Table 5 Number and percentage of studies classified by each type of relationship investigation
| Â | Â | Sports injury type | |
|---|---|---|---|
| Â | Â | Single | Multiple |
Risk factors | Single (univariate analysis) | 7 studies (16%) | 29 studies (66%) |
Multiple (multivariate analysis) | 8 studies (18%) | 18 studies (41%) | |