Table 1 The distribution (%) of baseline maternal characteristic among three study groups
Partner information available (N = 129651) | Partner information partly missing (N = 3018) | Partner information totally missing (N = 19564) | ||
|---|---|---|---|---|
Age* | <20 y | 5.1 | 13.7 | 21.4 |
20 y- | 75.9 | 72.2 | 69.4 | |
35 y- | 19.0 | 14.1 | 9.2 | |
Race* | white | 84.0 | 69.0 | 46.1 |
Black | 12.1 | 26.3 | 51.3 | |
Other | 3.9 | 4.7 | 2.6 | |
Marital status* | Married | 82.6 | 39.0 | 4.1 |
Unmarried | 17.4 | 61.0 | 95.9 | |
Education* | <12 y | 13.1 | 28.4 | 36.1 |
12 y | 30.0 | 31.2 | 39.9 | |
13–15 y | 24.1 | 15.2 | 15.9 | |
16 y | 19.6 | 5.8 | 2.9 | |
>16 y | 13.2 | 19.4 | 5.2 | |
Cigarette smoking* | Yes | 8.1 | 14.9 | 19.1 |
No | 70.5 | 55.8 | 69.5 | |
Not available# | 21.3 | 29.4 | 11.4 | |
Prenatal care service* | Adequate | 79.4 | 55.5 | 54.1 |
Mediate | 17.8 | 37.0 | 34.6 | |
Inadequate | 2.7 | 7.5 | 11.3 | |
Place of birth* | Native | 84.5 | 72.7 | 88.1 |
Foreign | 15.5 | 27.3 | 11.9 |