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Table 4 Association between social support and postpartum depressive symptoms in strata defined by the potential confounder candidates

From: The effect of perceived social support during early pregnancy on depressive symptoms at 6 weeks postpartum: a prospective study

 n (%)OR (95% CI) *P for effect modification
Economic status  0.83
 Difficult/careful/loan355 (13.4)1.89 (1.00–3.57) 
 Fair1796 (67.9)1.44 (0.92–2.28) 
 Good493 (18.6)1.28 (0.36–4.57) 
Health level  0.59
 Fair/poor/very poor587 (22.9)1.33 (0.81–2.18) 
 Good1539 (60.0)1.82 (1.07–3.09) 
 Very good438 (17.1)1.95 (0.53–7.07) 
Sleep quality  0.51
 Fair/poor/very poor1292 (50.8)1.49 (0.99–2.26) 
 Good/very good1250 (49.2)1.74 (0.90–3.37) 
  1. Inf: infinity
  2. * Calculated by logistic regression for the association between social support and postpartum depressive symptoms