Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment

E. Marchant; D. Ready; G. Wimbury; R. Smithson; A. Charlett; I. Oliver

doi:10.1093/pubmed/fdab079

Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment

E. Marchant^*, D. Ready, G. Wimbury, R. Smithson, A. Charlett, I. Oliver

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

42 Downloads (Pure)

Abstract

BACKGROUND: UK asymptomatic contacts of confirmed COVID-19 cases are not routinely tested for SARS-CoV-2. Testing contacts may improve case ascertainment and reduce onward transmission. This study investigated the acceptability of SARS-CoV-2 testing among contacts of confirmed cases as an integral part of the contact-tracing process.

METHODS: A cross-sectional descriptive survey of case contacts was conducted in the UK. All contacts who completed a telephone call with the NHS Test and Trace Agile Lighthouse team were eligible for inclusion and were offered a molecular test. Consenting participants were sent a self-swab kit.

RESULTS: Of the 1523 individuals contacted, 602 (39.5%) accepted the test offer. Of the 240 (39.9%) samples returned for testing, 16.3% tested polymerase chain reaction-positive for SARS-CoV-2.Most individuals who declined with a reason (638/905; 70.5%) reported they had already taken or booked a SARS-CoV-2 test, or were part of a testing programme. Matched laboratory records confirmed 73.1% of those who declined were tested by another route.

CONCLUSIONS: Most case contacts were tested, either through arranging a test by themselves or by accepting the study offer. Results demonstrate high acceptability, with substantial test positivity, indicating that there is public health benefit in offering tests to contacts as a routine part of the contact-tracing process.

Original language	English
Pages (from-to)	E446-E452
Journal	Journal of Public Health (United Kingdom)
Volume	43
Issue number	3
Early online date	30 Mar 2021
DOIs	https://doi.org/10.1093/pubmed/fdab079
Publication status	Published - Sept 2021

Bibliographical note

Funding Information: This work was funded by Public Health England.

Open Access: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/),
which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

Publisher Copyright: © The Author(s) 2021. Published by Oxford University Press on behalf of Faculty of Public Health.

Citation: E Marchant, D Ready, G Wimbury, R Smithson, A Charlett, I Oliver, Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment, Journal of Public Health, Volume 43, Issue 3, September 2021, Pages e446–e452,

DOI: https://doi.org/10.1093/pubmed/fdab079

Keywords

behaviour
communicable diseases
health protection

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1093/pubmed/fdab079Licence: CC BY

Marchant2021DeterminingTheAcceptabilityofTestingContactsOfConfirmedJPublicHealthFinal published version, 436 KBLicence: CC BY

Cite this

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title = "Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment",

abstract = "BACKGROUND: UK asymptomatic contacts of confirmed COVID-19 cases are not routinely tested for SARS-CoV-2. Testing contacts may improve case ascertainment and reduce onward transmission. This study investigated the acceptability of SARS-CoV-2 testing among contacts of confirmed cases as an integral part of the contact-tracing process. METHODS: A cross-sectional descriptive survey of case contacts was conducted in the UK. All contacts who completed a telephone call with the NHS Test and Trace Agile Lighthouse team were eligible for inclusion and were offered a molecular test. Consenting participants were sent a self-swab kit. RESULTS: Of the 1523 individuals contacted, 602 (39.5\%) accepted the test offer. Of the 240 (39.9\%) samples returned for testing, 16.3\% tested polymerase chain reaction-positive for SARS-CoV-2.Most individuals who declined with a reason (638/905; 70.5\%) reported they had already taken or booked a SARS-CoV-2 test, or were part of a testing programme. Matched laboratory records confirmed 73.1\% of those who declined were tested by another route. CONCLUSIONS: Most case contacts were tested, either through arranging a test by themselves or by accepting the study offer. Results demonstrate high acceptability, with substantial test positivity, indicating that there is public health benefit in offering tests to contacts as a routine part of the contact-tracing process.",

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author = "E. Marchant and D. Ready and G. Wimbury and R. Smithson and A. Charlett and I. Oliver",

note = "Funding Information: This work was funded by Public Health England. Open Access: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Publisher Copyright: {\textcopyright} The Author(s) 2021. Published by Oxford University Press on behalf of Faculty of Public Health. Citation: E Marchant, D Ready, G Wimbury, R Smithson, A Charlett, I Oliver, Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment, Journal of Public Health, Volume 43, Issue 3, September 2021, Pages e446–e452, DOI: https://doi.org/10.1093/pubmed/fdab079",

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AU - Oliver, I.

N1 - Funding Information: This work was funded by Public Health England. Open Access: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. Publisher Copyright: © The Author(s) 2021. Published by Oxford University Press on behalf of Faculty of Public Health. Citation: E Marchant, D Ready, G Wimbury, R Smithson, A Charlett, I Oliver, Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment, Journal of Public Health, Volume 43, Issue 3, September 2021, Pages e446–e452, DOI: https://doi.org/10.1093/pubmed/fdab079

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N2 - BACKGROUND: UK asymptomatic contacts of confirmed COVID-19 cases are not routinely tested for SARS-CoV-2. Testing contacts may improve case ascertainment and reduce onward transmission. This study investigated the acceptability of SARS-CoV-2 testing among contacts of confirmed cases as an integral part of the contact-tracing process. METHODS: A cross-sectional descriptive survey of case contacts was conducted in the UK. All contacts who completed a telephone call with the NHS Test and Trace Agile Lighthouse team were eligible for inclusion and were offered a molecular test. Consenting participants were sent a self-swab kit. RESULTS: Of the 1523 individuals contacted, 602 (39.5%) accepted the test offer. Of the 240 (39.9%) samples returned for testing, 16.3% tested polymerase chain reaction-positive for SARS-CoV-2.Most individuals who declined with a reason (638/905; 70.5%) reported they had already taken or booked a SARS-CoV-2 test, or were part of a testing programme. Matched laboratory records confirmed 73.1% of those who declined were tested by another route. CONCLUSIONS: Most case contacts were tested, either through arranging a test by themselves or by accepting the study offer. Results demonstrate high acceptability, with substantial test positivity, indicating that there is public health benefit in offering tests to contacts as a routine part of the contact-tracing process.

AB - BACKGROUND: UK asymptomatic contacts of confirmed COVID-19 cases are not routinely tested for SARS-CoV-2. Testing contacts may improve case ascertainment and reduce onward transmission. This study investigated the acceptability of SARS-CoV-2 testing among contacts of confirmed cases as an integral part of the contact-tracing process. METHODS: A cross-sectional descriptive survey of case contacts was conducted in the UK. All contacts who completed a telephone call with the NHS Test and Trace Agile Lighthouse team were eligible for inclusion and were offered a molecular test. Consenting participants were sent a self-swab kit. RESULTS: Of the 1523 individuals contacted, 602 (39.5%) accepted the test offer. Of the 240 (39.9%) samples returned for testing, 16.3% tested polymerase chain reaction-positive for SARS-CoV-2.Most individuals who declined with a reason (638/905; 70.5%) reported they had already taken or booked a SARS-CoV-2 test, or were part of a testing programme. Matched laboratory records confirmed 73.1% of those who declined were tested by another route. CONCLUSIONS: Most case contacts were tested, either through arranging a test by themselves or by accepting the study offer. Results demonstrate high acceptability, with substantial test positivity, indicating that there is public health benefit in offering tests to contacts as a routine part of the contact-tracing process.

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Determining the acceptability of testing contacts of confirmed COVID-19 cases to improve secondary case ascertainment

Abstract

Bibliographical note

Keywords

UN SDGs

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