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Table 3 Results of the subgroup analyses

From: The effectiveness of one-to-one peer support in mental health services: a systematic review and meta-analysis

Outcome Subgroups k N1/N2 SMD 95% CI z (p-value) Qint (p-value)
Overall psychiatric symptoms Substitute PS 1 48/48 0.35 -0.05, 0.75 0.1 (0.937) 3.44 (0.064)
Adjunctive PS 5 392/369 −0.07 −0.27, 0.12 0.7 (0.466)
Lower level of organisational support 2 91/92 −0.24 − 0.53, 0.05 0.6 (0.521) 2.64 (0.104)
Higher level of organisational support 4 349/325 0.09 −0.18, 0.35 0.6 (0.581)
Social network support Substitute PS 1 48/48 −0.30 −0.70, 0.10 1.5 (0.144) 4.27 (0.039)
Adjunctive PS 3 210/206 0.23 −0.07, 0.53 1.5 (0.134)
Lower level of organisational support 1 60/60 0.50 0.14, 0.87 2.7 (0.007) 4.9 (0.028)
Higher level of organisational support 3 198/194 −0.04 −0.37, 0.28 0.7 (0.784)
  1. Key: k – number of trials; N1 – sample size in intervention arm; N2 – sample size in control arm; SMD Standardised mean difference, CI Confidence interval; z(p-value) – test of overall subgroup effect; Qint (p-value) – test of subgroup differences