Declining mortality rates from ischemic heart disease in Australia

Area of Science:

• Cardiology
• Public Health
• Epidemiology

Background:

• Ischemic heart disease (IHD) is a leading cause of mortality in Australia.
• Australian IHD attack and mortality rates are notably high internationally.
• Significant shifts in IHD death rates occurred from the 1950s to 1980-81.

Purpose of the Study:

• To analyze trends in ischemic heart disease mortality in Australia.
• To investigate variations in IHD mortality decline across different population subgroups.
• To identify potential targets for further IHD mortality reduction strategies.

Main Methods:

• Retrospective analysis of Australian mortality data from the 1950s to 1980-81.
• Examination of IHD death rate trends across age groups, sexes, country of birth, geographic region, and occupation.
• Comparative analysis of mortality patterns between different demographic and socioeconomic subgroups.

Main Results:

• Overall IHD mortality declined by approximately 40% between 1965-7 and 1980-81.
• The decline pattern showed similarities across most age groups and sexes but varied significantly by subgroup.
• Australian-born men experienced greater declines than immigrants; professionals showed the largest decline among occupational groups.

Conclusions:

• While the overall decline in IHD mortality is encouraging, the precise causes remain unclear.
• Targeting subpopulations with higher mortality rates could lead to substantial further reductions.
• Addressing disparities in IHD mortality across various population segments is crucial for future control programs.