Baseline characteristics for ice hockey players aged 15–17 years by years of bodychecking experience and injuries
| Characteristic | No. (%) of player-seasons with ≤ 2 yr bodychecking experience*† | No. (%) of player-seasons with ≥ 3 yr bodychecking experience*† | ||||
|---|---|---|---|---|---|---|
| Total n = 148 | With injuries‡ n = 27 | Without injuries n = 121 | Total n = 1020 | With injuries‡ n = 259 | Without injuries n = 761 | |
| City or area | ||||||
| Calgary | 141 (95.3) | 25 (92.6) | 116 (95.9) | 674 (66.1) | 156 (60.2) | 518 (68.1) |
| Calgary-surrounding area | 7 (4.7) | 2 (7.4) | 5 (4.1) | 47 (4.6) | 20 (7.7) | 27 (3.6) |
| Edmonton | 0 (0.0) | 0 (0.0) | 0 (0.0) | 299 (29.3) | 83 (32.0) | 216 (28.4) |
| Year | ||||||
| 2015–16 | 1 (0.7) | 0 (0.0) | 1 (0.8) | 489 (47.9) | 134 (51.7) | 355 (46.6) |
| 2016–17 | 3 (2.0) | 0 (0.0) | 3 (2.5) | 332 (32.6) | 78 (30.1) | 254 (33.4) |
| 2017–18 | 144 (97.3) | 27 (100.0) | 117 (96.7) | 199 (19.5) | 47 (18.2) | 152 (20.0) |
| Age, yr, median (Q1, Q3) | 15 (15, 15) | 15 (15, 15) | 15 (15, 15) | 16 (15, 16) | 16 (15, 16) | 16 (15, 16) |
| Sex | ||||||
| Male | 147 (99.3) | 27 (100.0) | 120 (99.2) | 1008 (99.1) | 258 (99.6) | 750 (98.6) |
| Female | 1 (0.7) | 0 (0.0) | 1 (0.8) | 6 (0.6) | 1 (0.4) | 5 (0.7) |
| Prefer not to respond or missing | 0 (0.0) | 0 (0.0) | 0 (0.0) | 6 (0.6) | 0 (0.0) | 6 (0.8) |
| Anthropometrics | ||||||
| Height, cm, median (Q1, Q3) | 175.7 (170.2, 180.3) | 176.1 (170.2,182.2) | 175.6 (170.2, 179.5) | 177.8 (172.7, 182.9) | 177.8 (172.7, 181.7) | 177.8 (172.7, 182.9) |
| Missing | 20 (13.5) | 4 (14.8) | 16 (13.2) | 145 (14.2) | 44 (17.0) | 101 (13.3) |
| Weight, kg, median (Q1, Q3) | 65.0 (59.0, 71.9) | 65.8 (58.9, 71.1) | 64.6 (59.0, 72.6) | 70.3 (63.5, 77.2) | 69.4 (63.2, 76.9) | 70.3 (64.0, 77.4) |
| Missing | 19 (12.8) | 4 (14.8) | 15 (12.4) | 144 (14.1) | 47 (18.2) | 97 (12.8) |
| Level of play | ||||||
| Elite (top 20%) | 50 (33.8) | 9 (33.3) | 41 (33.9) | 402 (39.4) | 94 (36.2) | 308 (40.5) |
| Subelite (lower 80%) | 98 (66.7) | 18 (66.7) | 80 (66.1) | 618 (60.6) | 165 (63.7) | 453 (59.5) |
| Year of play in this age group | ||||||
| First | 144 (97.3) | 26 (96.3) | 118 (97.5) | 376 (36.9) | 106 (40.9) | 270 (35.5) |
| Second | 4 (2.7) | 1 (3.7) | 3 (2.5) | 424 (41) | 103 (39.8) | 321 (42.2) |
| Third | 0 (0.0) | 0 (0.0) | 0 (0.0) | 220 (21.6) | 50 (19.3) | 170 (22.3) |
| Position | ||||||
| Forward | 86 (58.1) | 15 (55.6) | 71 (58.7) | 529 (51.9) | 144 (55.6) | 385 (50.6) |
| Defence | 44 (29.7) | 12 (44.4) | 32 (26.4) | 311 (30.5) | 83 (32.0) | 228 (30.0) |
| Goalie | 15 (10.1) | 0 (0.0) | 15 (12.4) | 92 (9.0) | 14 (5.4) | 78 (10.2) |
| Missing | 3 (2.0) | 0 (0.0) | 3 (2.5) | 88 (8.6) | 18 (7.0) | 70 (9.2) |
| Injury or concussion in previous 12 mo | ||||||
| No | 70 (47.3) | 13 (48.2) | 57 (47.1) | 387 (38.0) | 80 (30.4) | 307 (40.3) |
| Yes | 77 (52.0) | 14 (51.8) | 63 (52.1) | 436 (42.8) | 133 (51.4) | 303 (39.8) |
| Missing | 1 (0.7) | 0 (0.0) | 1 (0.8) | 197 (19.3) | 46 (17.8) | 151 (19.8) |
| Previous concussion ever | ||||||
| No | 71 (48.0) | 15 (55.6) | 56 (46.3) | 480 (47.1) | 100 (38.6) | 380 (49.9) |
| Yes | 58 (39.2) | 8 (29.6) | 50 (41.3) | 498 (48.8) | 150 (57.9) | 348 (45.7) |
| Missing | 19 (12.8) | 4 (14.8) | 15 (12.4) | 42 (4.1) | 9 (3.5) | 33 (4.3) |