Table 1

Characteristics of pregnant women and their offspring (n=82 877)

Characteristicsn%
Number of coexist disease
 054 53565.8
 125 34130.6
 ≥230013.6
Mother age at birth
 <2478159.4
 25–2922 72127.4
 30–3429 55535.7
 35–3918 94022.9
 ≥4038464.6
Parity
 036 30243.8
 130 64637.0
 ≥215 92919.2
Mother education
 Junior high school36304.4
 High school25 91731.3
 Vocational junior or technical college35 32342.6
 ≥University18 00721.7
Maternal smoking habits
 Non-smoking or exit-smoking before pregnancy68 14582.2
 Exit-smoking after pregnancy11 32413.7
 Still-smoking34084.1
Maternal drinking habits
 Non-drinker41 48150.1
 Exit drinking after pregnancy39 14347.2
 Drinking22532.7
Annual household income (1000 JPY)
 <20041935.1
 200–39928 47634.4
 400–59928 66334.6
 600–79913 04515.7
 800–99952336.3
 1000–119918702.3
 1200–14997350.9
 1500–19994270.5
 ≥20002350.3
Child sex
 Boys42 56351.4
 Girls40 31448.6