Characteristics of incidents (n=1721) from video analysis of all games (n=240 each season)
| 2010 | 2011 | 2010 vs 2011 | |||
|---|---|---|---|---|---|
| Incidents | Rate | Incidents | Rate | Rate ratio | |
| Contact opponent | 734 | 92.7 (86.0 to 99.4) | 687 | 86.7 (80.3 to 93.2) | 0.94 (0.84 to 1.04) |
| Contact teammate | 28 | 3.5 (2.2 to 4.8) | 28 | 3.5 (2.2 to 4.8) | 1.00 (0.59 to 1.69) |
| Non-contact | 68 | 8.6 (6.5 to 10.6) | 91 | 11.5 (9.1 to 13.9) | 1.34 (0.98 to 1.83) |
| Contact ball | 32 | 4.0 (2.6 to 5.4) | 45 | 5.7 (4.0 to 7.3) | 1.41 (0.89 to 2.21) |
| Other | 6 | 0.8 (0.2 to 1.4) | 2 | 0.3 (−0.1 to 0.6) | 0.33 (0.07 to 1.65) |
Rate is reported as the number of incidents per 1000 player-match hours with 95% CI. Rate ratios between the 2010 and 2011 seasons are shown with 95% CI, with the 2010 season as the reference group.