Video-based direct observation physiotherapy can be used to remotely assess children with CF undertaking physiotherapy, improving adherence and technique, and is potentially a cost-efficient and feasible approach for monitoring airway clearance therapy https://bit.ly/3Kf8rUF

This clinical trial was prospectively registered at the Clinical Trial Registry of India with identifier CTRI/2021/09/036796.

Ethics statement: Institutional ethics committee number IECPG-361/23.06.21.

Author contributions: S. Agarwal and K.R. Jat conceptualised the study and designed the protocol. S. Agarwal was involved in data collection, analysis and literature search, and prepared the initial draft of the manuscript. K.R. Jat, S. Gupta, J. Sankar, R. Lodha and S.K. Kabra critically revised the manuscript. All authors approved the final manuscript.

Conflicts of interest: The authors have no potential conflicts of interest to disclose.

The individual patient data, the study protocol and statistical analysis plan can be made available on request to the researchers with a methodologically sound proposal.