Table 1

Univariate results of the association between the variables and taking greater than 3 weeks to return to competition

VariablenPercentage of players within each stratum of predictor variableRR (95% CI)p Value
Time taken to walk pain-free
≤1 day (reference)3030.00.027
>1 day2958.62.0 (1.0 to 3.7)
Time taken to ascend stairs pain-free
≤1 day (reference)2429.20.056
>1 day3554.31.9 (0.9 to 3.7)
Past history (within 12 months) of a hamstring injury
No (reference)4738.30.077
Yes1266.71.7 (1.0 to 3.0)
Hamstring region injured
Medial (reference)1729.40.149
Lateral4250.01.7 (0.8 to 3.8)
Slump test
 Negative (reference)3850.00.217
 Positive2133.30.7 (0.4 to 1.3)
Active knee extension test
 Negative (reference)4740.40.265
 Positive1258.31.4 (0.8 to 2.6)
Taking non-steroidal anti-infl ammatories in the fi rst 3 days
 No (reference)4148.180.271
 Yes1833.30.7 (0.3 to 1.4)
Mechanism of injury
 Running (reference)4047.50.441
 Non-running1936.80.8 (0.4 to 1.5)
Pain provocation test
 Negative (reference)1643.70.976
 Positive4344.21.0 (0.5 to 1.9)
Passive straight leg raise test
 Negative (reference)4944.90.999
 Positive1040.00.9 (0.4 to 2.0)