|
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)
|
