Table 4.

Relationship of head impact exposure metrics to postseason cognitive performance^a

Abbreviations: BVMT = Brief Visual Memory Test; CVLT = California Verbal Learning Test; DCWT = Delis-Kaplan Frontal Executive Systems Color Word Interference condition, seconds to complete; HIE = head impact exposure; HITsp = measure of head impact severity; LTR = Letter Fluency, Total Words; PASAT = Paced Auditory Serial Addition Task; TR4B = Trails 4/B; VIGRT = Gordon Continuous Performance Test, Vigilance Condition, Reaction Time; WRAT IV = Wide Range Achievement Test 4.

^aSummary of multiple linear regressions covarying for baseline score, WRAT IV-Reading (neuropsychological battery only), contact sport status, and days from preseason to postseason testing.

^bThe HIE variables included were number of hits, peak HITsp, peak linear acceleration, sum of linear acceleration (g), peak rotational acceleration (rads/s²), sum rotational acceleration (rads/s²), sum HITsp.

^cStatistically significant individual predictors were peak HITsp (r = −0.27), peak linear acceleration (g) (r = −0.25), peak rotational acceleration (rads/s²) (r = −0.27), and sum HITsp (r = −0.22).

^dStatistically significant individual predictor was peak linear acceleration (r = −0.19).