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Are Aboriginal people more likely to be diagnosed with more advanced cancer?

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Australian Aboriginal people have poorer survival than non-Aboriginal people after diagnosis of most cancer types.1 Spread of disease at diagnosis is a major prognostic factor for cancer, and differences in spread of disease partly explain the disparities in cancer survival between Aboriginal and non-Aboriginal people.1,2

For all cancers combined, Aboriginal people are more likely to have advanced disease at diagnosis than non-Aboriginal people.1,2 However, the incidences of cancers that tend to present at a later stage, such as lung cancer, are higher in Aboriginal people, while the incidences of other cancers, such as melanoma, which are predominantly localised when diagnosed, are lower in Aboriginal people than non-Aboriginal people.1,2

Studies have examined differences in spread of disease at diagnosis between Aboriginal and non-Aboriginal people for individual cancer types, but the results have been inconsistent across studies and cancer types.37 While incidence by spread of disease has been reported separately for Aboriginal and non-Aboriginal…