Table S3. NOS scoring records of the included studies.
| Authors [year] | Selection | Comparability | Exposure | Total score | ||
|---|---|---|---|---|---|---|
| Assessment of outcome | Follow-up long enough for outcomes | Adequacy of follow-up of cohorts | ||||
| Algar et al. [2001] (21) | 4 | 2 | 1 | 0 | 1 | 8 |
| Hu et al. [2013] (22) | 4 | 1 | 1 | 1 | 1 | 8 |
| Lindner et al. [2010] (23) | 4 | 1 | 1 | 1 | 1 | 8 |
| Panagopoulos et al. [2009] (24) | 4 | 1 | 1 | 1 | 1 | 8 |
| Sekine et al. [2002] (2) | 4 | 1 | 1 | 0 | 1 | 7 |
| Sekine et al. [2013] (6) | 4 | 1 | 1 | 0 | 1 | 7 |
| Stolz et al. [2014] (25) | 4 | 2 | 1 | 1 | 1 | 9 |
| Yena et al. [2006] (26) | 4 | 2 | 1 | 1 | 1 | 9 |
NOS, Newcastle-Ottawa Scale.