[Retracted] The Correlation between Obstructive Sleep Apnea and Retinal Vein Obstruction: A Meta-Analysis and Systematic Review

Table 2

Assessment of study quality.

Inclusion study	Selection	Comparability	Exposure	Total
Wan et al. 2021 [23]	4	2	2	8
Li et al. 2020 [24]	3	2	2	7
Wang et al. 2019 [25]	3	2	2	7
Chen et al. 2019 [26]	4	2	2	8
Agard et al. 2018 [27]	3	1	2	6
Chou et al. 2012 [28]	3	1	2	6