Table 3 Methodological quality assessment of case–control studies using the Newcastle-Ottawa Scale
From: Association between osteoporosis and benign paroxysmal positional vertigo: a systematic review
Study | Vibert 2003[15] | Jeong 2009[12] | Mikulec 2010[13] | Yamanaka 2013[16] | Stefano 2013[17] |
|---|---|---|---|---|---|
SELECTION | |||||
Is the case definition adequate? | ☆ | ☆ | ☆ | ☆ | ☆ |
Representativeness of the cases | ☆ | ☆ | ☆ | ||
Selection of controls | |||||
Definition of controls | ☆ | ☆ | ☆ | ☆ | ☆ |
COMPARABILITY | |||||
Comparability of cases and controls on the basis of the design or analysis | ☆☆ | ☆☆ | ☆ | ☆☆ | ☆☆ |
EXPOSURE | |||||
Ascertainment of exposure | ☆ | ☆ | ☆ | ☆ | |
Same method of ascertainment for cases and controls | ☆ | ☆ | ☆ | ☆ | ☆ |
Non-response rate | |||||
Total number of star | 6 | 7 | 5 | 6 | 7 |