Table 3

Characteristics of head incidents due to opponent-to-player contact (n=410) from video analysis of all games (n=240 each season)

201020112010 vs 2011
IncidentsRateIncidentsRateRate ratio
All head incidents (n=410)
 Head-to-head749.3 (7.2 to 11.5)708.8 (6.8 to 10.9)0.95 (0.68 to 1.31)
 Arm-to-head10913.8 (11.2 to 16.3)7910.0 (7.8 to 12.2)0.72 (0.54 to 0.97)
 Shoulder-to-head101.3 (0.5 to 2.0)111.43 (0.65 to 2.2)1.10 (0.47 to 2.59)
 Trunk-to-head101.3 (0.5 to 2.0)70.9 (0.2 to 1.5)0.70 (0.27 to 1.84)
 Leg-to-head212.7 (1.5 to 3.8)162.0 (1.0 to 3.0)0.76 (0.40 to 1.46)
 Otder-head21
Heading duel (n=286)
 Head-to-head688.6 (6.5 to 10.6)668.3 (6.5 to 10.3)0.97 (0.69 to 1.36)
 Arm-to-head8410.6 (8.3 to 12.9)475.9 (4.2 to 7.6)0.56 (0.39 to 0.80)
 Shoulder-to-head60.8 (0.2 to 1.4)30.4 (0.0 to 0.8)0.50 (0.13 to 2.00)
 Trunk-to-head20.3 (−0.1 to 0.6)40.5 (0.0 to 1.0)2.00 (0.37 to 10)
 Leg-to-head30.4 (0.0 to 0.8)20.3 (−0.1 to 0.6)0.67 (0.11 to 4.00)
 Otder-head01
  • Rate is reported 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.