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Table 2 Interventions during labour and delivery and infant outcome1).

From: Special features of health services and register based trials – experiences from a randomized trial of childbirth classes

    Crude Marital status adjusted1)
  Intervention Control OR (95% CI) OR1 (95% CI)
  (n = 845) (n = 723)   
Mode of delivery % %   
   C-section (any) 19 16 1.29 (0.99–1.67) 1.29 (0.99–1.68)
Planned 7 6 1.18 (0.78–1.79) 1.20 (0.79–1.82)
Other 13 10 1.31 (0.95–1.79) 1.30 (0.95–1.78)
   Instrumental 7 6 1.05 (0.70–1.56) 1.01 (0.68–1.52)
   Vaginal 74 78 0.81 (0.64–1.02) 0.81 (0.64–1.03)
  1. 1) Crude odds ratios (95% confidence intervals, CI) and odds ratios adjusted for marital status and birthweight. In adjustment for marital status classes used were: married, common law, other.