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Summary
This study compares asthma data from two Australian surveys, finding a slight male predominance in infancy and old age, potentially linked to androgens. Asthma onset peaks in spring and autumn, with a general decrease in occurrence over time.
Area of Science:
- Epidemiology
- Respiratory Medicine
- Public Health
Background:
- Asthma prevalence and onset patterns require ongoing investigation.
- Understanding demographic shifts in asthma is crucial for public health.
- Previous Australian data provides a baseline for current trends.
Purpose of the Study:
- To analyze trends in asthma onset and general practitioner attendances in Australia.
- To compare asthma data between the 1962-63 National Morbidity Survey and the 1969-1974 Australian General Practitioner's Morbidity and Prescribing Survey.
- To investigate demographic and seasonal factors influencing asthma occurrence.
Main Methods:
- Comparative analysis of two national Australian morbidity surveys.
- Examination of patient demographics, including age and sex.
- Analysis of seasonal and geographical distribution of asthma cases.
Main Results:
- A slight male predominance in asthma was observed, particularly in infancy and old age.
- Asthma onset was more frequent during autumn and spring.
- A relative decrease in asthma occurrence compared to other diseases was noted.
- A shift from higher prevalence in metropolitan to non-metropolitan areas was observed.
Conclusions:
- Hormonal factors, such as androgens, may play a role in asthma susceptibility.
- Females may possess a genetic advantage regarding asthma.
- Asthma presentation exhibits seasonal patterns and evolving geographical distribution.
- The overall relative incidence of asthma appears to be declining.