Study type

Study type

Non-interventional study

Scope of the study

Disease epidemiology
Non-interventional study

Non-interventional study design

Cohort
Study drug and medical condition

Medical condition to be studied

Asthma
Population studied

Age groups

  • Adult and elderly population (≥18 years)
    • Adults (18 to < 65 years)
      • Adults (18 to < 46 years)
      • Adults (46 to < 65 years)
    • Elderly (≥ 65 years)
      • Adults (65 to < 75 years)
      • Adults (75 to < 85 years)
      • Adults (85 years and over)

Estimated number of subjects

7868
Study design details

Main study objective

The main objective of this study is the analysis and categorisation of the Australian adult population diagnosed with asthma.

Outcomes

The primary outcome of this study is to define and describe the demographics of the Australian adult population diagnosed with asthma based various factors including their age, GINA step/category, exacerbation frequency and oral corticosteroid usage patterns across Australia. The secondary objective was to identify the extent of long-term OCS use in the Australian asthmatic population and determine the prevalence of OCS-related comorbidity development.

Data analysis plan

Demographic features and management practices will be descriptively assessed. Statistical modelling will be conducted for OCS use and associated morbidities. The odds ratio computation will be made using logistic regression and a dependent variable of 1 when a specific comorbidity diagnostic detected in clinical notes, otherwise for each patient observation 0 was recorded. The independent variables will include the dummy variable 1 when the patient is considered as having severe asthma, 0 if the patient has mild or moderate asthma and other control variables such as age and gender. The unadjusted odds ratio will not include the control variable.