Incidence rates and incidence rate ratios of elective and acute surgery by age and ethnic group
| Annual rate of change (%) | 95% CI | P value | Incidence rate ratio | 95% CI | P value | |
| Elective Surgery | ||||||
| Overall | 5.35 | 4.12 to 6.60 | 0.000 | – | – | – |
| By age group (years) | ||||||
| 60–69 | 5.63 | 4.31 to 6.96 | 0.000 | 1 | – | – |
| 70–79 | 5.05 | 4.09 to 6.02 | 0.000 | 1.32 | 1.23 to 1.42 | 0.000 |
| 80 and over | 5.57 | 4.10 to 7.06 | 0.000 | 1.21 | 1.11 to 1.32 | 0.000 |
| By ethnic group | ||||||
| Māori | 2.14 | −0.94 to 5.32 | 0.018* | 0.92 | 0.76 to 1.13 | 0.430 |
| Pacific | 4.22 | 1.29 to 7.24 | 0.363* | 0.65 | 0.54 to 0.77 | 0.000 |
| Asian | 5.62 | 2.80 to 8.51 | 0.818* | 0.48 | 0.41 to 0.57 | 0.000 |
| Other/European | 5.35 (ref) | 4.12 to 6.60 | – | 1 | – | – |
| Acute surgery | ||||||
| Overall | 0.11 | −1.12 to 1.36 | 0.857 | – | – | – |
| By age group | ||||||
| 60–69 | 0.09 | −1.01 to 1.01 | 0.8 | 1 | – | – |
| 70–79 | −1.16 | 0.06 to 2.26 | 0.040 | 1.40 | 1.22 to 1.60 | 0.000 |
| 80 and over | −1.29 | 0.55 to 2.02 | 0.001 | 2.67 | 2.34 to 3.08 | 0.000 |
| By ethnic group | ||||||
| Māori | −1.34 | −4.56 to 1.20 | 0.235* | 0.77 | 0.70 to 0.86 | 0.000 |
| Pacific | 0.43 | −2.37 to 3.31 | 0.908* | 0.89 | 0.83 to 0.97 | 0.006 |
| Asian | 0.25 | −2.50 to 3.08 | 0.961* | 0.52 | 0.48 to 0.56 | 0.000 |
| Other/European | 0.11 (ref) | −1.12 to 1.36 | – | 1 | – | – |
*Indicates whether change in incidence rate is significantly different to other/European (reference) population.