General characteristics of complete control and injured study cohorts (N = 56)a
| Physical | General | ||||||
|---|---|---|---|---|---|---|---|
| Age (n = 28) (yr) | Weight (n = 28) (lbs) | Height (n = 28) (in) | Y.I.S. (n = 28) (yr) | G.P.A. (n = 28) (4.0) | P.SRC (n = 28) (Total) | RTP (n = 24) (days) | |
| C | 17.9 (17.3–18.5) | 202 (188–217) | 72.0 (71.0–73.0) | 8.3 (7.2–9.5) | 3.3 (3.1–3.5) | 8 | NA |
| I | 17.7 (17.2–18.3) | 221 (199–243) | 71.6 (70.4–72.8) | 8.6 (7.3–9.8) | 3.1 (2.8–3.3) | 16 | 13.9 (11.3–16.5) range, 4–28 |
| P | .66 | .15 | .64 | .76 | .11 | .07 | NA |
Note:—Y.I.S. indicates years in sport; G.P.A., academic grade point average on a 4.0-point scale; P.SRC, number of previous sports-related concussions; C, control; I, injured; NA, not applicable.
↵a When appropriate, values are shown as mean and 95% confidence intervals of the distribution. P values from 2-tailed independent samples between the 2 cohorts are reported for all metrics. Due to skewness of the distribution, the P.SRC test statistics were computed using a Mann-Whitney U test. Return to play: 3 of the 24 injured subjects returned to play prior to the 8-day imaging visit.