The health gap between disadvantaged and more affluent groups in Australia is continuing to widen, new research has found.

An analysis of data from the Australian Bureau of Statistics by Adelaide researchers shows the number of overweight and obese Australians is the highest on record and is highest among disadvantaged groups.

Rates of obesity, smoking, asthma, diabetes, cardiovascular disease and psychological distress are worst among the disadvantaged, who can also expect to die younger, shows the research by the Public Health Information Development Unit (PHIDU) at Torrens University.

Releasing the results earlier this week, PHIDU director Professor John Glover said it was hoped the information would provide more impetus for health policymakers to address the inequalities across society.