Quality scores of the articles selected
| Articles | Questions | Outcome | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Definition | Demographics | Prospective design | 80% follow up | Withdrawals | Blinding | Data presentation | Multivariate analysis | ||
| Questions that could be answered with yes are “+”; those answered with no or unknown are “−”; “+” scores 1 and “–” scores 0. | |||||||||
| na, not applicable. | |||||||||
| Taunton et al, 200319 | + | + | + | + | – | – | + | + | 6 |
| Lun et al, 200412 | + | + | + | – | + | + | + | – | 6 |
| Satterthwaite et al, 199917 | + | + | + | + | – | – | + | + | 6 |
| Wen et al, 199821 | + | + | + | – | + | + | + | + | 7 |
| Bennell et al, 19969 | + | + | + | + | – | + | + | – | 6 |
| Macera et al, 199123 | + | + | – | + | – | – | + | + | 5 |
| Macera et al, 198914 | + | + | + | – | + | – | + | + | 6 |
| Walter et al, 198920 | + | + | + | – | + | + | + | – | 6 |
| Jakobsen et al, 198922 | + | + | – | – | – | – | + | – | 3 |
| Kretsch et al, 198411 | + | – | + | – | – | – | + | – | 3 |
| Nicholl & Williams, 198215 | + | + | + | + | – | + | + | – | 6 |
| Nicholl & Williams, 198225 | + | + | – | + | – | + | + | – | 5 |
| Steinacker et al, 200118 | – | + | + | – | – | na | na | na | 2 |
| Satterthwaite et al, 199616 | + | + | + | + | – | na | na | na | 4 |
| Bovens et al, 198910 | + | + | + | – | + | na | na | na | 4 |
| Lysholm & Wiklander, 198713 | + | + | + | + | – | na | na | na | 4 |
| Maughan & Miller, 198324 | + | + | – | – | – | na | na | na | 2 |