Table 3 Scoring according to Newcastle-Ottawa Quality Assessment Form for Case-control Studies [20]
Study | Terms | Görmez et al. (2015) [16] | Yoshimaki T. et al. (2013) [14] |
|---|---|---|---|
Selection | Is the case definition adequate? | 1 | 1 |
Representativeness of the cases | 1 | 1 | |
Selection of Controls | 1 | 1 | |
Definition of Controls | 1 | 1 | |
Comparability | Comparability of cases and controls on the basis of the design or analysis | 2 | 2 |
Both test and control surgical sites underwent the same procedure at the begging of the study. The race, age and the breeding place in every group were the same. Confidence in comparability of results is contributed by the fact that both test and control sites were in the same individuals. | Both test and control groups underwent the same procedure at the begging of the study. The race, age and the breeding place in both groups were the same. Authors maintain, that all the subjects got the same number of injections at a similar frequency. | ||
Outcome | Ascertainment of exposure | 1 | 0 – not described |
Same method of ascertainment for cases and controls | 1 | 0 – not described | |
Non-Response rate | No description | No description | |
Total | 8 | 6 | |