Study |
Random selection in the population |
Definition of inclusion and exclusion criteria |
Report of losses to follow-up |
Validated measurements |
Statistical analysis |
Risk of bias |
---|---|---|---|---|---|---|
den Hartog et al. [19] | Yes | Yes | Yes | Yes | Yes | Low |
Khraisat et al. [20] | No | Yes | Yes | Yes | Yes | Moderate |
Van Nimwegen et al. [21] | Yes | Yes | Yes | Yes | Yes | Low |