Table 2

Characteristics of incidents due to opponent-to-player contact (n=1421) from video analysis of all games (n=240 each season)

 201020112010 vs 2011
IncidentsRateIncidentsRateRate ratio
Duel type
 Heading duel21527.1 (23.5 to 30.8)17722.3 (19.1 to 25.6)0.82 (0.68 to 1.00)
 Tackling duel43755.2 (50.0 to 60.4)42453.5 (48.4 to 58.6)0.97 (0.85 to 1.11)
 Other duel8210.4 (8.1 to 12.6)8610.9 (8.6 to 13.2)1.05 (0.78 to 1.42)
Body location
 Head/neck22628.5 (24.8 to 32.3)18423.2 (19.9 to 26.6)0.81 (0.67 to 0.99)
 Upper extremity162.0 (1.0 to 3.0)162.0 (1.0 to 3.0)1.00 (0.50 to 2.00)
 Trunk9111.5 (9.1 to 13.9)10813.6 (11.1 to 16.2)1.18 (0.90 to 1.57)
Lower-extremity
 Thigh394.9 (3.4 to 6.5)567.1 (5.2 to 8.9)1.44 (0.95 to 2.16)
 Knee496.2 (4.5 to 7.9)394.9 (3.4 to 6.5)0.80 (0.52 to 1.21)
 Lower leg/ankle31339.5 (35.1 to 43.9)28435.9 (31.7 to 40.0)0.91 (0.77 to 1.07)
  • Incident 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.