Table 1

Head impacts for per-protocol analysis

(A) Average (±SD) # of hits experienced above impact level
>20 g>50 g>100 g>150 g>200 g
No collar795.40±508.92145.85±109.9818.30±20.851.80±2.040.30±0.73
Collar896.43±600.03144.67±106.5514.38±11.292.43±3.110.43±1.17
(B) Average (±SD) of total g-forces experienced above impact level
>20 g>50 g>100 g
No collar30065.43±19850.5210656.89±8549.302377.46±2474.16
Collar32738.98±21873.8810486.55±7798.061824.30±1499.10
(C) Average g-force of hits above impact level
>20 g>50 g>100 g
No collar38.15±4.2471.35±5.52124.20±7.96
Collar36.58±3.0272.37±3.95125.29±9.85