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Table 2 White 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 = 181) Controls (n = 174) p-value
Maternal age, years (M (SD)) 28.3 (5.8) 28.4 (5.7) 0.87a
Gravida (Mdn (min-max)) 1 (1-6) 1 (1-8) 0.08b
Nulliparous (n, %) 146 (80.7%) 139 (79.9%) 0.85c
Gestational age at delivery, wks (M (SD)) 36.1 (3.2) 39.6 (1.1) < 0 .001 d
Birthweight, grams (M (SD)) e 2497.5 (841.2) 3481.6 (446.3) < 0.001 d
Avg. SBP < 20 weeks’, mm Hg (M (SD)) f 116.6 (9.6) 112.1 (7.5) < 0.001 d
Avg. DBP < 20 weeks’, mm Hg (M (SD)) f 71.7 (7.2) 68.1 (4.9) < 0.001 d
Avg. SBP in labor, mm Hg (M (SD)) g 154.8 (13.9) 120.4 (10.2) < 0.001 d
Avg. DBP in labor, mm Hg (M (SD)) h 92.6 (8.0) 72.3 (7.2) < 0. 001 a
Pre-pregnancy BMI (Mdn (min-max)) i 25.8 (17-46) 22.9 (16-37) < 0.001 b
  1. Abbreviations: (M (SD)), mean (standard deviation); (Mdn (min-max)), median (minimum-maximum); wks, weeks; Avg. SBP, average systolic blood pressure; mmHg, millimeters of mercury; Avg. DBP, average diastolic blood pressure; BMI, body mass index.
  2. a Independent samples t-test.
  3. b Mann–Whitney U test.
  4. c χ2 test of independence.
  5. d Independent samples t-test with unequal variance.
  6. e Outlier removed in controls.
  7. f n = 168 cases & n = 170 controls.
  8. g n = 181 cases & n = 173 controls.
  9. h n = 180 cases & n = 173 controls.
  10. i BMI values imputed for n = 22 cases, sample size n = 178 cases & n = 172 controls.