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Table 2 Pregnancy and Delivery Characteristics

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
characteristics N = 530 N = 63 N = 42
Pregnancy-induced hypertension 3 (0.57 %) 1 (1.59 %) P = 0.365a 3 (7.14 %) P < 0.001a
Placental abruption 2 (0.38 %) 0 P = 1.00a 1 (2.38 %) P = 0.205a
Placenta previa 4 (0.75 %) 2 (3.17 %) P = 0.126a 0 P = 1.00a
Prolonged gravidarum (>42 w) 39 (7.36 %) 6 (9.52 %) P = 0.612a 1 (2.38 %) P = 0.346a
Female fetus 261 (49.25 %) 30 (47.62 %) P = 0.807 23 (54.76 %) P = 0.491
Isoimmunization (Rh) 1 (0.19 %) 0 P = 1.00a 0 P = 1.00a
Low hemoglobin concentration (< 100 g/L) 7 (1.32 %) 0 P = 1.00a 0 P = 1.00a
Cesarean delivery 97 (18.30 %) 9 (14.29 %) P = 0.432 14 (33.33 %) P = 0.018
Forceps/vacuum 47 (8.87 %) 7 (11.11 %) P = 0.558 2 (4.76 %) P = 0.566a
Bloody amniotic fluid 11 (2.07 %) 2 (3.17 %) P = 0.638a 2 (4.76 %) P = 0.246a
Meconium-stained amniotic fluid 73 (13.75 %) 9 (14.29 %) P = 0.907 4 (9.52 %) P = 0.440
Placental/fetal mass ratio (%) 16.6 % 16.2 % P = 0.51b 17.8 % P = 0.46b
  1. a Fisher's exact test, b Student's t-test