Table 1

Baseline characteristics

Body checking (n=49 teams)No body checking (n=33 teams)
InjuredNot injuredInjuredNot injured
*n=117 players*n=491 players*n=26 players*n=370 players
City and/or Province, n (%)
 Calgary2117.9513226.881350.0012032.43
 Edmonton9682.0535973.1200.0000.00
 Vancouver and Kelowna, British Columbia00.0000.001350.0025067.57
Year, n (%)
 2014–20156958.9732566.191350.0025067.57
 2015–20164841.0316633.811350.0012032.43
Sex, n (%)
 Male11396.5848498.5726100.0036498.38
 Female43.4271.4300.0061.62
Anthropometrics
 Height, cm median (Q1,Q3)162.60157.50, 172.70166.00157.50, 172.70167.60160.00, 175.92165.10157.50, 172.70
 Missing n (%)1714.539218.734(5.388222.16
 Weight, kg median (Q1,Q3)55.3045.36, 63.5053.5045.40, 61.2354.4048.00, 64.6354.4045.40, 63.50
 Missing2319.6610621.59726.9210127.30
Year of play, n (%)
 First6152.1326854.581453.8518148.92
 Second4941.8820641.96934.6216043.24
 Missing75.98173.46311.54297.84
Position, n (%)
 Forward6958.9725652.141453.8518148.92
 Defence4235.9013427.29311.5410027.03
 Goalie10.85499.9827.69267.03
 Missing54.275210.59726.926317.03
Previous injury† n (%)
 No7664.9633167.411557.6924566.23
 Yes3529.9112826.071142.317720.81
 Missing6(5.13326.5200.004812.97
Previous concussion‡ n (%)
 No6958.9733468.021350.0023964.59
 Yes4639.3214429.331350.0011631.35
 Missing data21.71132.6500.00154.05
  • Q1: first quartile Q3: third quartile.

  • *Sum of n is 1004, given that it is player-season (60 players participated in two seasons).

  • †Previous injury or concussion 12 months prior to baseline test.

  • ‡Previous concussion ever.