Table 3.
The association between each measure of socio-economic position (SEP) and diet quality score, stratified by age; adults (n 9296; age ≥25 years) from the Australian Diabetes, Obesity and Lifestyle Study
| Aged ≤55 years | Aged >55 years | ||||||
|---|---|---|---|---|---|---|---|
| Indicator of SEP | Total (n) | β coefficient (model 2*) | 95 % CI | Rel. ineq.† (%) | β coefficient (model 2*) | 95 % CI | Rel. ineq.† (%) |
| Education | 9296 | ||||||
| Tertiary (Ref.) | 3517 | Ref. | 84·5 | Ref. | 89·8 | ||
| Completed secondary | 1764 | −3·4 | −4·3, −2·5 | −4·0 | −0·8 | −2·4, 0·7 | −1·0 |
| Some secondary | 3464 | −5·5 | −6·3, −4·7 | −6·5 | −1·9 | −3·1, −0·7 | −2·1 |
| Primary/never attended | 551 | −4·0 | −7·2, −0·7 | −4·9 | −2·9 | −4·5, −1·3 | −3·2 |
| P trend | <0·01 | <0·01 | |||||
| Equivalised household income (weekly) | 9296 | ||||||
| ≥$AU 701 (Ref.) | 2340 | Ref. | 83·1 | Ref. | 87·7 | ||
| $AU 465–700 | 1893 | −0·6 | −1·5, 0·3 | −0·7 | −2·5 | −4·7, −0·4 | −3·0 |
| $AU 230–465 | 2829 | −1·5 | −2·4, −0·6 | −1·8 | −1·1 | −2·6, 0·3 | −1·4 |
| ≤$AU 230 | 2234 | −3·0 | −4·1, −1·9 | −3·6 | −1·9 | −3·4, −0·4 | −2·2 |
| P trend | <0·01 | <0·05 | |||||
| SEIFA | 9296 | ||||||
| Q1 (Ref.) | 2284 | Ref. | 83·3 | Ref. | 89·4 | ||
| Q2 | 2332 | −0·1 | −1·1, 0·9 | −0·1 | −0·5 | −1·9, 0·9 | −0·6 |
| Q3 | 2394 | −1·4 | −2·4, −0·4 | −1·7 | −2·3 | −3·6, −1 | −2·6 |
| Q4 | 2286 | −3·6 | −4·6, −2·6 | −4·3 | −1·7 | −3·1, −0·4 | −1·9 |
| P trend | <0·01 | <0·01 | |||||
SEIFA, Socio-Economic Index for Areas; Q, quartile; Ref., reference category; DGI, Dietary Guideline Index.
*
Adjusted for age, sex, country of birth.
†
Relative inequality: for the reference SEP category the mean DGI score is reported. For all other SEP categories we report the proportionate difference in diet quality score relative to the reference group.