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Poverty is one of the strongest determinants of health, regardless of immigration status, according to a new study from U of T's Dalla Lana School of Public Health and the Institute for Clinical Evaluative Sciences (ICES).

“What our study found was despite the healthy immigrant effect, those living in the most deprived areas, irrespective of immigration status had the highest mortality rates,” says Laura Rosella (pictured below), the study’s lead author who is an assistant professor of epidemiology at U of T and a scientist at ICES.

“These findings support the need to better examine the factors that drive these inequalities to ensure equitable health for the totality of the population.”

The “healthy immigrant effect” refers to a trend where new immigrants to Canada are healthier than the Canadian population, but over time and successive generations, their health as well as that of their children and grandchildren tends to decline.

In the study, published today in , the researchers examined data representing all deaths in Ontario from 2002 to 2012 to analyze how socioeconomic factors impact mortality according to immigration status.

The study found:

• All-cause and premature mortality were about 60 per cent lower among immigrants compared to Canadian or long-term residents. Over the 10-year study period, this translated into 42,700 fewer deaths overall and 18,400 fewer premature deaths in immigrants compared to Canadian-born or long-term residents.
• The average age at death for female and male immigrants was approximately six years younger than that of female and male long-term residents.
• For both immigrants and non-immigrants, those living in the most deprived areas had higher rates of all-cause and premature mortality, although immigrant mortality was lower across all levels.
• The advantage in all-cause and premature mortality among male immigrants over male long-term residents was slightly more pronounced than the advantage among female immigrants over female long-term residents.