Characteristics of pregnant women and their offspring (n=82 877)
Characteristics | n | % |
Number of coexist disease | ||
0 | 54 535 | 65.8 |
1 | 25 341 | 30.6 |
≥2 | 3001 | 3.6 |
Mother age at birth | ||
<24 | 7815 | 9.4 |
25–29 | 22 721 | 27.4 |
30–34 | 29 555 | 35.7 |
35–39 | 18 940 | 22.9 |
≥40 | 3846 | 4.6 |
Parity | ||
0 | 36 302 | 43.8 |
1 | 30 646 | 37.0 |
≥2 | 15 929 | 19.2 |
Mother education | ||
Junior high school | 3630 | 4.4 |
High school | 25 917 | 31.3 |
Vocational junior or technical college | 35 323 | 42.6 |
≥University | 18 007 | 21.7 |
Maternal smoking habits | ||
Non-smoking or exit-smoking before pregnancy | 68 145 | 82.2 |
Exit-smoking after pregnancy | 11 324 | 13.7 |
Still-smoking | 3408 | 4.1 |
Maternal drinking habits | ||
Non-drinker | 41 481 | 50.1 |
Exit drinking after pregnancy | 39 143 | 47.2 |
Drinking | 2253 | 2.7 |
Annual household income (1000 JPY) | ||
<200 | 4193 | 5.1 |
200–399 | 28 476 | 34.4 |
400–599 | 28 663 | 34.6 |
600–799 | 13 045 | 15.7 |
800–999 | 5233 | 6.3 |
1000–1199 | 1870 | 2.3 |
1200–1499 | 735 | 0.9 |
1500–1999 | 427 | 0.5 |
≥2000 | 235 | 0.3 |
Child sex | ||
Boys | 42 563 | 51.4 |
Girls | 40 314 | 48.6 |