Table 1.

Pooled estimates of anxiety by categorical moderator variables (subgroup analyses).

Overall		Number of Studies	Proportion (%)	95% CI	I2	p-Value	References
Anxiety prevalence		20	34.4%	29.5,39.7	99.1%	<0.0001	[19,35,36,38,39,40,42,43,44,47,50,51,52,53,54,55,56,57,58,59]
Subgroup Analysis
Categories	Subgroups	Number of Studies	Proportion (%)	95% CI	I2	p-Value	References
Quality	Good	9	29.3	16.8,45.8	99.8%	<0.0001	[19,35,38,43,44,47,56,58,59]
	Medium	11	48.4	33.0,64.1	99.6%	<0.0001	[36,39,40,42,50,51,52,53,54,55,57]
Continents	Asia	13	30.4	20.0,43.4	99.8%	<0.0001	[19,35,36,38,42,44,50,53,54,56,57,58,59]
	Other	7	57.5	38.6,74.4	98.8%	<0.0001	[39,40,43,47,51,52,55].
Countries	China	11	25.5	16.7,36.9	99.8%	<0.0001	[19,35,36,38,42,44,53,56,57,58,59]
	Other	9	58.7	44.0,72.0	98.7%	<0.0001	[39,40,43,47,50,51,52,54,55]
Assessment	GAD	8	33.0	18.1,52.3	99.4%	<0.0001	[35,38,43,44,53,54,57,59]
	Other	12	43.9	28.9,60.1	99.8%	<0.0001	[19,36,39,40,42,47,50,51,52,55,56,58]
Gender	Female	5	34.6	20.5,52.0	99.0%	<0.0001	[54,56,57,58,59]
	Male	5	22.9	36.3,52.5	98.3%	<0.0001	[54,56,57,58,59]
Level of Anxiety	Mild	7	73.7	63.8,81.7	96.9	<0.0001	[44,53,54,55,56,57,59]
	Moderate	7	23.1	16.2,31.8	97.7	<0.0001	[44,53,54,55,56,57,59]
	Severe	7	7.0	4.8,11.3	92.3	<0.0001	[44,53,54,55,56,57,59]

GAD: Generalized Anxiety Disorder.