Table 1 Mean Edinburgh postnatal depression scores and changes in scores at different time points during and after pregnancy

From: Folic acid supplementation during pregnancy may protect against depression 21 months after pregnancy, an effect modified by MTHFR C677T genotype

Women classified as depressed according to an EPDS score >12 % N Total
18 weeks pregnancy 12.7 865 6809
32 weeks pregnancy 14.0 908 6482
8 weeks postpartum 9.23 574 6218
8 months postpartum 8.01 481 6005
21 months postpartum 9.36 520 5557
Edinburgh postnatal depression score Mean s.d. N
18 weeks pregnancy 6.84 4.78 6809
32 weeks pregnancy 6.83 4.95 6482
8 weeks postpartum 5.88 4.72 6218
8 months postpartum 5.23 4.58 6005
21 months postpartum 5.59 4.71 5557
Change in score between time points
18–32 weeks pregnancy 0.06 4.15 6482
32 weeks pregnancy to 8 weeks postpartum −0.89 4.49 6074
8 weeks postpartum to 8 months postpartum −0.64 4.04 5842
8 months postpartum to 21 months postpartum 0.41 4.03 5360
  1. Abbreviation: EPDS, Edinburgh postnatal depression scores.