[Retracted] Serum IL-37 Level Is Associated with Rheumatoid Arthritis and Disease Activity: A Meta-Analysis

Table 2

Results of subgroup analysis of included literatures.

Subgroup		SMD (95% CI)			Heterogeneity		Model
					(%)
Ethnicity
Asians	9	1.42 (1.27, 1.58)	18.11	<0.00001	98%	<0.00001	R
African	1	1.75 (1.26, 2.24)	7.01	<0.00001	NA	NA	R
Sample size
Large	4	1.67 (0.40, 2.95)	2.57	0.01	98%	<0.00001	R
Small	6	1.17 (0.96, 1.37)	11.28	<0.00001	96%	<0.00001	R
Period
Active	3	3.67 (3.23, 4.11)	16.38	<0.00001	98%	<0.00001	R
Inactive	3	1.86 (1.45, 2.27)	8.93	<0.00001	97%	<0.00001	R
All	10	3.25 (2.21, 4.29)	6.13	<0.00001	98%	<0.00001	R

: number; CI: confidence interval; R: random-effect model; SMD: standard mean difference; NA: not available.