NCT05639205

Brief Summary

The goal of this interventional study is to investigate whether continued use of regular asymptomatic testing in staff is a feasible, effective and cost-effective strategy to reduce the impact of COVID-19 in care homes. The trial aims to quantify the benefits and harms of regular asymptomatic testing in care home staff to inform policy. The rationale for regular asymptomatic testing is that it may reduce the risk of severe disease in residents and the frequency/severity of outbreaks. Participants (care home staff) will perform regular asymptomatic tests for Covid-19. Should they test positive they will be required to refrain from working and be provided with sick pay. Care providers will be reimbursed for the costs of employing agency staff to cover staff sickness absence that results directly from the trial.

Trial Health

35
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
280

participants targeted

Target at P25-P50 for phase_3 covid19

Timeline
Completed

Started Dec 2022

Typical duration for phase_3 covid19

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Start

First participant enrolled

December 1, 2022

Completed
1 day until next milestone

First Submitted

Initial submission to the registry

December 2, 2022

Completed
4 days until next milestone

First Posted

Study publicly available on registry

December 6, 2022

Completed
1.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2024

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 1, 2024

Completed
Last Updated

December 9, 2022

Status Verified

December 1, 2022

Enrollment Period

1.3 years

First QC Date

December 2, 2022

Last Update Submit

December 6, 2022

Conditions

Keywords

Lateral Flow Device

Outcome Measures

Primary Outcomes (1)

  • Primary Outcome

    The primary outcome is the incidence of COVID-19 related hospital admissions in residents, defined as admissions with a relevant ICD-10 codes (COVID hospitalisations to be defined as any hospital admission record with a primary or secondary ICD10 code of 'U071') and/or admissions in residents who test positive for COVID-19 within 24h following admission or in the 7 days before hospital admission. This has been selected because it is the most important outcome for policymakers.

    4 months

Secondary Outcomes (11)

  • Incidence rate of hospital admissions

    4 months

  • Incidence rate of COVID-associated mortality in residents

    4 months

  • Incidence of all-cause mortality in residents

    4 months

  • Testing uptake in staff

    Once per week for 4 months

  • Prevalence of SARS-CoV-2 among staff who test

    Once per week for 4 months

  • +6 more secondary outcomes

Study Arms (2)

Arm A

ACTIVE COMPARATOR

LFD testing for Covid-19 with sickness support payment. Care providers will receive funding to reimburse the costs of employing agency staff to cover sickness absence in asymptomatic staff who test positive for COVID.

Diagnostic Test: Lateral Flow Device

Arm B

NO INTERVENTION

Usual Care

Interventions

Lateral Flow DeviceDIAGNOSTIC_TEST

Regular asymptomatic staff testing with a Lateral Flow Device including support payments if unwell.

Arm A

Eligibility Criteria

Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

  • Only care home staff are eligible to participate in the testing intervention. This includes temporary (agency) staff with no restrictions i.e. catering staff, administrative staff, maintenance staff, in addition to those in a resident-facing role.
  • All care home staff, residents, visitors and relatives are eligible to participate in interviews undertaken as part of the process evaluation.
  • All care home residents at participating home are eligible for data collection and analysis of the outcomes specified.

You may not qualify if:

  • Visitors, residents and relatives are not eligible to take part in the testing intervention.
  • Staff who visit the care home to provide care but are not employed by the care home e.g. GPs, health visitors are not eligible to take part in either the interviews or the testing intervention.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Related Publications (1)

  • Stirrup O, Blackstone J, Cullen-Stephenson I, Fenner R, Adams N, Leiser R, Krutikov M, Azmi B, Freemantle N, Gordon A, Regan M, Knapp M, Gosce L, Henderson C, Hopkins S, Verma A, Cassell J, Cadar D, Fowler T, Copas A, Flowers P, Shallcross L. VIVALDI-CT shaping care home COVID-19 testing policy: A pragmatic cluster randomised controlled trial of asymptomatic testing compared to standard care in care home staff. PLoS One. 2025 Jul 2;20(7):e0324908. doi: 10.1371/journal.pone.0324908. eCollection 2025.

MeSH Terms

Conditions

COVID-19

Condition Hierarchy (Ancestors)

Pneumonia, ViralPneumoniaRespiratory Tract InfectionsInfectionsVirus DiseasesCoronavirus InfectionsCoronaviridae InfectionsNidovirales InfectionsRNA Virus InfectionsLung DiseasesRespiratory Tract Diseases

Study Officials

  • Laura Shallcross, Professor

    UCL

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Laura Shallcross, Professor

CONTACT

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
NONE
Purpose
HEALTH SERVICES RESEARCH
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

December 2, 2022

First Posted

December 6, 2022

Study Start

December 1, 2022

Primary Completion

April 1, 2024

Study Completion

April 1, 2024

Last Updated

December 9, 2022

Record last verified: 2022-12