Table 1.
Selected maternal characteristics of early-onset preeclampsia cases and controls by racial-ethnic groups, California births, 2000-2007.
| Characteristics | White | Hispanic | Black | |||
|---|---|---|---|---|---|---|
|
| ||||||
| Controls | Cases | Controls | Cases | Controls | Cases | |
| (N=916) | (N=90) | (N=709) | (N=67) | (N=738) | (N=40) | |
| Maternal age (year, mean ± SD) | 30.00 ± 4.67 | 30.22 ± 5.26 | 26.22 ± 5.72 | 28.61 ± 6.49a | 26.58 ± 5.81 | 27.20 ± 5.60 |
| ≤High school graduate (%) | 23.25 | 18.89 | 85.05 | 82.09 | 53.79 | 50.00 |
| Nulliparity (%) | 50.11 | 81.11b | 35.26 | 41.79 | 36.18 | 45.00 |
| Maternal weight (kilograms) at or near specimen collection (mean ± SD) | 70.02 ± 14.98 | 76.20 ± 17.85a | 67.22 ± 14.40 | 76.33 ± 18.98a | 78.03 ± 20.87 | 80.42 ± 21.18 |
| Gestational age at specimen collection ≥18 weeks of gestationa (%) | 15.61 | 14.44 | 25.81 | 29.85 | 27.51 | 22.50 |
| Delivery < 26 weeks of gestationa (%) | NA | 10.00 | NA | 13.43 | NA | 12.50 |
| Preeclampsia diagnosis < 26 weeks of gestationc (%) | NA | 14.44 | NA | 16.42 | NA | 15.00 |
All data are from birth certificates with the exception of gestational age.
SD, standard deviation; NA, not applicable.
a
Student t test P < 0.05 comparing cases to controls
b
Chi-square test P < 0.05 comparing cases to controls
c
Gestational age based on prenatal screening and hospital charts for cases and prenatal screening only for controls