Table 2 Quality of the included studies
No. | References | Selection | Compatibility | Exposure | Total score (7) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
Is the case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Ascertainment of exposure | Same method of ascertainment for cases and controls | Non-response Rate | ||||
1. | Asua et al. [2] | * | Â | Â | NA | * | * | * | * | 5 |
2 | Barber et al. [3] | * | Â | Â | NA | * | * | * | * | 5 |
3. | Calderaro et al. [4] | * | * | Â | NA | * | * | * | * | 6 |
4. | Camargo-Ayala et al. [5] | * | * | Â | NA | * | * | * | * | 6 |
5. | Dhangadamajhi et al. [6] | * | * | Â | NA | * | * | * | * | 6 |
6. | Dormond et al. [40] | * | Â | Â | NA | * | * | * | * | 5 |
7. | Fuehrer et al. [41] | * | * | Â | NA | * | * | * | * | 6 |
8. | Gabrielli et al. [42] | * | * | * | NA | * | * | * | * | 7 |
9. | Hopkins et al. [22] | * | â–¡ | â–¡ | NA | * | * | * | * | 7 |
10. | Jiang et al. [43] | * | Â | Â | NA | * | * | * | * | 5 |
11. | Kasehagen et al. [11] | * | * | * | NA | * | * | * | * | 7 |
12. | Krishna et al. [18] | * | Â | Â | NA | * | * | * | * | 5 |
13. | Lorenzetti et al. [44] | * | Â | Â | NA | * | * | * | * | 5 |
14. | Marques et al. [45] | * | * | * | NA | * | * | * | * | 7 |
15. | May et al. [7] | * | * | * | NA | * | * | * | * | 7 |
16. | Mehlotra et al. [13] | * | * | * | NA | * | * | * | * | 7 |
17. | Mehlotra et al. [12] | * | Â | Â | NA | * | * | * | * | 5 |
18. | Mueller et al. [14] | * | * | * | NA | * | * | * | * | 7 |
19. | Nino et al. [46] | * | * | Â | NA | * | * | * | * | 6 |
20. | Pati et al. [19] | * | * | Â | NA | * | * | * | * | 6 |
21. | Perandin et al. [20] | * | * | Â | NA | * | * | * | * | 6 |
22. | Peruzzi et al. [21] | * | * | Â | NA | * | * | * | * | 6 |
23. | Pongvongsa et al. [28] | * | * | * | NA | * | * | * | * | 7 |
24. | Putaporntip et al. [25] | * | * | Â | NA | * | * | * | * | 6 |
25. | Rubio et al. [38] | * | * | Â | NA | * | * | * | * | 6 |
26. | Rubio et al. [38] | * | * | Â | NA | * | * | * | * | 6 |
27. | Sitali et al. [29] | * | * | * | NA | * | * | * | * | 7 |
28. | Sluydts et al. [15] | * | * | * | NA | * | * | * | * | 7 |
29. | Steenkeste et al. [16] | * | * | * | NA | * | * | * | * | 7 |
30. | Steenkeste et al. [17] | * | * | * | NA | * | * | * | * | 7 |
31. | Subissi et al. [23] | â–¡ | * | * | NA | * | * | * | * | 7 |
32. | Toma et al. [27] | â–¡ | * | * | NA | * | * | * | * | 7 |
33. | Woldearegai et al. [47] | * | * | * | NA | * | * | * | * | 7 |
34. | Zhou et al. [24] | * | * | * | NA | * | * | * | * | 7 |
35. | Zhou et al. [26] | * | * | Â | NA | * | * | * | * | 6 |