Table 2. Overall effect size of eye movement desensitization reprocessing (EMDR) for posttraumatic stress disorder (PTSD) patients.

		Effect Size	95% CI		Null hypothesis		Homogeneity
					(two-tailed test)
	Sample size (studies)	Hedges's g	Lower	Upper	Z value	P value	Q value	P value	I 2	τ2
PTSD symptoms	22	−0.662	−0.887	−0.436	−5.750	0.001	65.062	0.001	67.723	0.184
Depression	20	−0.643	−0.864	−0.422	−5.713	0.001	42.657	0.001	55.458	0.133
Anxiety	16	−0.640	−0.890	−0.390	−5.025	0.001	46.804	0.001	67.951	0.164
Subjective distress	12	−0.956	−1.388	−0.525	−4.341	0.001	47.622	0.001	76.901	0.431

P values>0.001 were rounded to two digits.

CI, confidence interval.