Percutaneous Coronary Intervention versus Coronary Artery Bypass Grafting for Chronic Total Occlusion of Coronary Arteries: A Systematic Review and Meta-Analysis

Table 1

Quality of studies as per Newcastle Ottawa scale.

Serial numbers	Study	Study design	Selection	Comparability	Outcome
1	Gai et al.	Retrospective	★★★	★	★★★
2	Kawashima et al.	Randomized	★★★	★	★★★
3	Lin et al.	Prospective	★★★★	★	★★★
4	Liu et al.	Prospective	★★★	★	★★★
5	Kim et al.	Retrospective	★★★★	★	★★
6	Woo et al.	Retrospective	★★★	★	★★★
7	Tomasello et al.	Prospective	★★★	★	★★
8	Woo et al.	Retrospective	★★★	★	★★★
9	Luis et al.	Prospective	★★★	★	★★