Motorsport studied: Indy Racing League (Indy-style race car)
Differences of Indy style race car crashes from those of standard automobiles:
(1) higher speeds
(2) excellent monitoring
(3) better driver protection
(4) better drivers
Head injury was defined as the presence of one or more of the following:
(1) concussion (loss of consciousness or altered mental status)
(2) anatomic injury on CT scan or MRI
(3) anatomic injury identified at surgery
The risk of head injury was very low if the G force was less than 50.
The logistic regression formula was:
X =
= (0.027 * (G force)) - 4.028
probability of head injury =
= 1 / (1 + EXP((-1) * X))
The authors reported the following probabilities of head injury and G force (page 248).
|
G Force
|
Probability of Head Injury
|
|
68 G
|
10%
|
|
149
|
50%
|
|
230
|
90%
|
If this data is analyzed n Minitab:
probability of head injury =
= (0.4938 * (G force)) - 23.58
