Study type

Study topic

Disease /health condition
Other

Study topic, other

Disease/Epidemiology study

Study type

Non-interventional study

Scope of the study

Disease epidemiology

Data collection methods

Secondary use of data
Non-interventional study

Non-interventional study design

Cross-sectional
Study drug and medical condition

Medical condition to be studied

Asthma
Population studied

Short description of the study population

Clinician-diagnosed asthma patients (i.e. a diagnostic Read code for asthma compatible with UK Quality and Outcomes Framework) who have been receiving current asthma therapy (≥ 1 asthma prescription in the last 2 years)

Age groups

Children (2 to < 12 years)
Adolescents (12 to < 18 years)
Adults (18 to < 46 years)
Adults (46 to < 65 years)
Adults (65 to < 75 years)
Adults (75 to < 85 years)
Adults (85 years and over)

Special population of interest

Other

Special population of interest, other

Asthma patients

Estimated number of subjects

30000
Study design details

Main study objective

This study will characterise patients with asthma from UK primary care practices and evaluates their disease severity, control and treatment.

Data analysis plan

Pooled practice and patient data will be used to characterise patients in terms of control status (classified by the Global INitiative for Asthma GINA and Royal College of Physician three questions), risk status (according to severe exacerbation frequency, defined as the number of asthma related hospitalisations and courses of acute oral steroids in previous 12 months), treatment step (as classified by GINA), and smoking status (current, ex-smoker or non-smoker). Summary statistics will be produced for all variables: for those measured on the interval/ratio scale, n and % of non-missing data, mean (standard deviation) or median (inter-quartile range), for categorical variables, n (%) of non-missing data and n (%) per category.