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Table 2 Comparison of weight and weight development between women without and with preeclampsia

From: Preeclampsia and gestational weight gain in the Norwegian Fit for Delivery trial

  Total sample (n = 550) No pre-eclampsia (n = 525) Preeclampsia (n = 25) Difference p-valuea,b
Pre-pregnancy weight (kg)a 68.0 (12.1) 68.0 (12.0) 67.5 (14.6) 0.5 0.840
Pre-pregnancy BMI (kg/m2)a 23.8 (3.8) 23.8 (3.8) 24.2 (4.0) − 0.3 0.657
Normal-weight, %b 71.6 71.2 80.0   0.604
Overweight, %b 21.5 20.8 16.0  
Obese, %b 7.8 8.0 4.0  
Paternal BMI, (kg/m2)a 25.5 (3.2) 25.6 (3.2) 24.9 (3.5) 0.6 0.377
Weight gain in pregnancy, kga (from pre-pregnancy weight) 15.1 (6.1) 14.9 (6.0) 18.6 (7.1) − 3.7 0.004
Weight gain in pregnancy, kg (from weight at inclusion)a 12.7 (5.0) 12.6 (4.9) 14.8 (6.0) − 2.2 0.040*
Weight gain per week from pre-pregnancy to inclusion, gramsa 152 (196) 148 (194) 236 (217) − 88 0.031*
Weight gain per week from inclusion to week 30, gramsa 504 (214) 498 (210) 629 (279) − 131 0.005*
Weight gain per week from week 30–36, gramsa 554 (298) 547 (293) 757 (361) − 210 0.004*
Fat percentage, week 30, %a 35.4 (5.2) 35.4 (5.2) 35.0 (5.8) 0.4 0.732
Fat mass, week 30, kga 28.0 (8.5) 28.0 (8.4) 29.2 (11.6) − 1.2 0.523
Fat percentage. week 36, %a 35.5 (5.2) 35.5 (5.2) 34.6 (6.8) 1.0 0.483
Fat mass, week 36, kga 29.3 (8.8) 29.2 (8.6) 31.6 (14.6) − 2.4 0.537
Total body water, week 30, kga 36.4 (3.6) 36.3 (3.5) 38.0 (5.7) − 1.7 0.188
Total body water, week 36, %a 37.7 (3.9) 37.8 (3.8) 41.2 (5.9) − 3.5 0.040*
Excessive GWG (%)b 51.7 47.2 73.9 − 26.7 0.012*
  1. Weight gain in pregnancy (based on pre-pregnancy weight): missing = 21. Weight gain in pregnancy (based on weight at study inclusion): missing = 26. Weight gain per week from pre-pregnancy to inclusion: missing = 18
  2. Weight gain per week from inclusion to week 30: missing = 35. Weight gain from week 30 to 36: missing = 45. Fat percentage and fat mass in week 30: missing = 51. Total Body Water in week 30: missing = 49. Total Body Water in week 36: Missing = 58
  3. Excessive GWG according to Institute of Medicine 2009 [13], a total of 536 women
  4. aIndependent-samples t-test. b Chi square test. * Significance level p < 0.05