Table 1.
Median head kinematic measures for individual players (n = 95) on days with and without diagnosed concussion. Players diagnosed with concussion sustain impacts with higher associated kinematics on days of diagnosed concussion than days without.
| Impact Kinematics | Non-Concussion Days | Concussion Days | P Value | ||
|---|---|---|---|---|---|
| Median | 25–75% interquartile range | Median | 25–75% interquartile range | ||
| 50th Percentile | |||||
| Peak Lin Acc (g) | 20.7 | 19.5 – 22.0 | 22.5 | 19.3 – 26.5 | < 0.001 |
| Peak Rot Acc (rad/s2) | 848 | 799 – 922 | 874 | 723 – 1,040 | 0.08 |
| HIC15 | 4.0 | 4.0 – 5.0 | 5.0 | 3.1 – 7.0 | < 0.001 |
| GSI | 6.0 | 5.1 – 7.0 | 8.0 | 5.6 – 11 | < 0.001 |
| Δv (m/s) | 0.77 | 0.71 – 0.81 | 0.79 | 0.69 – 0.97 | 0.002 |
| 95th Percentile | |||||
| Peak Lin Acc (g) | 63.5 | 56.4 – 69.0 | 82.0 | 66.5 – 95.4 | < 0.001 |
| Peak Rot Acc (rad/s2) | 2,761 | 2,448 – 3,011 | 3,376 | 2,632 – 4,154 | < 0.001 |
| HIC15 | 62.7 | 48.9 – 79.3 | 130.0 | 75.1 – 195.8 | < 0.001 |
| GSI | 94.4 | 73.8 – 121.6 | 190.2 | 116.6 – 277.8 | < 0.001 |
| Δv (m/s) | 2.31 | 2.08 – 2.50 | 2.93 | 2.47 – 3.70 | < 0.001 |