  
 0 700 (40.2)
 1 689 (39.6)
 ≥ 2 352 (20.2)
Nuclear family structurea 1471 (84.5)
History of depression 82 (4.7)
Family history of depression 174 (10.0)
Having ever smoked 562 (32.3)
Ever experiencing secondhand smoke exposure at home 1313 (75.4)
Ever experiencing secondhand smoke exposure at work 1103 (63.4)
  1. a Family consisting of parents and their children.