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Table 1 Maternal Risk Factors

From: Obstetric prognosis in sisters of preeclamptic women – implications for genetic linkage studies

  reference group unaffected sisters of preeclamptic index patients affected sisters of preeclamptic index patients
risk factor N = 530 N = 63 N = 42
Age < 18 years 14 (2.64%) 2 (3.17%) 1 (2.38%)
Age > 35 years 11 (2.08%) 0 P = 0.617a 0 P = 1.00a
Miscarriage 39 (7.34%) 4 (6.35%) P = 1.00a 5 (11.90%) P = 0.358a
Pregravid body mass index > 25 73 (13.73%) 4 (6.78%) P = 0.134 10 (22.5%) P = 0.129
Unemployed 74 (13.94 %) 7 (11.11 %) P = 0.537 2 (4.76 %) P = 0.092
Not married 244 (46.04%) 21 (33.33%) P = 0.055 14 (33.33%) P = 0.111
IUD before pregnancy 4 (0.75 %) 0 P = 1.00a 0 P = 1.00a
Infertility 27 (5.09 %) 2 (3.17 %) P = 0.758a 3 (7.14 %) P = 0.476a
Smoking (> 5 cigarettes/day) 49 (9.23 %) 2 (3.17 %) P = 0.105 1 (2.38 %) P = 0.162a
Alcohol consumption 17 (3.20 %) 0 P = 0.240a 1 (2.38 %) P = 1.00a
Maternal diabetes 7 (1.32 %) 1 (1.59 %) P = 0.594a 0 P = 1.00a
Chronic illness 25 (4.71 %) 3 (4.76 %) P = 1.00a 1 (2.38 %) P = 0.712a
  1. a Fisher's exact test