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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