Table 4

Tackler side/behind proficiency results: injury versus non-injury (includes means±SD, % score for total number of events for which criteria score was satisfied, p values and effect sizes with interpretations)

I (n=15)Per centNI (n=69)Per centp ValueEffect sizeInterpretation
Precontact
 Identify/track ball-carrier1.00±0.001001.00±0.001001.000.00None
 Body position—upright-to-low (dipping)0.33±0.49330.42±0.50420.540.18Trivial
 Straight back, centre of gravity forward of support base0.73±0.46730.83±0.38830.410.24Small
 Head up and forward/face up1.00±0.001001.00±0.001001.000.00None
 Shortening steps0.53±0.52530.68±0.47680.280.30Small
Overall precontact0.72±0.29720.79±0.24790.700.26Small
Contact
 Explosiveness on contact0.40±0.51400.72±0.45720.02*0.67Moderate
 Contact in centre of gravity0.07±0.2670.54±0.5054<0.01*1.18Moderate
 Head placement on correct side/behind ball-carrier0.87±0.35870.91±0.28910.590.13Small
Overall contact0.44±0.40440.72±0.19720.340.89Moderate
Postcontact
 Shoulder usage (drive into contact)0.00±0.0000.28±0.45280.02*0.88Moderate
 Arm usage (punch forward and wrap, ie, hit-and-stick)0.27±0.46270.64±0.4864<0.01*0.79Moderate
 Pull ball-carrier with arms to ground0.27±0.46270.83±0.3883<0.01*1.33Large
 Release ball-carrier and compete for possession0.00±0.0000.30±0.46300.01*0.92Moderate
Overall postcontact0.13±0.15130.51±0.27510.051.74Large
Total5.47±1.60468.14±1.7568<0.01*1.59Large
  • *Statistical significance (p<0.05).

  • I, injury; NI, non-injury.