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Why do Australians live longer than New Zealanders?
B O'Donoghue1, P Howden-Chapman, A Woodward
1Wellington School of Medicine, University of Otago.
Summary
Australia now has a higher life expectancy than New Zealand, a reversal from pre-1970 trends. This divergence in mortality patterns is linked to economic factors and healthcare differences.
Area of Science:
- Public Health
- Demography
- Epidemiology
Background:
- Mortality patterns in Australia and New Zealand have historically differed.
- Recent trends indicate a divergence in life expectancy between the two nations.
Purpose of the Study:
- To compare mortality patterns in Australia and New Zealand.
- To investigate the reasons behind the changing life expectancy gap.
Main Methods:
- Utilized routinely collected data for comparative analysis.
- Examined mortality trends and life expectancy at birth.
Main Results:
- Life expectancy at birth is currently greater in Australia than in New Zealand.
- In 1996, the gap was 1.5 years for women and 1.1 years for men.
- Prior to 1970, New Zealand had lower mortality rates than Australia.
Conclusions:
- Slower economic growth in New Zealand may contribute to the divergence.
- Increased economic inequalities, particularly affecting the Māori population, are a potential factor.
- Modest differentials in healthcare may also play a role in the observed mortality differences.