No oral contraceptive use (n = 341) | Oral contraceptive use (n = 234) | |||
---|---|---|---|---|
N | % | N | % | |
Age at childbirth | ||||
< 20 | 10 | 2.9 | 5 | 2.2 |
20–24 | 67 | 19.7 | 82 | 35.0 |
25–29 | 146 | 42.8 | 104 | 44.4 |
≥ 30 | 118 | 34.6 | 43 | 18.4 |
Education | ||||
≤ High school | 113 | 33.6 | 86 | 37.1 |
Some college | 134 | 39.9 | 114 | 49.1 |
≥ College graduate | 89 | 26.5 | 32 | 13.8 |
Missing | 5 | 2 | ||
Birth order | ||||
1 | 166 | 48.7 | 147 | 62.8 |
2 | 126 | 36.9 | 76 | 32.5 |
≥ 3 | 49 | 14.4 | 11 | 4.7 |
Menarche | ||||
≤ 11 years old | 38 | 11.3 | 39 | 16.7 |
12–15 years old | 280 | 83.3 | 183 | 78.2 |
≥ 16 years old | 18 | 5.4 | 12 | 5.1 |
Missing | 5 | 0 | ||
Smoking during pregnancy | ||||
Yes | 85 | 24.9 | 88 | 37.6 |
No | 256 | 75.1 | 146 | 62.4 |
Planned pregnancy | ||||
Yes | 234 | 68.6 | 187 | 79.9 |
Undecided | 35 | 10.3 | 16 | 6.8 |
No | 72 | 21.1 | 31 | 13.3 |