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Table 1 Description of participants, including the whole sample, participants with no preeclampsia and participants with preeclampsia

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

  Whole sample (n = 550) No preeclampsia (n = 525) Preeclampsia (n = 25) p-valuea,b,c
Age, years 28.0 (4.4) 28.0 (4.3) 29.4 (4.6) 0.116
Gestational age at inclusion 108 (17) 108 (17) 106 (20) 0.607
Belonging to intervention group, % 49.8 50.3 40.0 0.424
Smoking, % 3.8 3.8 4.0 1.0
Gestational diabetes, diet-regulated, % 8.4 8.4 8.0 0.862
Gestational diabetes, insulin, % 1.1 1.1 0.0
Pregnancy duration, weeks 40 (39–41) 40 (39–41) 38 (36–39) < 0.001
% instrumental delivery 21.5 19.8 60.9 < 0.001
Education
 3-year high school or less 30.8 30.8 32.0 0.523
 University/university college less than 4 years 33.8 34.2 24.0
 University/university college more than 4 years 35.4 35.0 44.0
  1. aFor normally distributed data, Independent-samples t-test was used with values presented as mean (SD). b For non-normally distributed data, Mann–Whitney U-test was used and values given as median (Q1–Q3). c For categorical variables, Chi square test was performed, and values given in percent