Table 3.

Results of stratified anxiety meta-analyses.

Stratified analyses			Quality of the included studies	Total studies, n	Standardized mean difference (95% CI)	Cochran Q (df)	Cochran Q, P value	I2 (%)
Randomization type
		Clustered [42,49,53]	1 good; 2 poor	3	−0.22 (−0.32 to −0.12)	1.52 (2)	.47	0.0
		Other [39-41,44,45,48,52,54]	2 good; 2 fair; 4 poor	8	−0.22 (−0.42 to −0.02)	14.16 (7)	.048	50.6
Analysis type
		Intention to treat [39,44,45,52]	1 good; 2 fair; 1 poor	4	−0.14 (−0.34 to 0.05)	4.10 (3)	.25	26.9
		Other or unclear [40-42,48,49,53,54]	2 good; 5 poor	7	−0.25 (−0.41 to −0.09)	10.84 (6)	.09	44.7
Intervention type
		Treatment [39-42,45,48,49,52,54]	2 good; 2 fair; 5 poor	9	−0.18 (−0.33 to −0.03)	14.60 (8)	.07	45.2
		Prevention [44,53]	1 good; 1 poor	2	−0.30 (−0.48 to −0.11)	0.30 (1)	.59	0.0
Control group type
	Treatment [39,45,49]		3 good; 1 fair; 5 poor	3	−0.07 (−0.26 to 0.12)	0.78 (2)	.68	0.0
	Other [39-42,44,48,49,52-54]		1 good; 2 fair	10	−0.23 (−0.36 to 0.10)	14.31 (9)	.11	37.1
Study quality
		Good [40,44,49]	3 good	3	−0.25 (−0.47 to −0.03)	2.98 (2)	.23	32.8
		Fair [39,45]	2 fair	2	−0.08 (−0.31 to 0.15)	0.05 (1)	.83	0.0
		Poor [41,42,48,52-54]	6 poor	6	−0.22 (−0.43 to −0.02)	10.97 (5)	.05	54.4