Perinatal Outcomes and Related Risk Factors of Single vs Twin Pregnancy Complicated by Gestational Diabetes Mellitus: Meta-Analysis

Table 2

The related risk factors.

Exposure factors	Number of literatures	Heterogeneity test			OR (95% CI)
		(%)		Effect model
Age	10	93	<0.00001	REM	0.46 [−0.42, 1.33]	0.31
Infertility	8	95	<0.00001	REM	1.94 [1.03, 3.67]	0.04
Gestational weight gain	4	96	<0.00001	REM	3.80 [1.08, 6.52]	0.006
Family history of diabetes	5	52	0.08	FEM	1.31 [1.19, 1.44]	<0.00001
Pre-BMI	9	20	0.26	FEM	−0.09 [−0.30, 0.11]	0.37