You are viewing the site in preview mode

Skip to main content

Advertisement

Table 3 Relative risks (RRs) with 95% confidence intervals (95% CI) of adequate maternal periconceptional folic acid supplement use (before and during pregnancy) by combining maternal and paternal education in 683,785 pregnancies, Norway, 1999–2010

From: Paternal characteristics associated with maternal periconceptional use of folic acid supplementation

   Adequate folic acid use Unadjusted Adjusted a
Maternal education Paternal education Yes No RR* 95% CI RR* 95% CI
Compulsory education Compulsory education 2557 48,326 0.46 0.43–0.50 0.53 0.50–0.57
  Intermediate education 4758 52,693 0.77 0.72–0.81 0.76 0.72–0.81
  Tertiary education 1292 10,651 1.00 Reference 1.00 Reference
  Missing information 208 4994     
Intermediate education Compulsory education 5079 43,708 0.60 0.57–0.62 0.66 0.64–0.68
  Intermediate education 18,055 116,378 0.77 0.75–0.79 0.81 0.79–0.83
  Tertiary education 7477 35,269 1.00 Reference 1.00 Reference
  Missing information 426 3928     
Tertiary education Compulsory education 3805 17,985 0.70 0.67–0.72 0.75 0.73–0.77
  Intermediate education 22,150 80,373 0.86 0.85–0.87 0.88 0.87–0.89
  Tertiary education 42,541 126,896 1.00 Reference 1.00 Reference
  Missing information 747 3539     
Missing data (maternal education) 28,179 1771     
  1. aAdjusted for paternal age (< 20, 20–24, 25–29, 30–34, 35–39, 40+), year of childbirth (1999–2010 (continuous)), paternal country of origin (Norway, high income countries, low/middle income countries), stratified by maternal education
  2. *p values for interaction between maternal and paternal education were calculated by likelihood-ratio tests (unadjusted p value < 0.001; adjusted p value < 0.001)