Table 1.
Sociodemographic characteristics of ARF cases and healthy controls.
| Variable | Cases |
Controls |
|||
|---|---|---|---|---|---|
| n = 124 | % | n = 372 | % | P* | |
| Age (years) | |||||
| <5 | 1 | 0·8 | 7 | 1·9 | |
| 5-9 | 36 | 31·5 | 135 | 36·3 | |
| 10-12 | 49 | 33·9 | 123 | 33·1 | |
| 13-15 | 31 | 27·4 | 86 | 23·1 | |
| 16-19 | 7 | 6·5 | 21 | 5·7 | |
| (mean, SD) | 11·0 | (95% CI: 10·5-11·5), SD 2·0 | 10·5 | (95% CI: 10·2-10·9), SD 3·2 | 0·162 |
| Sex | |||||
| Male | 81 | 65·3 | 200 | 53·8 | |
| Female | 43 | 34·7 | 172 | 46·2 | 0·025 |
| Ethnicity (prioritised6) | |||||
| Māori | 52 | 41·9 | 164 | 44·1 | |
| Pacific | 71 | 57·3 | 204 | 54·8 | |
| NZ European | 1 | 0·8 | 3 | 0·8 | |
| Other | 0 | 0·0 | 1 | 0·3 | 0·912 |
| Socioeconomic deprivation (NZDep136) | |||||
| 1-2 (least deprived) | 2 | 1·6 | 5 | 1·3 | |
| 3-4 | 7 | 5·7 | 14 | 3·8 | |
| 5-6 | 12 | 9·7 | 29 | 7·8 | |
| 7-8 | 20 | 16·1 | 79 | 21·2 | |
| 9-10 (most deprived) | 83 | 66·9 | 245 | 65·9 | 0·654 |
| Region (District Health Board) | |||||
| Auckland | 21 | 16·9 | 62 | 16·7 | |
| Bay of Plenty | 7 | 5·7 | 22 | 5·9 | |
| Capital and Coast | 2 | 1·6 | 9 | 2·4 | |
| Counties-Manukau | 52 | 41·9 | 155 | 41·7 | |
| Hawke's Bay | 3 | 2·4 | 9 | 2·4 | |
| Hutt Valley | 3 | 2·4 | 6 | 1·6 | |
| Lakes | 6 | 4·8 | 15 | 4·0 | |
| Northland | 5 | 4·0 | 15 | 4·0 | |
| Tairawhiti | 3 | 2·4 | 10 | 2·7 | |
| Waikato | 10 | 8·1 | 31 | 8·3 | |
| Waitemata | 12 | 9·7 | 38 | 10·2 | 0·999 |
⁎
Determined using Cochran-Mantel-Haenszel test for all variables except mean age, which was determined using a Student's t-test.