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. 2004 Apr 10;328(7444):857. doi: 10.1136/bmj.37984.574757.EE

Table 1.

Sociodemographic, personal, and environmental characteristics of motorcycle crash related injury cases and population controls. Values are numbers (percentages)

Controls (n=1233) Cases (n=463)
Age (years)
15-19 131 (10.6) 86 (18.6)
20-24 322 (26.1) 148 (32.0)
≥25 780 (63.3) 229 (49.5)
Sex
Female 71 (5.8) 26 (5.6)
Male 1162 (94.2) 437 (94.4)
Type of motorcycle licence
Leamer 198 (16.1) 90 (19.4)
Restricted 97 (7.9) 34 (7.3)
Full 780 (63.3) 224 (48.4)
No licence, lapsed, or lost 125 (10.1) 100 (21.6)
Missing 1 (0.1) 6 (1.3)
Familiarity with specific motorcycle (km)
<1000 166 (13.5) 99 (21.4)
1000-10 000 477 (38.7) 179 (38.7)
>10 000 570 (46.2) 166 (35.9)
Missing 19 (1.5) 20 (4.3)
Any alcohol ingested in the previous 12 hours

Yes 129 (10.5) 92 (19.9)
No 1084 (87.9) 365 (78.8)
Missing 20 (1.6) 4 (0.9)
Posted speed limit (km/h)
50 693 (56.2) 307 (66.3)
70-80 93 (7.5) 40 (8.6)
100 447 (36.3) 111 (24.0)
Missing 0 5 (1.1)
Light conditions
Daylight 954 (77.4) 294 (63.5)
Dusk or dawn 104 (8.4) 49 (10.6)
Night 175 (14.2) 119 (25.7)
Missing 0 1 (0.2)
Weather conditions
Fine 804 (65.2) 333 (71.9)
Cloudy 370 (30.0) 76 (16.4)
Rain 59 (4.8) 49 (10.6)
Missing 0 5 (1.1)