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UKCRC Health Research Classification System


Main inclusion criteria

Asthma, chronic obstructive pulmonary disease (COPD), respiratory diseases and normal development and function of the respiratory system.

Advice on health categories

Includes studies of the upper and lower respiratory tract, including nasal cavity, sinuses, larynx, vocal cords, trachea and lungs. Studies of the elements of the throat shared with the digestive system (e.g. pharynx and epiglottis) may be coded as Oral and Gastrointestinal depending on the context of the research.

Studies of allergies in asthma sufferers can be coded as 50% Inflammatory and Immune System for allergies and 50% Respiratory for asthma.

Excludes pulmonary hypertension which should be coded as Cardiovascular.

Excludes respiratory infections which should be coded as Infection.

Note there is specific guidance for coding research related to smoking, tobacco and smoking-related diseases.

Official terminology

Full name of category

Short Name Unique ID
Respiratory Respiratory



Related external links

International Classification of Diseases (ICD 10 v2016) – Chapter X:   Diseases of the respiratory system (J00-J99)