Table 1.

Summary results for the effects sizes as a function of the outcome measure

Outcome	Model	k	Type of effect	Effect size	95% CI	Q	P-value	I2
Prevalence	Fixed	9	OR	3.013	2.461–3.689	15.327	0.053	47.806
	Random			3.426	2.505–4.686
Level of conflict	Fixed	9	d	0.597	0.499–0.695	9.959	0.268	19.672
	Random			0.606	0.489–0.722
Symptom severity	Fixed	9	r	0.352	0.287–0.413	5.041	0.753	<0.001
	Random			0.352	0.287–0.413
Global results	Fixed	27	d	0.658	0.532–0.783	4.542	0.805	<0.001
	Random			0.658	0.532–0.783

Abbreviations: OR, odds ratio; k, number of studies; CI, confidence interval; Q, heterogeneity statistic; I², heterogeneity index.