Effectiveness of relaxation techniques ‘as an active ingredient of psychological interventions’ to reduce distress, anxiety and depression in adolescents: a systematic review and meta-analysis

Table 5 Meta-regression analysis showing association between anxiety, distress and depression outcome and density of dosage of interventions

Covariate	Coefficient	Standard error	Z-value	P
Anxiety
Intercept	− 0.29	0.14	− 2.10	0.04
Number of sessions	0	0.010	− 0.40	0.69
Duration of sessions	0	0	− 1.54	0.12
Duration of programme	0.03	0.03	0.86	0.40
Distress
Intercept	− 0.48	0.24	− 1.98	0.05
Number of sessions	0.02	0.01	1.61	0.11
Duration of sessions	0	0	− 1.46	0.14
Duration of programme	− 0.01	0.01	− 0.70	0.49
Depression
Intercept	− 0.015	0.22	− 0.71	0.48
Number of sessions	− 0.01	0.01	− 0.93	0.35
Duration of sessions	0	0.0	− 0.66	0.51
Duration of programme	0	0.01	0.27	0.79

_{Anxiety R2 analog = 44%, Distress R2 analog = 0.47, Depression R2 analog = 0.05}

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