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

Table 1

Literature quality evaluation.

Author	Year	Groups		NOS score
		Single pregnancy group	Twin pregnancy group
Buhling et al., [4]	2003	178	89	6
Jung et al., [5]	2015	3435	143	6
Lai et al., [6]	2012	327198	5552	5
Rauh-Hain et al., [7]	2009	22503	553	7
Akiba et al., [8]	2019	451	20	8
Morikawa et al., [9]	2015	3667	110	6
Ashwal et al., [10]	2021	1893	180	7
González González et al., [11]	2014	39	39	6
Guillén-Sacoto et al., [12]	2018	240	120	7
Hiersch et al., [13]	2018	16,731	326	8
Weiner et al., [14]	2018	228	57	6