Table 4.

Computed tasks' associations to driving behavior (n = 182).

	Median [range]	On-road evaluation [Very good, good, moderate, poor]			Driving self-restriction score [0–20]
	n = 182	ß coefficient	R2	p-value	ß coefficient	R2	p-value
MedDrive (SCORE 0–100)
Visual processing (Task 1)	22.0 [0–67.3]	ß = −1.628	R2 = 0.062	P = 0.001	ß = −2.716	R2 = 0.020	P = 0.055*
Central visual processing	28.8 [0–75.7]	ß = −0.770	R2 = 0.029	P = 0.021	ß = −0.719	R2 = 0.003	P = 0.463*
Peripheral visual processing	23.0 [0–98.1]	ß = −0.886	R2 = 0.047	P = 0.003	ß = −1.511	R2 = 0.016	P = 0.088*
Dual tasking	10.8 [0–43.0]	ß = −1.282	R2 = 0.013	P = 0.122*	ß = −5.754	R2 = 0.031	P = 0.017
Execution with orientation cue (Task 2)	41.7 [0–75.3]	ß = −0.726	R2 = 0.021	P = 0.050*	ß = −2.688	R2 = 0.034	P = 0.013
Movement detection with attention shift (Task 3)	39.8 [0–76.2]	ß = −0.874	R2 = 0.033	P = 0.014	ß = −3.382	R2 = 0.054	P = 0.002
Working spatial memory (Task 4)	62.2 [0–85.8]	ß = −0.814	R2 = 0.019	P = 0.066*	ß = −3.343	R2 = 0.037	P = 0.009
Working memory—1st cue	61.0 [0–87.0]	ß = −0.447	R2 = 0.008	P = 0.240*	ß = −2.597	R2 = 0.030	P = 0.019*
Working memory—last cue	64.1 [0–100]	ß = −1.032	R2 = 0.031	P = 0.017*	ß = −3.036	R2 = 0.031	P = 0.017
MedDrive score	43.0 [7.4–66.0]	ß = −1.737	R2 = 0.053	P = 0.002	ß = −5.410	R2 = 0.061	P = 0.001
UFOV (ms)
Visual processing (ms)	16.7 [16.7–270]	ß = 0.649	R2 = 0.021	P = 0.048*	ß = 1.638	R2 = 0.016	P = 0.088*
Divided attention (ms)	.117 [16.7–500]	ß = 0.355	R2 = 0.012	P = 0.143*	ß = 1.893	R2 = 0.040	P = 0.007
Selective attention (ms)	263 [67–500]	ß = 0.864	R2 = 0.030	P = 0.020	ß = 1.800	R2 = 0.015	P = 0.099*
UFOV risk categories [0–5]	1 [0–5]	ß = 0.632	R2 = 0.026	P = 0.028	ß = 1.860	R2 = 0.027	P = 0.027
UFOVmod score (0–100)	49.7 [3.7–100]	ß = 0.780	R2 = 0.026	P = 0.029	ß = 2.920	R2 = 0.043	P = 0.005

Scores can be interpreted as percentages of full capacity. Measurements from UFOV were transformed to range from 0 to 1 making it possible to compare coefficients one to another across the same driving score. The ß coefficient corresponds to the average observed increase on the driving score between minimum and maximum testing values. For goodness of fit, we used the coefficient of determination R² indicating the proportion of shared variance. It ranges from 0 to 1, 1 been a perfect fit. P-values from likelihood ratio tests (LRtest) indicate the probability of the ß coefficient being null. ß, coefficient of regression; R², coefficient of determination; UFOV, useful field of view.

^*Was not significant when only accounting for values without imputation.