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Table 2 Changes in knowledge status between comparison and intervention group at pre- and post-assessments

From: A theory-based educational intervention to pediatricians in order to improve identification and referral of maternal depression: a quasi-experimental study

  Pre Post Change   
  Mean (SD) Mean (SD) Mean (SD) P** P
I am familiar with the DSM-IV criteria for depression      
 Comparison group 1.9 (0.9) 1.9 (0.4) 0.0 (0.9) 0.957 <0.001
 Intervention group 2.1 (1.2) 3.5 (0.7) 1.4 (1.4) 0.003  
P* 0.783 <0.001    
Depression symptoms scale      
 Comparison group 65.0 (14.1) 89.7 (6.1) 24.7 (13.8) <0.001 0.591
 Intervention group 71.6 (16.1) 96.0 (6.8) 24.4 (18.1) <0.001  
P* 0.162 0.002    
  1. *p value for differences between the two groups; **p value for changes among pre- and post-measures; repeated measurements ANOVA, p value for interaction effect of time with group.