Table 3.
Black subgroup demographic and clinical characteristics
| Variable | Cases (n = 30) | Controls (n = 30) | p-value |
|---|---|---|---|
| Maternal age, years (Mdn (min-max)) |
20.0 (14-37) |
20.0 (14-37) |
0.99a |
| Gravida (Mdn (min-max)) |
1 (1-6) |
1 (1-6) |
0.38a |
| Nulliparous (n, %) |
25 (83.3%) |
25 (83.3%) |
------- |
| Gestational age at delivery, wks (Mdn (min-max)) |
36.9 (27.4-40.0) |
40.6 (37.1-42.1) |
< 0.001a |
| Birthweight, grams (M (SD)) |
2313.9 (715.8) |
3388.8 (405.3) |
< 0.001b |
| Avg. SBP < 20 weeks’, mm Hg (M (SD))c |
113.3 (9.2) |
114.4 (6.8) |
0.60d |
| Avg. DBP < 20 weeks’, mm Hg (M (SD))c |
70.4 (6.5) |
69.2 (4.2) |
0.41d |
| Avg. SBP in labor, mm Hg (M (SD))e |
159.9 (17.8) |
120.7 (9.1) |
< 0.001b |
| Avg. DBP in labor, mm Hg (M (SD))e |
97.1 (10.4) |
72.6 (7.4) |
< 0.001d |
| Pre-pregnancy BMI (Mdn (min-max))f | 23.0 (17.7-38.4) | 25.8 (19.4-49.9) | 0.25a |
Abbreviations: (Mdn (min-max)), median (minimum-maximum); wks, weeks; (M (SD)), mean (standard deviation); Avg. SBP, average systolic blood pressure; mmHg, millimeters of mercury; Avg. DBP, average diastolic blood pressure; BMI, body mass index.
a Mann–Whitney U test.
b Independent samples t-test with unequal variances.
cn = 24 cases &n = 29 controls.
d Independent samples t-test.
en = 30 cases &n = 29 controls.
fn = 27 cases &n = 30 controls.