Table 1

Descriptive statistics for all risk factors (Pee Wee cohort 2007–2008 and Bantam cohort 2008–2009 season)

Pee WeeBantam
Alberta (n = 1091)Quebec (n = 1042)Alberta (n = 990)Quebec (n = 976)
Per cent wins, mean (SD)46.50 (14.77)45.61 (17.36)46.30 (18.12)46.15 (20.95)
Penalty minutes per game, mean (SD)8.21 (3.66)7.79 (2.30)12.31 (4.59)11.30 (2.96)
Weight, mean (SD)43.18 (8.39)44.35 (9.04)57.60 (10.61)59.89 (10.03)
Level of play*
Upper, n (%)413 (37.86)390 (37.43)374 (37.78)308 (31.56)
Lower, n (%)687 (62.14)652 (62.57)616 (62.22)668 (68.44)
Year of play in Pee Wee or Bantam
First year, n (%)484 (44.36)428 (41.07)417 (42.12)322 (32.99)
Second year, n (%)596 (54.63)590 (56.62)556 (56.16)642 (65.78)
Missing, n (%)11 (1.01)24 (2.30)17 (1.72)12 (1.23)
Previous injury (1 year)
Yes, n (%)213 (19.52)167 (16.03)339 (34.24)295 (30.23)
No, n (%)849 (77.82)870 (83.49)640 (64.65)672 (68.85)
Missing29 (2.66)5 (0.48)11 (1.11)9 (0.92)
Previous concussion (lifetime)
Yes, n (%)196 (17.97)130 (12.48)287 (28.99)164 (16.80)
No, n (%)866 (79.38)903 (86.66)679 (68.59)798 (81.76)
Missing, n (%)29 (2.66)9 (0.86)24 (2.42)14 (1.43)
Position
Forward, n (%)614 (56.28)581 (55.76)553 (55.86)526 (53.89)
Defense, n (%)328 (30.06)333 (31.96)312 (31.52)329 (33.71)
Goalie, n (%)131 (12.01)113 (10.84)109 (11.01)114 (11.68)
Missing, n (%)18 (1.65)15 (1.44)16 (1.62)7 (0.72)
  • * Level of play was defined within age group. In Pee Wee, the cohort included only the upper 60% of divisions of play overall; thus the study's upper level refers to top 20% and lower level referred to mid-40%. In Bantam, the cohort included only the upper 30% of divisions of play overall; thus the study's upper level includes the top 10% and lower level includes the next 20%.