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Table 3 Black subgroup demographic and clinical characteristics

From: Variation in endoglin pathway genes is associated with preeclampsia: a case–control candidate gene association study

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) < 0.001 a
Birthweight, grams (M (SD)) 2313.9 (715.8) 3388.8 (405.3) < 0.001 b
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) < 0.001 b
Avg. DBP in labor, mm Hg (M (SD)) e 97.1 (10.4) 72.6 (7.4) < 0.001 d
Pre-pregnancy BMI (Mdn (min-max)) f 23.0 (17.7-38.4) 25.8 (19.4-49.9) 0.25a
  1. 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.
  2. a Mann–Whitney U test.
  3. b Independent samples t-test with unequal variances.
  4. c n = 24 cases & n = 29 controls.
  5. d Independent samples t-test.
  6. e n = 30 cases & n = 29 controls.
  7. f n = 27 cases & n = 30 controls.