Table 2 The results of Modified Downs and Black checklist* for quality assessment
| Â | Gottsaunerr et al. [23] | Mohamed et al. [24] | Mukhtar et al. [25] | Lamas et al. [26] | Yoon et al. [27] | Seneviratne et al. [28] | Carroul et al. [29] | Eduardo et al. [30] | Chaudhary et al. [31] |
|---|---|---|---|---|---|---|---|---|---|
Objective Clearly Stated 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Main outcomes clearly described 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Patients characteristics clearly defined 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Main findings clearly defined 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
Random variability in estimates provided 5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Sample targeted representative of population 6 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
Sample recruited representative of population 7 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
Primary outcomes valid/reliable 8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Total | 6 | 6 | 8 | 6 | 6 | 6 | 8 | 8 | 7 |