Table 2.
Summary of the study population characteristics
| NO history of concussion | History of concussion | |
|---|---|---|
| Subjects | n = 292 | n = 93 |
| Age – Years: mean (95 % confidence interval) | 11.3 (11.2, 11.5) | 11.5 (11.3, 11.6) |
| Age Range | 10–14 years | 10–12 years |
| Age group 1 (10,11): frequency (proportion) | n = 179 (61 %) | n = 46 (49 %) |
| Age group 2 (12,13,14): frequency (proportion) | n = 113 (39 %) | n = 47 (51 %) |
| Sex: frequency (proportion) | M = 272 (93 %) | M =90 (97 %) |
| F = 20 (7 %) | F = 3 (3 %) | |
| Weight (kg): mean (95 % confidence interval) | M = 43.1 (41.9, 44.3) | M = 43.4 (41.4, 45.4) |
| F = 44.1 (40.4, 47.8) | F = 35.8 (27.6, 44.1) | |
| Height (cm): mean (95 % confidence interval) | M = 151.2 (150.2, 152.2) | M = 151.4 (149.8, 153.0) |
| F =151.3 (146.7, 155.9) | F = 145.5 (133.3, 157.6) | |
| Dominant Hand (proportion) | R = 258 (88 %) | R = 81 (87 %) |
| Hand: frequency (proportion) | L = 34 (12 %) | L = 12 (13 %) |
Subject characteristics with mean (95 % confidence intervals), range, and frequency (proportion) included