Table 2 Quality assessment of included studies according to the Newcastle–Ottawa scale
Study | Selection | Comparability | Exposure | Total score | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Representativeness of the exposed cohort | Selection of the non-exposed cohort | Ascertainment of exposures | Demonstration that outcome of interest was not present at start of study | Comparability of cohorts on the basis of the design or analysis | Study controls for any additional factor | Assessment of outcome | Was follow-up long enough for outcomes to occur | Adequacy of follow-up of cohorts | ||
Cho BW et al., 2020 [13] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 8 |
Jin C et al., 2016 [15] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Meier M et al., 2018 [17] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Stulberg SD et al., 2015 [18] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Ma Y et al., 2017 [19] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Martin S et al., 2014 [20] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Wernecke GC et al., 2012 [21] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Clary C et al., 2014 [22] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
Miyatake N et al., 2016 [23] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 8 |
Maciag BM et al., 2021 [24] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 8 |
Bizzozero P et al., 2018 [25] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |