Incidence of end-stage renal disease in overseas-born, compared with Australian-born, non-indigenous Australians

Abstract

Background: Barriers to immigration from non-European sources were relaxed in the 1970s. As a result, more Australians are now of Middle Eastern, Asian or Pacific Islander origin, rather than British or European. Currently, overseas-born persons comprise one-third of non-indigenous Australians with end-stage renal disease (ESRD).

Methods: Using data recorded by the Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry, age-standardized incidence rates were calculated for ESRD due to all causes and to certain primary renal diseases for all non-indigenous Australians who were aged over 15 years when first treated for ESRD between 1993 and 2001. Truncated age-standardized incidence rates were calculated for ESRD due to glomerulonephritis by type.

Results: Immigrants from the British Isles and 'rest of Europe' had less, and those from the Pacific Island nations, East/South-East Asia, Indian subcontinent, Middle East and Southern Europe more ESRD from all causes than the Australian-born. Two diseases accounted for most of the excess: Type 2 diabetic nephropathy and glomerulonephritis (the latter not significant for the Indian-born). There was a small excess (not always significant) of hypertensive/arteriopathic renal disease in Asian- and Middle Eastern-born persons. The East/South-East Asian-born had the highest rates of ESRD due to mesangial immunoglobulin A (IgA) disease and lupus nephritis, and the Middle Eastern-born the highest rates from focal sclerosing glomerulonephritis.

Conclusion: For Australians born in the Pacific Island nations, Asia, the Middle East or Southern Europe, excess prevalence of, and/or susceptibility to, diseases that cause ESRD has more than offset any 'healthy migrant' effect.