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Table 2 Results of the main analysis

From: A systematic review and meta-analysis of group peer support interventions for people experiencing mental health conditions

Outcome Number of trials N SMD (95% CI), p-value Heterogeneity, I2; Chi,2 df Duration of follow-up, post end of treatment
Post-intervention
 Recovery [52, 55, 56, 58, 62] 5 1265 0.18 (0.07 to 0.29), p = 0.002 I2 = 0%; Chi2 = 4.01, df = 4  
 Hope [53, 56, 58] 3 1029 MD = 0.18 (− 0.34 to 0.69), p = 0.50 I2 = 0%; Chi2 = 1.68, df = 2  
 Empowerment [57, 58, 61, 62] 4 750 0.17 (− 0.07 to 0.40), p = 0.17 I2 = 55%; Chi2 = 6.67, df = 3  
 Global symptoms [52, 54, 58] 3 823 −0.13 (− 0.27 to 0.01), p = 0.07 I2 = 0%; Chi2 = 1.11, df = 2  
 Depression [52, 55, 58, 62] 4 929 −0.09 (− 0.22 to 0.04), p = 0.18 I2 = 0%; Chi2 = 0.99, df = 3  
Follow-up
 Recovery [52, 55, 56, 62] 4 983 0.21 (0.08 to 0.34), p = 0.002 I2 = 5%; Chi2 = 3.16, df = 3 3 to 6 months
 Empowerment [57, 61, 62] 3 487 0.13 (−0.05 to 0.31), p = 0.14 I2 = 0%; Chi2 = 0.37, df = 2 3 weeks to 6 months
 Depression [52, 55, 62] 3 674 −0.12 (− 0.27 to 0.03), p = 0.11 I2 = 0%; Chi2 = 0.95, df = 2 3 to 6 months
  1. Means and Standard Deviations for TAU and clinician-led comparator group were combined for Eisen 2012. MD Mean Difference, SMD Standardised Mean difference, CI confidence interval, SMDs are reported unless stated otherwise, N number of participants providing outcome data, df degrees of freedom