Study | ECR | Risk of bias | Inconsistency | Indirectness (PICO) | Imprecision | Publication bias | Dose–response gradient | Confusion | Quality |
---|---|---|---|---|---|---|---|---|---|
Harr et al. [20] | Yes | SR | SR | SR | SR | Detectable | No | No | Very low |
Holmich et al. [14] | Yes | SR | SR | No SR | No SR | Undetectable | No | No | Moderate |
Weir et al. [16] | Yes | No SR | No SR | No SR | SR | Undetectable | No | No | High |
Yousefzadeh et al. [17] | Yes | No SR | No SR | No SR | SR | Detectable | No | No | Moderate |
Schoberl et al. [15] | Yes | No SR | No SR | No SR | No SR | Undetectable | No | No | High |
Yousefzadeh et al. [19] | Yes | SR | No SR | No SR | No SR | Undetectable | No | No | Moderate |
Gore et al. [18] | Yes | No SR | SR | No SR | No SR | Undetectable | No | No | High |
Paajanen et al. [13] | Yes | No SR | No SR | No SR | No SR | Undetectable | Yes | No | High |
Sheen et al. [12] | Yes | No SR | No SR | No SR | No SR | Undetectable | Yes | No | High |
Mazbouh et al. [21] | Yes | SR | No SR | SR | SR | Undetectable | No | No | Very low |