Table 1 Maternal characteristic among the four paternal categories: United States, 1995–2001
Completeness of paternal characteristics | ||||
|---|---|---|---|---|
Maternal Characteristics | Complete (%) n = 22,221,335 | Age missing (%) n = 212,474 | Race missing (%) n = 311,938 | Both missing (%) n = 3,590,802 |
Age (years) | ||||
<20 | 9.3 | 23.8 | 17.9 | 31.6 |
20–24 | 23.2 | 31.0 | 28.9 | 35.3 |
25–29 | 28.8 | 21.5 | 23.7 | 17.7 |
30–34 | 25.0 | 14.4 | 18.1 | 9.5 |
≥35 | 13.7 | 9.2 | 11.4 | 5.9 |
Education | ||||
<12 | 18.3 | 47.0 | 31.7 | 44.1 |
12 | 31.9 | 34.2 | 36.3 | 38.4 |
13–15 | 23.4 | 13.6 | 18.7 | 14.3 |
≥16 | 26.5 | 5.2 | 13.3 | 3.2 |
Race | ||||
White | 83.9 | 70.3 | 77.8 | 54.0 |
Black | 11.0 | 25.0 | 17.1 | 42.2 |
Others | 5.1 | 4.8 | 5.2 | 3.8 |
Prenatal care began | ||||
1st trimester | 84.0 | 63.0 | 71.6 | 61.7 |
2nd trimester | 11.2 | 22.6 | 16.1 | 24.1 |
3rd trimester | 2.1 | 6.2 | 3.6 | 6.4 |
No care | 0.7 | 3.3 | 1.4 | 3.8 |
Missing | 2.0 | 4.9 | 7.3 | 4.0 |
Primiparity | 32.3 | 36.7 | 37.9 | 40.7 |
Unmarried status | 22.1 | 73.1 | 55.5 | 96.5 |
Smoking | ||||
Yes | 9.2 | 16.3 | 14.2 | 19.8 |
No | 72.6 | 48.9 | 70.5 | 71.3 |
Missing | 18.2 | 34.8 | 15.2 | 8.9 |