Multicentre Prospective Cohort Study of Remote Lung Function Testing in Children: validation and comparison of supervised and unsupervised spirometry

Inclusion Criteria:

• Male and female children aged 5 to 16 years old
• Doctor diagnosed respiratory condition, including asthma, cystic fibrosis, PCD, bronchiectasis
• Child able to perform reliable spirometry
• Family have access to a smartphone or tablet and a second device for video consultation

Exclusion Criteria:

• Significant learning difficulties
• Other reasons for being unable to do lung function tests, for example, unable to make a seal around the mouthpiece
• Informed consent/assent has not been provided
• No English speaking member of the family
• Contraindications as outlined by the ARTP, e.g. pneumothorax, haemoptysis of unknown origin, unstable cardiovascular status, recent eye surgery, vomiting or any acute disease that would interfere with the test performance, recent surgery (thoracic/abdominal)

Participants will be recruited at the four participating centres: Sheffield Children's Hospital, Leeds Children's Hospital, Royal Hospital for Children (Glasgow) and Great Ormond Street Hospital (London).