Response rate ratios derived through Poisson regression for number of injuries reported per club per round
| Number of injuries per club per round (n) | Number of rounds in which injuries reported (n) | Response rate ratios (95% CI) |
|---|---|---|
| 0 | 11 | 1 |
| 1 | 15 | 0.98 (0.83 to 1.15) |
| 2 | 11 | 1.02 (0.87 to 1.20) |
| 3 | 16 | 1.03 (0.89 to 1.20) |
| 4 | 7 | 1.05 (0.89 to 1.25) |
| 5 | 2 | 1.06 (0.85 to 1.34) |
| 6 | 4 | 1.04 (0.86 to 1.27) |
| 8 | 1 | 1.08 (0.77 to 1.50) |
| 9 | 1 | 1.08 (0.79 to 1.46) |
| Total | 68* | – |
NB, reference category for Poisson regression designated as n=0 injuries; there were no rounds in which the number of injuries reported was equal to 7.
*For rounds 1, 2, 17 and 18 data was collected for 3 out of 4 clubs only.