Characteristic | Value | Highest SES (n=5135) | Second quartile (n=5136) | Third quartile (n=5453) | Lowest SES (n=5082) | Total (n=20 806) |
n (%) | n (%) | n (%) | n (%) | n (%) | ||
Age (years) | 17 | 2246 (43.7) | 2438 (47.5) | 2831 (51.9) | 2613 (51.4) | 10 128 (48.7) |
18–19 | 2069 (40.3) | 1942 (37.8) | 1938 (35.6) | 1792 (35.3) | 7741 (37.2) | |
20–24 | 820 (16.0) | 756 (14.7) | 684 (12.54) | 677 (13.3) | 2937 (14.1) | |
Gender | Women | 2683 (52.3) | 2846 (55.4) | 2983 (54.7) | 2845 (56.0) | 11 357 (54.6) |
Men | 2452 (47.7) | 2290 (44.6) | 2470 (45.3) | 2237 (44.0) | 9449 (45.4) | |
Remoteness | Metropolitan | 5034 (98.0) | 4214 (82.1) | 3182 (58.3) | 3033 (59.7) | 15 463 (74.3) |
Inner regional | 100 (2.0) | 854 (16.6) | 2027 (37.2) | 1418 (27.9) | 4399 (21.2) | |
Outer regional/remote | 1 (0.0) | 68 (1.3) | 244 (4.5) | 631 (12.4) | 944 (4.5) | |
Attempts driver test | 1 | 3249 (63.3) | 3371 (65.6) | 3602 (66.1) | 3266 (64.3) | 13 488 (64.8) |
2 | 1276 (24.8) | 1152 (22.4) | 1300 (23.8) | 1234 (24.3) | 4962 (23.9) | |
3 or more | 599 (11.7) | 601 (11.7) | 531 (9.7) | 557 (11.0) | 2288 (11.0) | |
Missing | 11 (0.2) | 12 (0.2) | 20 (0.4) | 25 (0.5) | 68 (0.3) | |
Time on learner licence | <1 year | 1822 (35.5) | 1944 (37.9) | 2171 (39.8) | 1997 (39.3) | 7934 (38.1) |
1–1.5 years | 1803 (35.1) | 1826 (35.6) | 1930 (35.4) | 1857 (36.5) | 7416 (35.6) | |
>1.5 years | 1493 (29.1) | 1354 (26.4) | 1330 (24.4) | 1198 (23.6) | 5375 (25.8) | |
Missing | 17 (0.3) | 12 (0.2) | 22 (0.4) | 30 (0.6) | 81 (0.4) | |
Crash before study | No | 4994 (97.2) | 4972 (96.8) | 5253 (96.3) | 4893 (96.3) | 20 112 (96.7) |
Yes | 141 (2.8) | 164 (3.2) | 200 (3.7) | 189 (3.7) | 694 (3.3) | |
Self-rated driving ability compared with other drivers | Much better | 883 (17.2) | 909 (17.7) | 989 (18.1) | 953 (18.8) | 3734 (18.0) |
Better | 2236 (43.5) | 2148 (41.8) | 2301 (42.2) | 2083 (41.0) | 8768 (42.1) | |
Same | 1800 (35.1) | 1814 (35.3) | 1856 (34.0) | 1780 (35.0) | 7250 (34.9) | |
Worse or much worse | 90 (1.8) | 88 (1.7) | 94 (1.7) | 70 (1.4) | 342 (1.6) | |
Missing | 126 (2.5) | 177 (3.4) | 213 (3.9) | 196 (3.9) | 712 (3.4) | |
Lessons with professional driving instructor (hours) | Mean (SD) | 10.6 (14.8) | 9.5 (15.8) | 8.6 (13.6) | 8.3 (13.7) | 9.2 (14.6) |
Average driving (hours/week) | Mean (SD) | 6.8 (7.7) | 8.7 (11.9) | 9.2 (15.5) | 10.2 (18.3) | 8.7 (14.0) |
Alcohol audit summary score | 0–6 | 4366 (85.0) | 4298 (83.7) | 4544 (83.3) | 4250 (83.6) | 17 458 (83.9) |
>6 | 648 (12.6) | 676 (13.2) | 696 (12.8) | 640 (12.6) | 2660 (12.8) | |
Missing | 121 (2.4) | 162 (3.1) | 213 (3.9) | 192 (3.8) | 688 (3.3) | |
Cannabis smoking in last 12 months | Never | 4226 (82.3) | 4282 (83.4) | 4517 (82.8) | 4256 (83.7) | 17 281 (83.1) |
Once a month or less | 606 (11.8) | 512 (10.0) | 534 (9.8) | 445 (8.8) | 2097 (10.1) | |
2–4 times a month | 116 (2.3) | 97 (1.9) | 87 (1.6) | 100 (2.0) | 400 (1.9) | |
2–3 or 4+ per week | 61 (1.2) | 74 (1.4) | 89 (1.6) | 73 (1.4) | 297 (1.4) | |
Missing | 126 (2.4) | 171 (3.3) | 226 (4.1) | 208 (4.1) | 731 (3.5) | |
Self-harm in past 12 months | No | 4508 (87.8) | 4455 (86.7) | 4647 (85.2) | 4380 (86.2) | 17 990 (86.5) |
Yes | 354 (6.9) | 391 (7.6) | 423 (7.8) | 374 (7.4) | 1542 (7.4) | |
Missing | 273 (5.3) | 290 (5.7) | 383 (7.0) | 328 (6.4) | 1274 (6.1) | |
Risk taking | Low | 1660 (32.3) | 1699 (33.1) | 1845 (33.8) | 1652 (32.5) | 6856 (33.0) |
Medium | 1636 (31.9) | 1588 (30.9) | 1650 (30.3) | 1587 (31.2) | 6461 (31.1) | |
High | 1652 (32.2) | 1609 (31.3) | 1655 (30.4) | 1543 (30.4) | 6459 (31.0) | |
Missing | 187 (3.6) | 240 (4.7) | 303 (5.6) | 300 (5.9) | 1030 (5.0) | |
Risk perception | Low | 1303 (25.4) | 1510 (29.4) | 1725 (31.6) | 1679 (33.0) | 6217 (29.9) |
Medium | 1610 (31.4) | 1514 (29.5) | 1583 (29.0) | 1445 (28.4) | 6152 (29.6) | |
High | 2016 (39.3) | 1839 (35.8) | 1797 (33.0) | 1646 (32.4) | 7298 (35.1) | |
Missing | 206 (4.0) | 273 (5.3) | 348 (6.4) | 312 (6.1) | 1139 (5.5) | |
Sensation seeking | Low | 1585 (30.9) | 1546 (30.1) | 1632 (29.9) | 1497 (29.5) | 6260 (30.1) |
Medium | 1625 (31.6) | 1608 (31.3) | 1648 (30.1) | 1517 (29.8) | 6398 (30.7) | |
High | 1713 (33.4) | 1719 (33.5) | 1824 (33.6) | 1748 (34.4) | 7004 (33.7) | |
Missing | 212 (4.1) | 263 (5.1) | 349 (6.4) | 320 (6.3) | 1144 (5.5) |
NSW, New South Wales; SES, socioeconomic status.