Incidence rates by age group and division of play (adjusted for cluster)
| Injury rate | Division of play | Age group | ||||||
| Age group/division | Athlete exposure hours | Number of injuries* | Number of injuries/1000 player-hours | 95% CI | Incidence rate ratio | 95% CI | Incidence rate ratio | 95% CI |
| Atom | ||||||||
| All | 2956 | 3 | 1.0 | 0.3 to 3.0 | n/a | n/a | 1.0 | – |
| PeeWee | ||||||||
| B | 1070 | 1 | 0.9 | 0.2 to 4.0 | 1.0 | – | ||
| A | 2164 | 4 | 1.8 | 0.4 to 8.5 | 1.9 | 0.3 to 13.0 | ||
| All | 3234 | 5 | 1.5 | 0.4 to 5.0 | 1.5 | 0.3 to 6.6 | ||
| Bantam | ||||||||
| B | 3603 | 1 | 0.3 | 0.0 to 1.6 | 1.0 | – | ||
| A | 5078 | 8 | 1.6 | 0.8 to 2.9 | 5.6 | 0.9 to 33.4 | ||
| All | 8681 | 9 | 1.0 | 0.5 to 1.8 | 1.0 | 0.3 to 3.1 | ||
| Midget | ||||||||
| B | 1591 | 9 | 5.7 | 4.5 to 7.1 | 1.0 | – | ||
| A | 4376 | 7 | 1.6 | 0.7 to 3.2 | 0.2 | 0.1 to 0.5 | ||
| AAA | 6906 | 20 | 2.9 | 1.6 to 4.9 | 0.5 | 0.2 to 0.9 | ||
| All | 12873 | 36 | 2.8 | 1.8 to 4.3 | 2.7 | 0.9 to 8.0 | ||
| Total | 27744 | 53 | 1.9 | 1.4 to 2.7 | ||||
*Total injuries reported including multiple injuries in the same player.
n/a, not applicable.