Table 5 Results from the univariate logistic regression to identify personality predictors (age 18) of persistent risky fast driving for males*

	Persistent driving fast for the thrill of it		Persistent driving over 120 km/h on the open road
	Odds ratio (95% CI)		Odds ratio (95% CI)
	(Lower to upper)		(Lower to upper)
Traditionalism
Medium	0.97 (0.43 to 2.21)	0.9	0.49 (0.28 to 0.87)	0.01
High	0.33 (0.10 to 1.11)	0.08	0.40 (0.20 to 0.79)	0.008
Harm Avoidance
Medium	0.84 (0.39 to 1.85)	0.7	0.65 (0.38 to 1.12)	0.1
High	0.47 (0.16 to 1.37)	0.2	0.53 (0.27 to 1.04)	0.06
Control
Medium	0.38 (0.17 to 0.84)	0.02	1.09 (0.60 to 2.00)	0.8
High	0.39 (0.15 to 1.01)	0.05	0.51 (0.24 to 1.11)	0.09
Aggression
Medium	5.14 (1.14 to 23.16)	0.03	1.30 (0.67 to 2.52)	0.4
High	10.93 (2.48 to 48.11)	0.002	1.81 (1.46 to 5.38)	0.002
Alienation
Medium	0.84 (0.29 to 2.44)	0.8	1.28 (0.64 to 2.56)	0.5
High	2.17 (0.76 to 6.25)	0.1	1.23 (0.57 to 2.65)	0.6
Stress Reaction
Medium	1.13 (0.40 to 3.20)	0.8	0.43 (0.24 to 0.78)	0.05
High	2.69 (0.92 to 7.86)	0.07	0.66 (0.33 to 1.29)	0.2
Well-Being
Medium	0.58 (0.25 to 1.33)	0.2	1.30 (0.68 to 2.47)	0.4
High	0.73 (0.30 to 1.80)	0.5	2.06 (1.05 to 4.02)	0.03
Social Potency
Medium	1.27 (0.57 to 2.86)	0.6	1.35 (0.75 to 2.44)	0.2
High	0.92 (0.35 to 2.45)	0.9	1.84 (0.98 to 3.47)	0.06
Achievement
Medium	0.60 (0.25 to 1.44)	0.3	0.74 (0.38 to 1.47)	0.4
High	0.46 (0.18 to 1.22)	0.1	1.07 (0.54 to 2.11)	0.9
Social Closeness
Medium	0.60 (0.25 to 1.44)	0.3	1.36 (0.72 to 2.58)	0.3
High	0.46 (0.18 to 1.21)	0.1	1.17 (0.62 to 2.21)	0.6