Hazard ratios for driver injury during the prospective and retrospective periods, by indicators of socioeconomic status
| Prospective period | Retrospective period | |||
|---|---|---|---|---|
| Socioeconomic status | Number of cases* | Hazard ratio (95% CI)† | Number of cases* | Hazard ratio (95% CI)† |
| *One retrospective case also experienced a driver injury during the prospective period; only the first of these events was included in the analyses in table 2. | ||||
| †Adjusted for age and sex. | ||||
| Educational level | ||||
| University/polytechnic | 16 | 1.00 (reference) | 22 | 1.00 (reference) |
| Secondary >3 years | 18 | 1.81 (0.92 to 3.55) | 17 | 1.16 (0.62 to 2.19) |
| Secondary 2–3 years | 14 | 1.83 (0.89 to 3.76) | 25 | 2.44 (1.38 to 4.34) |
| Secondary <2 years | 6 | 1.12 (0.43 to 2.92) | 19 | 3.18 (1.68 to 6.01) |
| Missing | 1 | (p for trend =0.82) | 2 | (p for trend <0.0001) |
| Occupational status | ||||
| ISEI 60–85 | 5 | 1.00 (reference) | 9 | 1.00 (reference) |
| ISEI 40–59 | 10 | 1.77 (0.60 to 5.25) | 13 | 1.10 (0.46 to 2.60) |
| ISEI 30–39 | 10 | 1.60 (0.55 to 4.71) | 17 | 1.45 (0.64 to 3.26) |
| ISEI 20–29 | 23 | 4.48 (1.68 to 12.0) | 39 | 4.09 (1.95 to 8.59) |
| Missing | 7 | (p for trend =0.005) | 7 | (p for trend =0.0002) |
| Neighbourhood income | ||||
| NZ$40000–NZ$69700 | 7 | 1.00 (reference) | 8 | 1.00 (reference) |
| NZ $35000–NZ$39999 | 10 | 1.41 (0.53 to 3.70) | 21 | 2.57 (1.14 to 5.82) |
| NZ $27500–NZ$34999 | 12 | 1.33 (0.52 to 3.39) | 20 | 1.88 (0.83 to 4.29) |
| NZ $15000–NZ$27499 | 16 | 1.94 (0.79 to 4.76) | 17 | 1.70 (0.73 to 3.98) |
| Missing | 10 | (p for trend =0.18) | 19 | (p for trend =0.34) |