Statistics Quantitative data were analyzed with SPSS for Windows, version 15. All analyses were conducted on the basis of intention-to-treat. Summary statistics were compiled for the EG and CG couples on EPDS, social support, stress, couple relationship and postpartum variables (women’s somatic symptoms, childbirth outcomes and participation satisfaction of couples). Group differences in baseline characteristics were examined using chi-square tests, the Mann–Whitney test or the Kolmogorov-Smirnov test. Categorical data of principal variables are presented as percentages and comparisons made by chi-square tests. Univariate analysis used average and standard deviation by 95% confidence interval. Analysis of secondary variables applied the Student t test and the chi-square test.