Effect of Statins on Major Adverse Cardiovascular Events in Patients with Coronary Artery Spasm: A Meta-Analysis of the Asia Region

Table 3

Analysis of study methodology and bias of 10 studies included in the meta-analysis of patients with CAS with or without statins using the Newcastle-Ottawa scale.

Study	Representativeness of the exposed cohort	Selection of nonexposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at the start	Comparability of cohorts on the basis of the design or analysis	Assessment of outcome	Suitable length of follow-up	Adequacy of follow-up	Score
Kensuke Io et al.	0	1	1	1	0	1	1	1	6
Sunao Kodama et al.	0	1	1	1	0	1	1	0	5
Munenori Kosugi et al.	0	1	1	1	0	1	1	1	6
Akihiro Nakagomi et al.	0	1	1	1	0	1	1	1	6
Masanobu Ishii et al.	1	1	1	1	1	1	1	1	8
Min Seok Oh et al.	1	1	1	1	1	1	1	1	8
Zhe Hao Piao et al.	1	1	1	1	0	1	0	1	6
So Jin Park et al.	1	1	1	1	0	1	1	1	7
Won-Woo Seo et al.	1	1	1	1	1	1	0	1	7
Hiroyoshi Mori et al.	1	1	1	1	1	1	1	1	8

Each section can score a maximum of 1 except comparability, which can score a maximum of 2. Total score is out of 9.