Table 2 Quality assessment of the included studies
Selection | Comparability | Exposure | Total point | ||||||
|---|---|---|---|---|---|---|---|---|---|
Author (year) | (1) Representativeness of the exposed cohort | (2) Selection of the nonexposed cohort | (3) Ascertainment of exposure | (4) Demonstration that outcome of interest was not present at start of study | (1) Comparability of cohorts on the basis of the design or analysis | (1) Assessment of outcome | (2) Was follow-up long enough for outcomes to occur | (3) Adequacy of follow-up of cohorts | |
Guidera (2013) [14] | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Kerawala (2021) [23] | 0 | 1 | 1 | 0 | 2 | 1 | 1 | 1 | 7 |
Stramiello (2021) [24] | 0 | 1 | 1 | 1 | 2 | 1 | 1 | NA | 7 |
Le (2022) [25] | 1 | 1 | 1 | 0 | 2 | 1 | 1 | 1 | 8 |
Wu (2022) [26] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |