Use of automatic 6-minute walking test recording system in patients with chronic respiratory diseases

To the editor: Physical capacity tests are used for the diagnosis, prognosis and monitoring of chronic respiratory diseases (CRD), such as Chronic Obstructive Pulmonary Disease (COPD) or Pulmonary Hypertension (PH).1 Among these tests, the most widely used is the 6-minute walking test (6MWT).2 Additionally, the guidelines highlight the need to continuously record biological signals, particularly oxygen saturation (SpO2), which has been shown to be a prognostic marker in CRD.2 [...]The study was supported by grants from Societat Catalana de Pneumologia (SOCAP) (ESTEVE TEIJIN/2021), PI17/1515 and PI21/0555 from the Instituto de Salud Carlos III (ISCiii), co-funded by the European Union (ERDF/ESF, ”A way to make Europe” “Investing in your future”) and Premi d’Innovació de l’Hospital Clínic de Barcelona (2021). For UPC authors this work has been supported by the Spanish Ministry of Science and Innovation under contract PID2021-124463OB-I00, the Catalan Government under contract 2021 SGR 00326 and the Catalan Department of Research and Universities.Peer ReviewedPostprint (published version