Risk factor analyses for game-related injury, concussion and severe concussion in non-elite Pee Wee ice hockey in Alberta and Ontario (2011–2012)
| Risk factor | All injury | Severe injury (>7 days of time loss) | Concussion | Severe concussion (>10 days of time loss) | ||||
|---|---|---|---|---|---|---|---|---|
| Province | ||||||||
| Alberta | 2.97 | (1.33 to 6.61) | 1.72 | (0.75 to 3.95) | 2.83 | (1.09 to 7.31) | 1.99 | (0.60 to 6.68) |
| Ontario | 1 (Reference) | 1 (Reference) | 1 (Reference) | 1 (Reference) | ||||
| Year of play | ||||||||
| First | 1.80 | (1.10 to 2.93) | 0.92 | (0.54 to 1.57) | 3.06 | (1.52 to 6.15) | 1.35 | (0.60 to 3.04) |
| Second | 1 (Reference) | 1 (Reference) | 1 (Reference) | 1 (Reference) | ||||
| Previous injury | ||||||||
| Yes | 1.63 | (0.80 to 3.28) | 1.51 | (0.64 to 3.57) | NA | NA | ||
| No | 1 (Reference) | 1 (Reference) | NA | NA | ||||
| Previous concussion | ||||||||
| Yes | NA | NA | 3.16 | (1.86 to 5.39) | 2.68 | (1.28 to 6.00) | ||
| No | NA | NA | 1 (Reference) | 1 (Reference) | ||||
| Level of play | ||||||||
| Select (4–7) | 1.28 | (0.81 to 2.00) | 1.95 | (1.02 to 3.73) | 1.36 | (0.82 to 2.25) | 2.30 | (0.87 to 6.05) |
| House (8–11) | 1 (Reference) | 1 (Reference) | 1 (Reference) | 1 (Reference) | ||||
| Position | ||||||||
| Defense | 0.98 | (0.61 to 1.56) | 0.65 | (0.33 to 1.26) | 0.57 | (0.32 to 1.02) | 0.45 | (0.17 to 1.16) |
| Goalie | 0.09 | (0.01 to 0.67) | <0.001* | 0.22 | (0.05 to 1.05) | <0.001* | ||
| Forward | 1 (Reference) | 1 (Reference) | 1 (Reference) | 1 (Reference) | ||||
| Attitudes towards body checking | ||||||||
| High (>36/55) | 0.72 | (0.46 to 1.13) | 0.91 | (0.47 to 1.77) | 0.76 | (0.43 to 1.33) | 0.84 | (0.37 to 1.89) |
| Low (≤36/55) | 1 (Reference) | 1 (Reference) | 1 (Reference) | 1 (Reference) | ||||
Incidence rate ratios based on Poisson regression analysis offset for exposure hours and adjusted for clustering by team and covariates (year of play, previous injury or concussion, level of play, position of play, and attitudes towards body checking).
Severe incidence rate ratios based on Poisson regression analysis offset for exposure hours and adjusted only for clustering by team, owing to fewer injuries.
*Values very close to 0 due to the small amount of severe concussion and severe injuries.
NA, not applicable.