Table 2 Quality assessment of cohort studies using the NOS
Study | Selection | Comparability | Outcome | |||||
|---|---|---|---|---|---|---|---|---|
Representativeness of exposed cohort | Selection of non-exposed cohort | Ascertainment of exposure | Demonstration that outcome of interest was not present at start of study | Comparability of cohorts on the basis of the design or analysis | Assessment of outcome | Follow-up long enough | Adequacy of follow up of cohorts | |
Iwami 2021 | * | * | - | * | * | - | * | * |
Barra 2020 | * | * | - | * | * | - | * | * |
Muller 2017 | * | * | * | * | * | * | * | - |