Severity of Severe Acute Respiratory System Coronavirus 2 (SARS-CoV-2) Alpha Variant (B.1.1.7) in England

被引：66

作者：

Grint, Daniel J. ^{[1
]}

Wing, Kevin ^{[1
]}

Houlihan, Catherine ^{[2
]}

Gibbs, Hamish P. ^{[1
]}

Evans, Stephen J. W. ^{[1
]}

Williamson, Elizabeth ^{[1
]}

McDonald, Helen, I ^{[1
]}

Bhaskaran, Krishnan ^{[1
]}

Evans, David ^{[3
]}

Walker, Alex J. ^{[3
]}

Hickman, George ^{[3
]}

Nightingale, Emily ^{[4
]}

Schultze, Anna ^{[1
]}

Rentsch, Christopher T. ^{[1
]}

Bates, Chris ^{[5
]}

Cockburn, Jonathan ^{[5
]}

Curtis, Helen J. ^{[3
]}

Morton, Caroline E. ^{[3
]}

Bacon, Sebastian ^{[3
]}

Davy, Simon ^{[3
]}

Wong, Angel Y. S. ^{[1
]}

Mehrkar, Amir ^{[3
]}

Tomlinson, Laurie ^{[1
]}

Douglas, Ian J. ^{[1
]}

Mathur, Rohini ^{[1
]}

MacKenna, Brian ^{[3
]}

Ingelsby, Peter ^{[3
]}

Croker, Richard ^{[3
]}

Parry, John ^{[5
]}

Hester, Frank ^{[5
]}

Harper, Sam ^{[5
]}

DeVito, Nicholas J. ^{[3
]}

Hulme, Will ^{[3
]}

Tazare, John ^{[1
]}

Smeeth, Liam ^{[1
]}

Goldacre, Ben ^{[3
]}

Eggo, Rosalind M. ^{[1
]}

机构：

[1] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, London, England

[2] UCL, Div Infect & Immun, London, England

[3] Univ Oxford, Nuffield Dept Primary Care Hlth Sci, DataLab, Oxford, England

[4] London Sch Hyg & Trop Med, Fac Publ Hlth & Policy, London, England

[5] TPP, Leeds, W Yorkshire, England

来源：

CLINICAL INFECTIOUS DISEASES | 2022年 / 75卷 / 01期

基金：

英国医学研究理事会; 英国科研创新办公室;

关键词：

SARS-CoV-2; alpha; case fatality; hospital admission;

D O I：

10.1093/cid/ciab754

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) alpha variant (B.1.1.7) is associated with higher transmissibility than wild-type virus, becoming the dominant variant in England by January 2021. We aimed to describe the severity of the alpha variant in terms of the pathway of disease from testing positive to hospital admission and death. Methods With the approval of NHS England, we linked individual-level data from primary care with SARS-CoV-2 community testing, hospital admission, and Office for National Statistics all-cause death data. We used testing data with S-gene target failure as a proxy for distinguishing alpha and wild-type cases, and stratified Cox proportional hazards regression to compare the relative severity of alpha cases with wild-type diagnosed from 16 November 2020 to 11 January 2021. Results Using data from 185 234 people who tested positive for SARS-CoV-2 in the community (alpha = 93 153; wild-type = 92 081), in fully adjusted analysis accounting for individual-level demographics and comorbidities as well as regional variation in infection incidence, we found alpha associated with 73% higher hazards of all-cause death (adjusted hazard ratio [aHR]: 1.73; 95% confidence interval [CI]: 1.41-2.13; P < .0001) and 62% higher hazards of hospital admission (1.62; 1.48-1.78; P < .0001) compared with wild-type virus. Among patients already admitted to the intensive care unit, the association between alpha and increased all-cause mortality was smaller and the CI included the null (aHR: 1.20; 95% CI: .74-1.95; P = .45). Conclusions The SARS-CoV-2 alpha variant is associated with an increased risk of both hospitalization and mortality than wild-type virus. The SARS-CoV-2 alpha variant is associated with a 62% increased risk of hospitalization and a 73% increased risk of death, compared with the originally circulating wild-type virus in England between 16 November 2020 and 21 April 2021.

引用

页码：E1120 / E1127

页数：8

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