Distribution of sociodemographic factors in cases and controls, with estimated ORs for association with injury risk (OR of 1.0 indicates referent category)
| Cases (%) (n=148) | Controls (%) (n=130) | OR (95% CI) | |
|---|---|---|---|
| *Response obtained for 139 cases, 126 controls; ranges expressed in Australian dollars. | |||
| †Refers to parent answering questionnaire (mother in 81% of subjects). Response obtained for 147 cases, 129 controls; “secondary” category includes completion of technical (trade) certificate. | |||
| ‡According to Daniel scale15; highest category chosen if both parents' occupations reported and most recent job used if currently unemployed; response obtained for 144 cases, 129 controls. Cutpoints correspond to approximate tertiles in this population. | |||
| Sex | |||
| Girls | 21 | 30 | 1.0 |
| Boys | 79 | 70 | 1.6 (0.94 to 2.8) |
| Age (years) | |||
| 9–11 | 48 | 49 | 1.0 |
| 12–14 | 52 | 51 | 1.1 (0.66 to 1.7) |
| Income* | |||
| <$20 000 | 28 | 13 | 3.2 (1.5 to 6.6) |
| $20–30 000 | 25 | 25 | 1.6 (0.80 to 3.1) |
| $30–40 000 | 24 | 28 | 1.3 (0.70 to 2.6) |
| >$40 000 | 22 | 34 | 1.0 |
| Parent's education† | |||
| Primary | 23 | 19 | 3.3 (1.5 to 7.4) |
| Secondary | 67 | 54 | 3.3 (1.7 to 6.4) |
| Tertiary | 10 | 27 | 1.0 |
| Occupational prestige score‡ | |||
| 1–3.9 | 24 | 39 | 1.0 |
| 4–4.9 | 40 | 31 | 2.0 (1.1 to 3.7) |
| 5–7 | 36 | 30 | 1.9 (1.0 to 3.5) |