Table 2.

The value of the logistic regression parameters

	Estimate	Lower limit	Upper limit	Standard error	Wald X2	p-value
Simple variable analysis
Intercept	−5.35	−6.31	4.40	0.49	121.57	<0.0001
Delta V (km/h)	0.11	0.086	0.14	0.014	66.97	<0.0001
Intercept	−5.99	−7.07	−4.92	0.55	119.30	<0.0001
Mean acc. (g)	0.52	0.40	0.64	0.062	70.88	<0.0001
Intercept	−5.37	−6.31	−4.43	0.48	125.0	<0.0001
Peak acc. (g)	0.17	0.13	0.21	0.020	71.2	<0.0001
Multiple variable analysis
Intercept	−5.9	−6.96	−4.81	0.55	114.7	<0.0001
Delta V (km/h)	0.08	0.05	0.11	0.015	26.2	<0.0001
Peak acc. (g) x age (year)	0.0016	0.0016	0. 0024	0.00040	15.7	<0.0001