[Retracted] Study on Risk Factors Related to Intrauterine Adhesion Based on Meta-Analysis

Table 1

Basic characteristics of included literature.

Author	Years			Risk factors	NOS scores
		Experience group	Control group
Ajayi et al. [11]	2017	265	641	(7)	6
Dawood et al. [12]	2010	30	24	(7) (8)	8
Liu et al. [13]	2014	50	10	(9) (10)	9
Can et al. [14]	2018	31	29	(2) (6)	7
Zhu et al. [15]	2019	180	56	(2) (5) (9)	5
Li et al. [16]	2019	48	52	(1) (2) (7)	6
Mentula et al. [17]	2018	12	80	(7)	8
Ludwin et al. [18]	2014	47	49	(4)	8
Chen et al. [19]	2015	29	53	(2) (6) (7) (8) (10)	7
Zhu et al. [20]	2018	74	76	(2) (5) (7) (9)	5
Du and Wang [21]	2020	66	339	(1) (2) (3) (4) (5)	9
He [22]	2020	50	50	(2) (3) (4) (6)	8

Note: (1) pelvic inflammation; (2) pregnancy times; (3) negative pressure during uterine suction; (4) suction time; (5) number of curettages; (6) average number of births; (7) abortion; (8) myomectomy of uterus; (9) abnormal menstruation; (10) infertility.