The effectiveness of community engagement in public health interventions for disadvantaged groups: a meta-analysis

Table 13 Results of the random effects ANOVA analyses comparing intervention duration categories for health consequences and self-efficacy outcomes

Outcome	Intervention duration	Pooled ES estimate	95% CI	n
Health consequences ^a	Less than 6 months	.36**	.16, .57	13
	6 Months to 23 months	.09	-.07, .26	16
	2 or more years	.06	-.16, .28	8
Participant self-efficacy ^b	Less than 6 months	.41*	.01, .81	7
	6 Months to 23 months	.41*	.00, .82	6
	2 or more years	.48*	.08, .88	6

*p < .05, **p < .01. Note. ES = effect size; 95% CI = 95% confidence interval; n = the number of effect size estimates in each category, of the predictor variable. ^aQ_B (2) = 5.20, p = .07. Q_W (34) = 35.19, p = .41. ^bQ_B (2) = .07, p = .96. Q_W (16) = 18.94, p = .27.

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