Projected socioeconomic disparities in the prevalence of obesity among Australian adults
Article first published online: 28 JUN 2012
© 2012 The Authors. ANZJPH © 2012 Public Health Association of Australia
Australian and New Zealand Journal of Public Health
Volume 36, Issue 6, pages 557–563, December 2012
How to Cite
Backholer, K., Mannan, H. R., Magliano, D. J., Walls, H. L., Stevenson, C., Beauchamp, A., Shaw, J. E. and Peeters, A. (2012), Projected socioeconomic disparities in the prevalence of obesity among Australian adults. Australian and New Zealand Journal of Public Health, 36: 557–563. doi: 10.1111/j.1753-6405.2012.00885.x
- Issue published online: 10 DEC 2012
- Article first published online: 28 JUN 2012
- Submitted: June 2011 Revision requested: November 2011 Accepted: February 2012
- socio-economic status;
Objective: To project prevalence of normal weight, overweight and obesity by educational attainment, assuming a continuation of the observed individual weight change in the 5-year follow-up of the national population survey, the Australian Diabetes, Obesity and Lifestyle study (AusDiab; 2000–2005).
Methods: Age-specific transition probabilities between BMI categories, estimated using logistic regression, were entered into education-level-specific, incidence-based, multi-state life tables. Assuming a continuation of the weight change observed in AusDiab, these life tables estimate the prevalence of normal weight, overweight and obesity for Australian adults with low (secondary), medium (diploma) and high (degree) levels of education between 2005 and 2025.
Results: The prevalence of obesity among individuals with secondary level educational attainment is estimated to increase from 23% in 2000 to 44% in 2025. Among individuals with a degree qualification or higher, it will increase from 14% to 30%. If all current educational inequalities in weight change could be eliminated, the projected difference in the prevalence of obesity by 2025 between the highest and lowest educated categories would only be reduced by half (to a 6 percentage point difference from 14 percentage points).
Conclusion: We predict that almost half of Australian adults with low educational status will be obese by 2025. Current trends in obesity have the potential to drive an increase in the absolute difference in obesity prevalence between educational categories in future years.
Implications: Unless obesity prevention and management strategies focus specifically on narrowing social inequalities in obesity, inequalities in health are likely to widen.