Evidence map›Paper›PMID 33357518›Full record

ArticleThe Lancet. Infectious diseases2021

Association of tiered restrictions and a second lockdown with COVID-19 deaths and hospital admissions in England: a modelling study.

Nicholas G Davies, Rosanna C Barnard, Christopher I Jarvis, Timothy W Russell, Malcolm G Semple, Mark Jit, W John Edmunds, Centre for Mathematical Modelling of Infectious Diseases COVID-19 Working Group, ISARIC4C investigators

Open access · hybridAbstract read
In one paragraph

Article in The Lancet. Infectious diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
83citing papers in PubMed, 4 pooled it
29.9field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

83 citing papers in PubMed, 4 syntheses or guidelines pooled it, 164 citations in OpenAlex.

  1. Pooled it
  2. Incorporating Social Determinants of Health in Infectious Disease Models: A Systematic Review of Guidelines.Medical decision making : an international journal of the Society for Medical Decision Making · 2024
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23 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 1 country.

Nicholas G DaviesDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK. Electronic address: nicholas.davies@lshtm.ac.uk.
Rosanna C BarnardDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
Christopher I JarvisDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
Timothy W RussellDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
Malcolm G SempleNational Institute for Health Research Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK; Department of Respiratory Medicine, Alder Hey Children's Hospital, Liverpool, UK.
Mark JitDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
W John EdmundsDepartment of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
Centre for Mathematical Modelling of Infectious Diseases COVID-19 Working Group
ISARIC4C investigators
London School of Hygiene & Tropical Medicine · GBAlder Hey Children's Hospital · GB

Funding

Medical Research Council MC_PC_17228Medical Research Council MC_PC_19025Medical Research Council MC_PC_19059Medical Research Council MC_PC_19065Medical Research Council MC_QA137853Medical Research Council MR/S032304/1Wellcome Trust
6 · The paper itself

Abstract

backgroundA second wave of COVID-19 cases in autumn, 2020, in England led to localised, tiered restrictions (so-called alert levels) and, subsequently, a second national lockdown. We examined the impact of these tiered restrictions, and alternatives for lockdown stringency, timing, and duration, on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission and hospital admissions and deaths from COVID-19.

methodsWe fit an age-structured mathematical model of SARS-CoV-2 transmission to data on hospital admissions and hospital bed occupancy (ISARIC4C/COVID-19 Clinical Information Network, National Health Service [NHS] England), seroprevalence (Office for National Statistics, UK Biobank, REACT-2 study), virology (REACT-1 study), and deaths (Public Health England) across the seven NHS England regions from March 1, to Oct 13, 2020. We analysed mobility (Google Community Mobility) and social contact (CoMix study) data to estimate the effect of tiered restrictions implemented in England, and of lockdowns implemented in Northern Ireland and Wales, in October, 2020, and projected epidemiological scenarios for England up to March 31, 2021.

findingsWe estimated a reduction in the effective reproduction number (R

interpretationLockdown measures outperform less stringent restrictions in reducing cumulative deaths. We projected that the lockdown policy announced to commence in England on Nov 5, with a similar stringency to the lockdown adopted in Wales, would reduce pressure on the health service and would be well timed to suppress deaths over the winter period, while allowing schools to remain open. Following completion of the analysis, we analysed new data from November, 2020, and found that despite similarities in policy, the second lockdown in England had a smaller impact on behaviour than did the second lockdown in Wales, resulting in more deaths and hospitalisations than we originally projected when focusing on a Wales-stringency scenario for the lockdown.

fundingHorizon 2020, UK Medical Research Council, and the National Institute for Health Research.

Indexed as

Communicable Disease ControlModels, StatisticalBasic Reproduction NumberCOVID-19EnglandEpidemicsForecastingHospital Bed CapacityHospitalizationHospitalsHumansIntensive Care UnitsNorthern IrelandSARS-CoV-2Seroepidemiologic StudiesState Medicine

Identifiers

PMID33357518
PMCPMC7758181
OpenAlexW3114268739

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.