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Table 1 Demographical and clinical characteristics of responders (all time points; n = 1480) and non-responders (only first time point/week 17)

From: Trajectories of maternal sleep problems before and after childbirth: a longitudinal population-based study

  Responders Non-responders P-level
  %   %   
Parity      .02
  Primipara 79.6 %   76.4 %   
  Multipara 20.4 %   23.6 %   
Marital status      <.001
  Married/cohabitating 97.9 %   95.3 %   
  Single 2.1 %   4.7 %   
Maternal educational      <.001
  Elementary 1.8 %   7.3 %   
  High school 25.7 %   39.2 %   
  Higher degree 72.6 %   52.5 %   
  Mean S.D. Mean S.D.  
Age 31.6 4.5 30.3 5.1 <.001
Body mass index (BMI) (week 32) 24.5 4.5 24.7 5.0 .246