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Related Experiment Videos

Why are deaths from asthma increasing?

M R Sears

    European Journal of Respiratory Diseases. Supplement
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Asthma mortality is increasing in younger populations globally, particularly in New Zealand. This study confirms the rise is real, not an artifact, with significant racial disparities in mortality rates.

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    Area of Science:

    • Epidemiology
    • Public Health
    • Respiratory Medicine

    Background:

    • Asthma mortality rates have shown slow declines globally since 1960, with recent increases in some countries.
    • Specific age groups and regions, including New Zealand (5-34 year olds), the western US (older subjects), and Canada (5-34 year olds), have experienced notable increases in asthma deaths.
    • Mortality trends in England and Wales for 15-44 year olds show differing patterns for males and females, with male rates not improving since 1960.

    Purpose of the Study:

    • To investigate verified asthma mortality rates in New Zealand, comparing them with England.
    • To identify potential causes for the observed increase in asthma mortality, especially in younger age groups.
    • To examine racial disparities in asthma mortality within New Zealand.

    Main Methods:

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    • A 2-year national study analyzed deaths certified as asthma-related in New Zealand patients under 70.
    • Verified asthma mortality rates were compared between racial groups in New Zealand (Maoris, Pacific Island Polynesians, Europeans).
    • Certification accuracy was assessed, and its impact on mortality statistics was evaluated for New Zealand and England.

    Main Results:

    • New Zealand exhibited significant differences in verified asthma mortality rates among racial groups: Maoris (18.9), Pacific Island Polynesians (9.4), and Europeans (3.4 per 100,000).
    • Higher non-European rates accounted for 36% of the excess mortality in New Zealand compared to England.
    • Certification errors led to a 13% overestimate of asthma mortality overall, but accuracy was high for the 5-34 age group, confirming the real increase in deaths.

    Conclusions:

    • The observed increase in asthma mortality among younger individuals is a genuine and substantial public health concern.
    • While common factors like poor compliance and inadequate treatment were noted, no single cause explains the higher mortality in New Zealand compared to England.
    • Significant racial disparities in asthma mortality exist within New Zealand, contributing to the overall excess mortality.