Table 2 Newcastle–Ottawa quality assessment form for cohort studies
Selection | Comparability | Outcome | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
First author, Year of publication | Representativeness of exposed cohort | Selection of non-exposed cohort | Ascertainment of exposure | Outcome of interest not present at study start | Comparability of cohorts in main factors | Comparability of cohorts in additional factors | Assessment of outcome | Sufficient length of follow-up for outcomes to occur | Adequacy of follow-up of cohorts | Total | Quality Assessment | Comments |
Narayan et al.,1994 [20] | ★ | - | ★ | - | ★ | ★ | ★ | - | ★ | 6/9 | Fair | |
Ijland et al.,1997 [8] | - | - | ★ | ★ | - | - | ★ | - | ★ | 4/9 | Poor | No statement of comparison group |
Fanchin et al.,1998 [22] | ★ | - | ★ | - | ★ | - | ★ | ★ | ★ | 6/9 | Fair | |
Ijland et al.,1998 [21] | ★ | - | ★ | ★ | - | - | ★ | ★ | ★ | 6/9 | Poor | No comparison group |
Ijland et al.,1999 [23] | ★ | - | ★ | ★ | - | ★ | ★ | - | - | 5/9 | Fair | No statment in follow up |
Fanchin et al.,2000 [24] | ★ | - | ★ | ★ | - | - | ★ | - | - | 4/9 | Poor | No comparison group; No statment in follow up |
Vlaisavljevic et al.,2001 [25] | ★ | - | ★ | - | ★ | ★ | ★ | - | ★ | 6/9 | Fair | |
Ayoubi et al.,2003 [6] | ★ | - | ★ | - | ★ | ★ | ★ | ★ | ★ | 7/9 | Fair | |
Vangestel et al.,2005 [26] | ★ | - | ★ | ★ | ★ | ★ | ★ | - | ★ | 7/9 | Good | |
Kim et al., 2013 [27] | ★ | - | ★ | ★ | - | ★ | ★ | ★ | ★ | 7/9 | Fair | |
Zhu et al., 2014 (March) [32] | ★ | - | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 8/9 | Good | |
Zhu et al.,2014 (Nov 2013) [9] | ★ | - | ★ | ★ | - | - | ★ | - | - | 4/9 | Fair | No statment in follow up |
Chung et al.,2017 [28] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 9/9 | Good | |
Samara et al., 2019 [29] | ★ | ★ | ★ | - | ★ | - | ★ | - | ★ | 6/9 | Good | |
Blank et al.,2020 [14] | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 9/9 | Good | |
Anshikha et al., 2021 [30] | ★ | - | ★ | ★ | - | - | ★ | ★ | ★ | 6/9 | Poor | No comparison group |
Li et al.,2023 | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 9/9 | Fair | |
Masroor et al.,2023 [31] | ★ | - | ★ | ★ | ★ | - | ★ | ★ | ★ | 7/9 | Good | |