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. 2021 Sep:8:100186.
doi: 10.1016/j.lanepe.2021.100186. Epub 2021 Aug 6.

Long Covid in adults discharged from UK hospitals after Covid-19: A prospective, multicentre cohort study using the ISARIC WHO Clinical Characterisation Protocol

Affiliations

Long Covid in adults discharged from UK hospitals after Covid-19: A prospective, multicentre cohort study using the ISARIC WHO Clinical Characterisation Protocol

Louise Sigfrid et al. Lancet Reg Health Eur. 2021 Sep.

Abstract

Background: This study sought to establish the long-term effects of Covid-19 following hospitalisation.

Methods: 327 hospitalised participants, with SARS-CoV-2 infection were recruited into a prospective multicentre cohort study at least 3 months post-discharge. The primary outcome was self-reported recovery at least ninety days after initial Covid-19 symptom onset. Secondary outcomes included new symptoms, disability (Washington group short scale), breathlessness (MRC Dyspnoea scale) and quality of life (EQ5D-5L).

Findings: 55% of participants reported not feeling fully recovered. 93% reported persistent symptoms, with fatigue the most common (83%), followed by breathlessness (54%). 47% reported an increase in MRC dyspnoea scale of at least one grade. New or worse disability was reported by 24% of participants. The EQ5D-5L summary index was significantly worse following acute illness (median difference 0.1 points on a scale of 0 to 1, IQR: -0.2 to 0.0). Females under the age of 50 years were five times less likely to report feeling recovered (adjusted OR 5.09, 95% CI 1.64 to 15.74), were more likely to have greater disability (adjusted OR 4.22, 95% CI 1.12 to 15.94), twice as likely to report worse fatigue (adjusted OR 2.06, 95% CI 0.81 to 3.31) and seven times more likely to become more breathless (adjusted OR 7.15, 95% CI 2.24 to 22.83) than men of the same age.

Interpretation: Survivors of Covid-19 experienced long-term symptoms, new disability, increased breathlessness, and reduced quality of life. These findings were present in young, previously healthy working age adults, and were most common in younger females.

Funding: National Institute for Health Research, UK Medical Research Council, Wellcome Trust, Department for International Development and the Bill and Melinda Gates Foundation.

Keywords: Covid-19; long-Covid; long-term outcomes; post-Covid; post-acute Covid-19; quality of life; sequelae.

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Conflict of interest statement

CRD declares funding from the Medical Research Council, UK. JM reports a University of Cambridge Research Fellowship. WSL reports unrestricted investigator-initiated research funding from Pfizer for an unrelated multi-centre study in pneumonia, in which WSL is the CI and UK NIHR research funding for unrelated clinical trials in the fields of COVID-19, tuberculosis and community-acquired pneumonia. WSL's role on the Joint Committee on Vaccination and Immunisation (JCVI), UK and chair of COVID-19 Immunisation and as National Lead on British Thoracic Society community acquired pneumonia audit programme is unpaid and unrelated to this work. CB declares a British Heart Foundation Centre award, and a project grants from the Chief Scientist Office, Scottish Government CSO Long Term Effects and from Heart Research UK unrelated to this work. LG declares support from Pfizer & Gilead for attendance at an educational meeting in Nov 2018 and April 2019, for cost of conference registration fee, accommodation and flights unrelated to this work. PJMO reports personal fees from consultancy, grants from MRC, EU, NIHR Biomedical Research Centres, MRC/GSK, Wellcome Trust, NIHR (HPRU) and NIHR Senior Investigator Award. Personal fees from European Respiratory Society, grants from MRC Global Challenge Research fund, other from Nestle Discussion Forum (unpaid), Pfizer antivirals advisory board (unpaid) outside of the submitted work and the role of President of the British Society for Immunology was an unpaid appointment but PJMO's travel and accommodation at some meetings is provided by the Society. MGS reports grants from the National Institute for Health Research (NIHR), Medical Research Council. NIHR Health Protection Research Unit (HPRU) in Emerging and Zoonotic Infections at University of Liverpool in partnership with Public Health England (PHE), in collaboration with Liverpool School of Tropical Medicine and the University of Oxford. All other authors have no interests to declare.

Figures

Fig 1
Fig. 1
Patient inclusion flowchart
Fig 2
Fig. 2
Proportion of new or persistent symptoms occurring (Fig. 2A) and their co-occurrence with each other (Fig. 2B). For Figure 2A, fatigue is coloured in green as this outcome was derived from the fatigue visual analogue outcome, where a fatigue rating of 2 or greater was considered as the presence of the fatigue symptom (see Supplementary Table 7 for raw values). Erectile dysfunction affected 23·4% (45/192) of males included, not shown as Figure 2A presents data for any sex. For Figure 2B, the Jaccard similarity index was calculated and presented as intensity of red colour, with 0 (white) being no co-occurrence and 1 (bright red) being always co-occurring.
Fig 3
Fig. 3
Outcomes stratified by age and presence of one or more comorbidities. Figure 3A – Proportion of participants not feeling fully recovered; Figure 3B – Proportion of participants with new or persistent symptoms; Figure 3C - Proportion of participants with increased breathlessness as measured by MRC dyspnoea scale; Figure 3D – Participant rated fatigue on 0 to 10 VAS; Figure 3E – Change in overall EQ5D-5L summary health index; Figure 3F – presence of new or worse disability in at least one Washington Group disability domain. Point estimates presented alongside 95% confidence intervals. MRC – Medical Research Council, VAS – Visual Analogue Scale.
Fig 4
Fig. 4
MRC Dyspnoea scale prior to Covid-19 onset and at the time of follow-up. Figure 4A – MRC dyspnoea scale reported prior to onset of Covid-19 symptoms; Figure 4B – MRC dyspnoea scale at the time of follow-up; Figure 4C – Alluvial plot of proportion of the changes in proportion of males and females in each MRC scale grade before symptom onset and at time of follow-up, stratified in each sex group by admission to critical care. In Figure 4C, for females, there are greater numbers of participants who begin at MRC 1 and transition to higher levels on the scale compared with males. MRC – Medical Research Council
Fig 5
Fig. 5
Multilevel model for primary outcome of self-reported recovery (reference level is feeling fully recovered)

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