Study | Selection | Outcome |
---|
Exposed cohort | Non-exposed cohort | Ascertainment of exposure | Outcome of interest | Comparability | Assessment of outcome | Length of follow-up | Adequacy of follow-up | Total score |
---|
Cha et al. [12] | * | * | * | * | * | * | * | * | 8 |
Nakamizo et al. [15] | * | * | * | * | * | * | * | * | 8 |
Jia et al. [16] | * | * | * | * | * | * | * | * | 8 |
- *Risk of bias was assessed using the Newcastle–Ottawa Scale. A higher overall score indicates a lower risk of bias; a score of 5 or less (out of 9) corresponds to a high risk of bias