Table 1 Result of the Newcastle-Ottawa scale quality assessment
Newcastle-Ottawa scale | Selection (1) | Â | Â | Â | Comparability (2) | Outcome(3) | Â | Â | Total |
|---|---|---|---|---|---|---|---|---|---|
| Â | Representativeness of the exposed cohort | Selection of the non-exposed cohort | Ascertainment of exposure | Demonstration that outcome of interest was not present at start of study | Comparability of cohorts on the basis of the design or analysis | Assessment of outcome | Was follow-up long enough for outcome to occur | Adequacy of follow up of cohorts | Â |
Shachar | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 6 |
Villasenor | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Rier | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
Caan | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Deluche | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
Song | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |