What is the relationship between validated frailty scores and mortality for adults with COVID-19 in acute hospital care? A systematic review

• Published in: Age and ageing 2021-05, Vol.50 (3), p.608-616
• Main Authors: Cosco, Theodore D, Best, John, Davis, Daniel, Bryden, Daniele, Arkill, Suzanne, van Oppen, James, Riadi, Indira, Wagner, Kevin R, Conroy, Simon
• Format: Article
• Language: English
• Subjects: Clinical assessment; COVID-19; Death & dying; Extraction; Frailty; Medical prognosis; Medical screening; Meta-analysis; Mortality; Older people; Statistical analysis; Systematic review
• ISSN: 0002-0729; 1468-2834; 1468-2834
• DOI: 10.1093/ageing/afab008

Abstract Background and Aim The aim of this systematic review was to quantify the association between frailty and COVID-19 in relation to mortality in hospitalised patients. Methods Medline, Embase, Web of Science and the grey literature were searched for papers from inception to 10 September 2020; the search was re-run in Medline up until the 9 December 2020. Screening, data extraction and quality grading were undertaken by two reviewers. Results were summarised using descriptive statistics, including a meta-analysis of overall mortality; the relationships between frailty and COVID-19 mortality were summarised narratively. Results A total of 2,286 papers were screened resulting in 26 being included in the review. Most studies were from Europe, half from the UK, and one from Brazil; the median sample size was 242.5, median age 73.1 and 43.5% were female. In total, 22/26 used the Clinical Frailty Scale; reported mortality ranged from 14 to 65%. Most, but not all studies showed an association between increasing frailty and a greater risk of dying. Two studies indicated a sub-additive relationship between frailty, COVID-19 and death, and two studies showed no association. Conclusions Whilst the majority of studies have shown a positive association between COVID-19-related death and increasing frailty, some studies suggested a more nuanced understanding of frailty and outcomes in COVID-19 is needed. Clinicians should exert caution in placing too much emphasis on the influence of frailty alone when discussing likely prognosis in older people with COVID-19 illness.