London Asthma Diagnostics Study

Exclusion Criteria

• •Age \<18 years
• •A chest infection or exacerbation requiring antibiotics or steroids within 4 weeks of testing
• •Contraindications to spirometry testing
• •Established or coded diagnosis of COPD
• •Pregnancy or lactating
• •Other medical condition that in the opinion of the investigator would preclude compliance with the study protocoll
• •Inability to understand English
• •Involvement in Clinical Trial of an Investigational Medicinal Product