Rate ratios for first ventilation tube insertion procedures in Aboriginal compared with non-Aboriginal children in a cohort of children in New South Wales, Australia, 2000–2008, including stepwise adjustment for covariates
| Model | Adjusted for | Rate ratio | 95% CI | p Value |
|---|---|---|---|---|
| 1 | Null model | 0.72 | 0.64 to 0.80 | <0.001 |
| 2 | Age and sex | 0.72 | 0.64 to 0.80 | <0.001 |
| 3 | Age, sex, low birth weight | 0.71 | 0.63 to 0.79 | <0.001 |
| 4 | Age, sex, prematurity | 0.71 | 0.63 to 0.79 | <0.001 |
| 5 | Age, sex, private health insurance/patient | 0.96 | 0.86 to 1.08 | 0.532 |
| 6 | Age, sex, geographical remoteness | 0.81 | 0.73 to 0.91 | <0.001 |
| 7 | Age, sex, socioeconomic status* | 0.93 | 0.83 to 1.04 | 0.194 |
| 8 | Age, sex, low birth weight, prematurity, private patient/insurance, geographical remoteness, socioeconomic status* | 1.06 | 0.94 to 1.19 | 0.321 |
*Socioeconomic indices for Areas (SEIFA) Index of Relative Socio-Economic Advantage and Disadvantage based on statistical local area of residence at birth.