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Mortality from all causes, and from ischaemic heart disease, in the Australian capital cities
Insights
Mortality rates from all causes and ischemic heart disease were higher in Brisbane and Sydney compared to other Australian cities. These excess deaths, primarily from coronary disease, remain unexplained by water softness or magnesium levels.
Area of Science:
- Epidemiology
- Public Health
- Environmental Health
Background:
- Geographic variations in mortality rates exist within Australia.
- Ischemic heart disease is a significant cause of death globally and nationally.
Purpose of the Study:
- To compare mortality rates from all causes and ischemic heart disease across Australian capital cities.
- To investigate potential correlations between mortality and water quality parameters.
Main Methods:
- Comparative analysis of mortality data from 1970-1972.
- Statistical comparison of death rates between six Australian capital cities.
- Assessment of water softness and magnesium content in relation to mortality figures.
Main Results:
- Brisbane and Sydney exhibited significantly higher overall and ischemic heart disease mortality rates.
- Coronary disease accounted for the majority of excess deaths in Brisbane and Sydney.
- No significant relationship was found between mortality rates and water softness or magnesium levels.
Conclusions:
- Geographic disparities in ischemic heart disease mortality exist in Australia, particularly in Brisbane and Sydney.
- The causes for these elevated mortality rates in specific cities are currently unexplained.
- Further research is needed to identify the factors contributing to these observed differences.
Abstract:
A comparison was made of mortality from all causes, and from ischaemic heart disease, in the six Australian capital cities, for the years 1970, 1971 and 1972. Both rates were significantly higher in Brisbane and Sydney than in the other cities. Ninety per cent of the excess deaths in Brisbane men, and a large part of the excess deaths in Brisbane women and Sydney people of both sexes, were due to coronary disease. There was no relationship between either total or coronary mortality, and water softness or its magnesium content. So far these differences are unexplained.