Table 1

Sample demographics and risk factor percentages by socioeconomic status

Characteristic	Value	Total (N=20 822)	Socioeconomic status
			High	Moderate	Low
			(n=6970)	(n=6895)	(n=6957)
Sex	Male	45.4	46.6	45.6	44.0
Age (years)	17	48.7	44.5	51.0	50.6
	18–19	37.2	39.4	36.2	36.0
	20–24	14.1	16.1	12.8	13.4
Rurality of residence	Urban	74.3	95.3	65.1	62.4
	Regional	21.1	4.7	32.1	26.8
	Rural	4.5	0.0	2.8	10.8
Risk-driving behaviour	Low	34.7	34.0	35.0	35.0
	Moderate	32.7	32.7	32.6	32.7
	High	32.7	33.3	32.4	32.3
Sensation-seeking behaviour	Low	31.9	32.0	31.5	32.1
	Moderate	32.5	33.0	32.9	31.7
	High	35.6	35.0	35.7	36.2
Alcohol dependency	High	13.2	12.9	14.3	12.5
Sleep hours per day	Less than 7	18.7	18.6	18.1	19.5
	7	30.5	33.0	29.8	28.6
	8	31.9	31.2	32.8	31.7
	9+	18.9	17.3	19.4	20.2
Driving hours per week	0–2	19.6	24.2	17.6	17.0
	3–5	18.6	20.4	18.2	17.0
	6–9	29.5	28.5	30.0	29.8
	10+	32.4	26.9	34.2	36.2
Times driven before Learner licence	0	44.0	46.5	42.4	43.0
	1–5	26.0	29.3	24.9	23.7
	6+	30.0	24.2	32.7	33.3
Time on Learner licence (years)	Less than 1	38.3	36.3	39.3	39.3
	1–1.4	35.8	35.5	35.8	36.1
	1.5+	25.9	28.2	24.9	24.7
Professional supervised driving hours on Learner licence	0	17.9	14.1	17.7	21.8
	1–4	29.0	25.8	31.5	29.8
	5–8	21.2	22.6	21.6	19.2
	9+	31.9	37.5	29.2	29.1
Non-professional supervised driving hours on Learner licence	Less than 40	20.2	21.5	18.0	21.1
	40–49	14.8	16.7	14.0	13.5
	50–59	25.9	26.3	26.3	24.9
	60–69	15.7	15.0	16.7	15.4
	70+	23.5	20.4	25.0	25.1