1. World Health Organisation . COVID-19 health system response monitor–United Kingdom. Available from: https://www.covid19healthsystem.org/countries/unitedkingdom/countrypage.aspx (accessed 14 April 2021).
Google Scholar2. Clark, A, Jit, M, Warren-Gash, C, et al. Global, regional, and national estimates of the population at increased risk of severe COVID-19 due to underlying health conditions in 2020: a modelling study. Lancet Glob Health 2020; 8(8): e1003–e1017.
Google Scholar | Crossref | Medline3. Department of Health & Social, Care. What the coronavirus bill will do 2020. Available from: https://www.gov.uk/government/publications/coronavirus-bill-what-it-will-do/what-the-coronavirus-bill-will-do (accessed 14 April 2021).
Google Scholar4. British Lung, Foundation. Lung disease in the UK. Available from: https://statistics.blf.org.uk/ (2012) (accessed 14 April 2021).
Google Scholar5. GBD 2019 Diseases and, Injuries Collaborators. Global burden of 369 diseases and injuries in 204 countries and territories, 1990-2019: a systematic analysis for the global burden of disease study 2019. Lancet 2020; 396(10258): 1204–1222.
Google Scholar | Crossref | Medline6. Perissinotto, C, Holt-Lunstad, J, Periyakoil, VS, et al. A practical approach to assessing and mitigating loneliness and isolation in older adults. J Am Geriatr Soc 2019; 67(4): 657–662.
Google Scholar | Crossref | Medline7. Sañudo, B, Fennell, C, Sánchez-Oliver, AJ. Objectively-assessed physical activity, sedentary behavior, smartphone use, and sleep patterns pre- and during-COVID-19 quarantine in young adults from Spain. Sustainability 2020; 12(15): 5890.
Google Scholar | Crossref8. Singh, C . Identifying clinically extremely vulnerable people and asking them to shield should not be taken lightly. BMJ 2020; 371: m4727.
Google Scholar | Crossref | Medline9. Medina-Mirapeix, F, Bernabeu-Mora, R, García-Guillamón, G, et al. Patterns, trajectories, and predictors of functional decline after hospitalization for acute exacerbations in men with moderate to severe chronic obstructive pulmonary disease: a longitudinal study. PLoS One 2016; 11(6): e0157377.
Google Scholar | Crossref | Medline10. Spruit, M, Holland, AE, Singh, SJ, et al. COVID-19: Interim guidance on rehabilitation in the hospital and post-hospital phase from a European respiratory society and American thoracic society-coordinated international task force. Eur Respir J 2020; 56(6): 2002197.
Google Scholar | Crossref11. World Health Organisation . Rapid assessment of service delivery for noncommunicable diseases (NCDs) during the COVID-19 pandemic 2020. Available from: https://www.who.int/publications/m/item/rapid-assessment-of-service-delivery-for-ncds-during-the-covid-19-pandemic (accessed 14 April 2021).
Google Scholar12. González, J, Moncusí-Moix, A, Benitez, ID, et al. Clinical consequences of COVID-19 lockdown in patients with COPD: results of a pre-post study in Spain. Chest 2021; 160(1):135–138.
Google Scholar | Crossref | Medline13. Philip, KEJ, Lonergan, B, Cumella, A, et al. COVID-19 related concerns of people with long-term respiratory conditions: a qualitative study. BMC Pulm Med 2020; 20(1): 319.
Google Scholar | Crossref | Medline14. World Health Organization . International classification of functioning, disability and health. Geneva, Switzerland: World Health Organization, 2001.
Google Scholar15. Edemekong, PF, Bomgaars, DL, Sukumaran, S, et al. Activities of daily living. In: StatPearls [Internet]. Treasure Island, FL: StatPearls Publishing, 2021. Available from: https://www.ncbi.nlm.nih.gov/books/NBK470404/ (accessed 14 April 2021).
Google Scholar16. Han, SJ, Kim, HK, Storfjell, J, et al. Clinical outcomes and quality of life of home health care patients. Asian Nurs Res 2013; 7(2): 53–60.
Google Scholar | Crossref | Medline17. von Elm, E, Altman, DG, Egger, M, et al. The strengthening the reporting of observational studies in epidemiology (STROBE) statement: guidelines for reporting observational studies. Int J Surg 2014; 12(12): 1495–1499.
Google Scholar | Crossref | Medline | ISI18. Global Intiative for Chronic Lung Disease . Pocket guide to COPD diagnosis, management and prevention: a guide for health professionals. Global Initiative for Chronic Obstructive Lung Disease (GOLD), 2018, https://goldcopd.org/wp-content/uploads/2018/11/GOLD-2019-POCKET-GUIDE-DRAFT-v1.7-14Nov2018-WMS.pdf (accessed 14 April 2021).
Google Scholar19. Bradley, B, Branley, HM, Egan, JJ, et al. Interstitial lung disease guideline: the British thoracic society in collaboration with the thoracic society of Australia and New Zealand and the Irish thoracic society. Thorax 2008; 63(Suppl 5): v1–58.
Google Scholar | Medline20. Austin, SR, Wong, YN, Uzzo, RG, et al. Why summary comorbidity measures such as the Charlson comorbidity index and elixhauser score work. Med Care 2015; 53(9): e65–e72.
Google Scholar | Crossref | Medline | ISI21. Abernethy, AP, Shelby-James, T, Fazekas, BS, et al. The Australia-modified Karnofsky performance status (AKPS) scale: a revised scale for contemporary palliative care clinical practice [ISRCTN81117481]. BMC Palliat Care 2005; 4: 7.
Google Scholar | Crossref | Medline22. Murtagh, FE, Ramsenthaler, C, Firth, A, et al. A brief, patient- and proxy-reported outcome measure in advanced illness: validity, reliability and responsiveness of the integrated palliative care outcome scale (IPOS). Palliat Med 2019; 33(8): 1045–1057.
Google Scholar | SAGE Journals | ISI23. Joshi, A, Kale, S, Chandel, S, et al. Likert scale: explored and explained. Br J Appl Sci Technol 2015; 7(4): 396–403.
Google Scholar | Crossref24. Kamper, S . Global rating of change scales. Aust J Physiother 2009; 55(4): 289.
Google Scholar | Crossref | Medline25. Collin, C, Wade, DT, Davies, S, et al. The barthel ADL index: a reliability study. Int Disabil Stud 1988; 10(2): 61–63.
Google Scholar | Crossref | Medline26. Bouwstra, H, Smit, EB, Wattel, EM, et al. Measurement properties of the barthel index in geriatric rehabilitation. J Am Med Directors Assoc 2019; 20(4): 420–425.
Google Scholar | Crossref | Medline27. Lawton, MP, Brody, EM. Assessment of older people: self-maintaining and instrumental activities of daily living. Gerontologist 1969; 9(3): 179–186.
Google Scholar | Crossref | Medline | ISI28. Suijker, JJ, van Rijn, M, Ter Riet, G, et al. Minimal important change and minimal detectable change in activities of daily living in community-living older people. J Nutr Health Aging 2017; 21(2): 165–172.
Google Scholar | Crossref | Medline29. World Health Organization . Measuring health and disability manual for WHO disability assessment schedule 2.0 (WHODAS 2.0). WHO Library Cataloguing-in-Publication Data, 2010, http://apps.who.int/iris/bitstream/handle/10665/43974/9789241547598_eng.pdf;jsessionid=39A20A6E1DC30E33139A3B041F41B262?sequence=1 (accessed 14 April 2021).
Google Scholar30. Federici, S, Bracalenti, M, Meloni, F, et al. World health organization disability assessment schedule 2.0: an international systematic review. Disabil Rehabil 2017; 39(23): 2347–2380.
Google Scholar | Crossref | Medline31. Neo, J, Fettes, L, Gao, W, et al. Disability in activities of daily living among adults with cancer: a systematic review and meta-analysis. Cancer Treat Rev 2017; 61: 94–106.
Google Scholar | Crossref | Medline32. Chronic Respiratory Disease Collaborators . Global, regional, and national deaths, prevalence, disability-adjusted life years, and years lived with disability for chronic obstructive pulmonary disease and asthma, 1990-2015: a systematic analysis for the global burden of disease study 2015. Lancet Respir Med 2017; 5(9): 691–706.
Google Scholar | Crossref | Medline33. Kohn, MA, Senyak, J. Sample size calculators for designing clinical research: UCSF CTSI. Available from: https://sample-size.net/correlation-sample-size/ (2021) (accessed 14 April 2021).
Google Scholar34. Fettes, L, Neo, J, Ashford, S, et al. Trajectories of disability in activities of daily living in advanced cancer or respiratory disease: a systematic review. Disabil Rehabil 2020: 1–12.
Google Scholar | Crossref | Medline35. Hume, E, Armstrong, M, Manifield, J, et al. Impact of COVID-19 shielding on physical activity and quality of life in patients with COPD. Breathe 2020; 16(3): 200231.
Google Scholar | Crossref | Medline36. Boutou, AK, Raste, Y, Demeyer, H, et al. Progression of physical inactivity in COPD patients: the effect of time and climate conditions–a multicenter prospective cohort study. Int J Chronic Obstructive Pulm Dis 2019; 14: 1979–1992.
Google Scholar | Crossref | Medline37. Mikkelsen, MK, Nielsen, DL, Vinther, A, et al. Attitudes towards physical activity and exercise in older patients with advanced cancer during oncological treatment–a qualitative interview study. Eur J Oncol Nurs 2019; 41: 16–23.
Google Scholar | Crossref | Medline38. Chaudhry, SI, Murphy, TE, Gahbauer, E, et al. Restricting symptoms in the last year of life. JAMA Intern Med 2013; 173: 1534–1540.
Google Scholar | Crossref | Medline39. Joshi, M, Joshi, A, Bartter, T. Symptom burden in chronic obstructive pulmonary disease and cancer. Curr Opin Pulm Med 2012; 18(2): 97–103.
Google Scholar | Crossref | Medline | ISI40. Fong, JH, Mitchell, OS, Koh, BSK. Disaggregating activities of daily living limitations for predicting nursing home admission. Health Serv Res 2015; 50(2): 560–578.
Google Scholar | Crossref | Medline41. Lewis, A, Knight, E, Bland, M, et al. Feasibility of an online platform delivery of pulmonary rehabilitation for individuals with chronic respiratory disease. BMJ Open Respir Res 2021; 8(1): e000880.
Google Scholar | Crossref | Medline42. Lopez, CJ, Edwards, B, Langelier, DM, et al. Delivering virtual cancer rehabilitation programming during the first 90 days of the COVID-19 pandemic: a multimethod study. Arch Phys Med Rehabil 2021; 102(7):1283–1293.
Google Scholar | Crossref | Medline43. Polgar, O, Aljishi, M, Barker, RE, et al. Digital habits of PR service-users: implications for home-based interventions during the COVID-19 pandemic. Chronic Respir Dis 2020; 17: 1479973120936685.
Google Scholar | SAGE Journals | ISI44. Philip, K, Cumella, A, Farrington-Douglas, J, et al. Respiratory patient experience of measures to reduce risk of COVID-19: findings from a descriptive cross-sectional UK wide survey. BMJ Open 2020; 10(9): e040951.
Google Scholar | Crossref | Medline45. Lenferink, A, van der Palen, J, Effing, T. The role of social support in improving chronic obstructive pulmonary disease self-management. Expert Rev Respir Med 2018; 12(8): 623–626.
Google Scholar | Crossref | Medline46. McLaughlin, D, Leung, J, Pachana, N, et al. Social support and subsequent disability: it is not the size of your network that counts. Age and Ageing 2012; 41(5): 674–677.
Google Scholar | Crossref | Medline47. Arabyat, RM, Raisch, DW. Relationships between social/emotional support and quality of life, depression and disability in patients with chronic obstructive pulmonary disease: an analysis based on propensity score matching. Ann Behav Med 2019; 53(10): 918–927.
Google Scholar | Crossref | Medline48. Münch, U, Müller, H, Deffner, T, et al. Empfehlungen zur Unterstützung von belasteten, schwerstkranken, sterbenden und trauernden Menschen in der Corona-Pandemie aus palliativmedizinischer perspektive. Der Schmerz 2020; 34(4): 303–313.
Google Scholar | Crossref | Medline49. Lage, DE, El-Jawahri, A, Fuh, CX, et al. Functional impairment, symptom burden, and clinical outcomes among hospitalized patients with advanced cancer. J Natl Compr Cancer Netw 2020; 18(6): 747–754.
Google Scholar | Crossref | Medline50. De Biase, S, Cook, L, Skelton, DA, et al. The COVID-19 rehabilitation pandemic1. Age and Ageing 2020; 49(5): 696–700.
Google Scholar | Crossref | Medline