Birth characteristics and first VTI procedure rates in a cohort of children in New South Wales, Australia, 2000–2008
| Non-Aboriginal | Aboriginal | Non-Aboriginal | Aboriginal | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Per cent | N | Per cent | Number of VTI | Person-years | IR* | 95% CI | No. VTI | Person-years | IR* | 95% CI | |
| Total | 636 719 | 100 | 16 831 | 100 | 16 781 | 2 916 105 | 5.8 | 5.7 to 5.8 | 310 | 72 663 | 4.3 | 3.8 to 4.8 |
| Sex | ||||||||||||
| Female | 308 579 | 48 | 8221 | 49 | 6395 | 1 418 529 | 4.5 | 4.4 to 4.6 | 120 | 35 655 | 3.4 | 2.8 to 4.0 |
| Male | 328 140 | 52 | 8610 | 51 | 10 386 | 1 497 577 | 6.9 | 6.8 to 7.1 | 190 | 37 008 | 5.1 | 4.4 to 5.9 |
| Low birth weight (<2500 g) | ||||||||||||
| No | 614 308 | 96 | 15 763 | 94 | 16 051 | 2 820 959 | 5.7 | 5.6 to 5.8 | 282 | 68 483 | 4.1 | 3.7 to 4.6 |
| Yes | 22 411 | 4 | 1068 | 6 | 730 | 95 147 | 7.7 | 7.1 to 8.3 | 28 | 4179 | 6.7 | 4.5 to 9.7 |
| Premature birth (<37 weeks’ gestational age) | ||||||||||||
| No | 599 380 | 94 | 15 245 | 91 | 15 542 | 2 754 484 | 5.6 | 5.6 to 5.7 | 272 | 66 331 | 4.1 | 3.6 to 4.6 |
| Yes | 37 339 | 6 | 1586 | 9 | 1239 | 161 621 | 7.7 | 7.2 to 8.1 | 38 | 6332 | 6.0 | 4.2 to 8.2 |
| Private patient or private health insurance | ||||||||||||
| No | 447 817 | 70 | 16 605 | 99 | 8661 | 2 072 256 | 4.2 | 4.1 to 4.3 | 303 | 71 818 | 4.2 | 3.8 to 4.7 |
| Yes | 188 902 | 30 | 226 | 1 | 8120 | 843 850 | 9.6 | 9.4 to 9.8 | 7 | 845 | 8.3 | 3.3 to 17.1 |
| Remoteness (ARIA+) | ||||||||||||
| Major city | 421 287 | 66 | 4945 | 29 | 11 553 | 1 917 085 | 6.0 | 5.9 to 6.1 | 101 | 21 171 | 4.8 | 3.9 to 5.8 |
| Inner regional | 158 346 | 25 | 5815 | 35 | 4264 | 731 689 | 5.8 | 5.7 to 6.0 | 125 | 24 708 | 5.1 | 4.2 to 6.0 |
| Outer regional | 52 032 | 8 | 4226 | 25 | 871 | 242 980 | 3.6 | 3.4 to 3.8 | 69 | 18 328 | 3.8 | 2.9 to 4.8 |
| Remote/very remote | 5054 | 1 | 1845 | 11 | 93 | 24 351 | 3.8 | 3.1 to 4.7 | 15 | 8456 | 1.8 | 1.0 to 2.9 |
| Area socioeconomic status† | ||||||||||||
| First quintile (most disadvantaged) | 120 604 | 19 | 8234 | 49 | 1976 | 560 732 | 3.5 | 3.4 to 3.7 | 130 | 36 376 | 3.6 | 3.0 to 4.2 |
| Second quintile | 138 822 | 22 | 4412 | 26 | 3277 | 638 688 | 5.1 | 5.0 to 5.3 | 102 | 18 715 | 5.5 | 4.4 to 6.6 |
| Third quintile | 128 511 | 20 | 2736 | 16 | 2960 | 592 752 | 5.0 | 4.8 to 5.2 | 52 | 11 635 | 4.5 | 3.3 to 5.9 |
| Fourth quintile | 130 018 | 20 | 1146 | 7 | 3412 | 592 662 | 5.8 | 5.6 to 6.0 | 18 | 4816 | 3.7 | 2.2 to 5.9 |
| Fifth quintile (least disadvantaged) | 118 764 | 19 | 303 | 2 | 5156 | 531 272 | 9.7 | 9.4 to 10.0 | 8 | 1121 | 7.1 | 3.1 to 14.1 |
*Per 1000 person-years.
†SEIFA Index of Relative Socio-Economic Advantage and Disadvantage based on the child's statistical local area of residence at birth.
ARIA+, Accessibility/Remoteness Index of Australia; IR, incidence rate; SEIFA, socio-economic indices for Areas; VTI, ventilation tube insertion.