Table 3.
Concussion Duration and After-Injury Changes in Symptom Scores and ImPACT Test Performance. Concussion Outcome Measures
| Subject ID | Days until cleared to begin RTP protocol | Change in symptom score | Change in verbal memory (%) | Change in visual memory (%) | Change in visual motor speed (%) | Change in reaction time (%) | Change in impulse control (%) |
|---|---|---|---|---|---|---|---|
| 2 | 1 | 0 | 1.0% | −9.0% | 23.0% | 4.0% | −33.0% |
| 7 | 10 | 19 | −14.0% | −24.0% | −17.0% | −2.0% | 71.0% |
| 8 | 12 | 36 | −26.0% | −19.0% | 5.0% | 23.0% | −20.0% |
| 10 | 8 | 4 | −11.0% | −10.0% | 19.0% | 8.0% | −25.0% |
| 27 | 3 | 0 | 8.0% | −25.0% | −24.0% | 26.0% | 56.0% |
| 32 | 4 | 43 | −20.0% | −20.0% | −65.0% | 23.0% | −22.0% |
| 32 | 8 | 3 | 6.0% | 4.0% | −56.0% | 8.0% | −36.0% |
| 35 | 3 | 3 | −5.0% | 9.0% | −13.0% | 16.0% | 50.0% |
| 36 | 1 | 16 | −18.0% | −9.0% | −33.0% | 1.0% | 82.0% |
| 37 | 4 | 0 | −12.0% | −3.0% | 18.0% | 5.0% | −33.0% |
| 38 | n/aa | ||||||
| 42 | 2 | 6 | 3.0% | −22.0% | 15.0% | −9.0% | 183.0% |
| 45 | 1 | 6 | 26.0% | 7.0% | 22.0% | −5.0% | −33.0% |
| 47 | 4 | 14 | −19.0% | −12.0% | −12.0% | 26.0% | 150.0% |
| 61 | 12 | 41 | −18.0% | −23.0% | 8.0% | 0.0% | −59.0% |
| 69 | 2 | 9 | 2.0% | −25.0% | −10.0% | 30.0% | 67.0% |
| 71 | 5 | 29 | −16.0% | 17.0% | −31.0% | 23.0% | 638.0% |
| 73 | 5 | 16 | −9.0% | −35.0% | −18.0% | −10.0% | 217.0% |
| 74 | 5 | 22 | 5.0% | 1.0% | −59.0% | 15.0% | 0.0% |
| 80 | 8 | 10 | −21.0% | 0.0% | −18.0% | −2.0% | 117.0% |
Positive change in symptom scores represent greater reported symptom severity. Declines in ImPACT test performance are represented by negative verbal memory, visual memory, and visual motor speed change scores and positive reaction time and impulse control change scores. ImPACT scores in bold represent a clinically meaningful change.
a
No follow-up testing was completed, as the athlete was disqualified from football for an orthopedic injury.