TABLE 4.

Cox proportional hazards—Speed scores added to model

Variable	Coefficient	SE	Hazard ratio	CI	Z	P‐value
Animals—raw	−0.04	0.01	0.96	(0.94–0.97)	−5.05	< 0.0001
Letter F—raw	0.00	0.01	1.00	(0.98–1.02)	0.09	0.93
Animals—speed	−0.17	0.03	0.85	(0.80–0.90)	−5.35	< 0.0001
Letter F—speed	−0.08	0.04	0.92	(0.85– 0.99)	−2.09	0.04
Age	0.01	0.01	1.01	(1– 1.02)	1.33	0.18
Sex (M)	−0.04	0.08	0.96	(0.82–1.13)	−0.48	0.63
Some college	0.17	0.14	1.18	(0.89–1.57)	1.14	0.25
College+	0.09	0.15	1.10	(0.82–1.46)	0.63	0.53
HS graduate	0.07	0.14	1.07	(0.81–1.41)	0.50	0.62
Race (W)	−0.01	0.09	0.99	(0.83–1.18)	−0.13	0.90
Region (BELT)	−0.11	0.09	0.89	(0.75–1.07)	−1.21	0.23
Region (BUCKLE)	−0.06	0.11	0.95	(0.77– 1.17)	−0.52	0.61

Abbreviations: CI, 95% confidence interval of hazard ratio; HS, high school; M, male; SE, standard error; W, White.

Note: Concordance = 0.599.