Table 3 Study quality assessment using the Newcastle-Ottawa Scale for nonrandomized studies
Selection | Outcome | ||||||||
|---|---|---|---|---|---|---|---|---|---|
First author, year of publication (reference) | Representativeness of exposed cohort | Selection of nonexposed cohort | Ascertainment of exposure | Outcome of interest absent at start of study | Comparability (Based on design and analysis) | Assessment of outcome | Follow-up long enough for outcomes to occur | Adequacy of follow-up | Total score |
Lorusso et al. | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Lio et al. | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Ljubacev et al. | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 6 |
Roshanali et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Maltais et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Qiu et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Micovic et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Bonacchi et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Silberman et al. | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Mantovani et al. | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |
Reece et al. | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |