Average annual total income and work income over time for injured (n=21 639) and comparison (n=596 133) ‘participants’
| Geometric mean (GM; $NZ) | Relative difference (injured/comparison) | |||
| Injured | Comparison | Crude GM ratio | 95% CI | |
| Total income | ||||
| Baseline | 39 950 | 38 962 | 1.025 | (1.016 to 1.035) |
| Year 1 | 38 583 | 38 812 | 0.994 | (0.985 to 1.004) |
| Year 2 | 38 135 | 39 747 | 0.959 | (0.949 to 0.969) |
| Year 3 | 37 262 | 39 226 | 0.950 | (0.939 to 0.961) |
| Work income* | ||||
| Baseline | 37 806 | 35 939 | 1.052 | (1.041 to 1.063) |
| Year 1 | 23 842 | 28 277 | 0.843 | (0.822 to 0.865) |
| Year 2 | 18 371 | 24 452 | 0.751 | (0.724 to 0.779) |
| Year 3 | 15 197 | 20 282 | 0.749 | (0.719 to 0.780) |
*A small constant (+$1) was added to each participant’s work income so that the GM could be calculated for participants with no work income.