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

Table 1

Characteristics of eligible studies.

References	Country	Gender		Age		No.		NOS
		Experimental	Control	Experimental	Control	Experimental	Control
Zhang and Li (2016) [23]	China	M: 17; F: 62	M: 34; F: 66			79	100	7
Chen and Wang (2014) [19]	China	M: 11; F: 57	M: 4; F: 16			68	20	7
Song et al. (2018) [16]	China	M: 7; F: 52	M: 17; F: 29			59	46	7
Yang et al. (2015) [18]	China	M: 83; F: 69	M: 60; F: 40			152	100	7
Wu et al. (2019) [21]	China	M: 13; F: 12	NA			25	25	6
Wan et al. (2016) [20]	China	M: 10; F: 35	M: 6; F: 15			45	21	6
Xu et al. (2017) [22]	China	M: 12; F: 47	NA		NA	59	30	6
Xia et al. (2015) [17]	China	M: 22; F: 128	M: 6; F: 44			150	50	7
Ragab et al. (2019) [15]	Africa	M: 8; F: 40	M: 7; F: 35			48	42	6
Akram et al. (2018) [24]	Pakistan	M: 19; F: 27	M: 11; F: 9			46	20	6

M: male; F: female; No: number; NOS: Newcastle-Ottawa Scale; NA: not available.