Final multivariable model: associations between presentinel injury work-related factors and work-related subsequent injury*
| Variable | RR (95% CI) | P value | Overall p value |
| Age (years) | |||
| 18–29 | 1.14 (0.87 to 1.50) | 0.35 | |
| 30–49 | Ref | ||
| 50–64 | 1.25 (1.00 to 1.57) | 0.05 | 0.14 |
| Sex | |||
| Male | Ref | ||
| Female | 0.88 (0.67 to 1.16) | 0.35 | 0.35 |
| Occupational group | |||
| Professional | Ref | ||
| Technical | 1.03 (0.69 to 1.53) | 0.89 | |
| Trade/manual | 1.34 (0.98 to 1.82) | 0.07 | |
| Unclassified | 0.72 (0.34 to 1.53) | 0.39 | 0.07 |
| Ethnicity (prioritised) | |||
| Sole New Zealand European | Ref | ||
| Māori | 0.97 (0.73 to 1.29) | 0.85 | |
| Pacific | 1.39 (1.00 to 1.95) | 0.05 | |
| Other | 1.27 (0.98 to 1.64) | 0.07 | 0.09 |
| Household income | |||
| Adequate | Ref | ||
| Not adequate | 1.33 (1.02 to 1.74) | 0.04 | 0.04 |
| Lower extremity fracture | |||
| No | Ref | ||
| Yes | 0.67 (0.44 to 1.02) | 0.06 0.06 | 0.06 |
| Painful/tiring positions | |||
| Never | Ref | ||
| Up to half the time | 1.10 (0.87 to 1.39) | 0.45 | |
| More than half the time | 0.76 (0.54 to 1.08) | 0.12 | 0.08 |
| Carrying/moving heavy loads | |||
| Never | Ref | ||
| Up to half the time | 1.15 (0.85 to 1.57) | 0.36 | |
| More than half the time | 1.42 (1.01 to 2.01) | 0.05 | 0.10 |
| Physical exertion more than walking | |||
| Never | Ref | ||
| Up to half the time | 0.98 (0.73 to 1.31) | 0.88 | |
| More than half the time | 1.27 (0.93 to 1.74) | 0.13 0.07 |
*At least one work-related subsequent injury claim in the 24 months of follow-up; 3.7% of participants had missing data in one or more explanatory variable and were excluded from this multivariable analysis.