Table I.
Summary of the maternal and newborn characteristics of subjects with or without preeclampsia
| Non-PE (N = 197) | PE (N = 58) | P values from Kruskal–Wallis or chi-square testa | |
|---|---|---|---|
| Mean ± SD or N (%) | Mean ± SD or N (%) | ||
| Maternal age (years) | 30.2±6.2 | 30.4±6.1 | 0.69 |
| Parity | |||
| First | 82 (46.1) | 35 (70) | 0.033 |
| Second | 57 (32.0) | 7 (14) | |
| Third | 24 (13.5) | 4 (8) | |
| Fourth and over | 15 (8.4) | 4 (8) | |
| Unknown | 19 | 8 | |
| Gestational age (weeks) | 39.6±1.1 | 36.1±2.4 | 0.0001 |
| Newborn gender | |||
| Male | 98 (49.8) | 33 (56.9) | 0.34 |
| Female | 99 (50.2) | 25 (43.1) | |
| Parents’ ethnicity | |||
| Both Caucasian | 111 (56.9) | 30 (52.6) | 0.22 |
| Both African-American | 33 (16.9) | 9 (15.8) | |
| Both Asian | 26 (13.3) | 4 (7.0) | |
| Both Hispanic | 18 (9.2) | 10 (17.5) | |
| Other | 7 | 4 | |
| Unknown | 2 | 1 | |
| Newborn birth weight (g) | 3374.9±493.3 | 2605.9±767.0 | 0.0001 |
| Umbilical cord blood volume (ml)a | 97.6±28.5 | 81.9±26.8 | 0.0001 |
For continuous variables mean ± standard deviation (SD); for categorical variables N (%).
aKruskal–Wallis test was used for the comparisons between non-PE and PE samples on continuous variables (mother’s age, gestation duration, newborn birth weight and umbilical cord blood volume) and chi-square test for categorical variables (parity, newborn gender and parents’ ethnicity).
bIncludes 35ml of citrate phosphate dextrose anticoagulant.