Univariate results of the association between the variables and taking greater than 3 weeks to return to competition
| Variable | n | Percentage of players within each stratum of predictor variable | RR (95% CI) | p Value |
|---|---|---|---|---|
| Time taken to walk pain-free | ||||
| ≤1 day (reference) | 30 | 30.0 | – | 0.027 |
| >1 day | 29 | 58.6 | 2.0 (1.0 to 3.7) | |
| Time taken to ascend stairs pain-free | ||||
| ≤1 day (reference) | 24 | 29.2 | – | 0.056 |
| >1 day | 35 | 54.3 | 1.9 (0.9 to 3.7) | |
| Past history (within 12 months) of a hamstring injury | ||||
| No (reference) | 47 | 38.3 | – | 0.077 |
| Yes | 12 | 66.7 | 1.7 (1.0 to 3.0) | |
| Hamstring region injured | ||||
| Medial (reference) | 17 | 29.4 | – | 0.149 |
| Lateral | 42 | 50.0 | 1.7 (0.8 to 3.8) | |
| Slump test | ||||
| Negative (reference) | 38 | 50.0 | – | 0.217 |
| Positive | 21 | 33.3 | 0.7 (0.4 to 1.3) | |
| Active knee extension test | ||||
| Negative (reference) | 47 | 40.4 | – | 0.265 |
| Positive | 12 | 58.3 | 1.4 (0.8 to 2.6) | |
| Taking non-steroidal anti-infl ammatories in the fi rst 3 days | ||||
| No (reference) | 41 | 48.18 | – | 0.271 |
| Yes | 18 | 33.3 | 0.7 (0.3 to 1.4) | |
| Mechanism of injury | ||||
| Running (reference) | 40 | 47.5 | – | 0.441 |
| Non-running | 19 | 36.8 | 0.8 (0.4 to 1.5) | |
| Pain provocation test | ||||
| Negative (reference) | 16 | 43.7 | – | 0.976 |
| Positive | 43 | 44.2 | 1.0 (0.5 to 1.9) | |
| Passive straight leg raise test | ||||
| Negative (reference) | 49 | 44.9 | – | 0.999 |
| Positive | 10 | 40.0 | 0.9 (0.4 to 2.0) | |