Contact tracing times for eligible positive cases and close contacts
These data havebeen published to provide a weekly summary of contact tracing for coronavirus in Wales. Figures show the percentage of positive cases and close contacts reached within 24 and 48 hours, and from the time positive cases were referred to the contact tracing system, the percentage of all close contacts that were eligible for follow-up reached within 24 and 48 hours. These figures are subject to small revisions from week to week due to cases being flagged as not eligible following further investigation by contact tracing teams.
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Metadata
- High level information
- Summary information
- Keywords
- Statistical quality information
- Weblinks
- Open Data
Title
Timeliness measures for contact tracing of eligible positive cases and close contactsLast update
7 July 2022Next update
-Publishing organisation
Welsh GovernmentSource 1
Digital Health and Care Wales (DHCW)Contact email
kas.covid19@gov.walesDesignation
Management informationLowest level of geographical disaggregation
WalesGeographical coverage
WalesLanguages covered
English and WelshData licensing
You may use and re-use this data free of charge in any format or medium, under the terms of the Open Government License - see http://www.nationalarchives.gov.uk/doc/open-government-licenceGeneral description
For positive cases, the time taken to reach someone is the time between the case being referred to the contact tracing system and the individual being successfully contacted. For close contacts there are two measures. The first is the time from someone being identified as a close contact to when they are successfully contacted. The second measure is the time taken from the index case being referred to the contact tracing system to the close contact being successfully contacted. The latter measure for close contacts excludes a small number that could not be linked back to the positive case that identified them.In these statistics, weeks are defined as Sundays to Saturdays.
The majority of cases not eligible for follow-up by local contact tracers occur in closed settings such as hospitals, care homes and prisons. Positive cases and close contacts residing outside Wales are also not eligible for follow-up and are referred to the relevant public health agency for onward tracing.
Data prior to 4 September 2021 are those measures as first published. Since the week ending the 11 September 2021 we have been able to provide a calculation of timeliness measures for each positive or close contact which does not alter over time, this day may revise due to positive cases and close contacts being flagged as not eligible following further investigation by contact tracing teams.
Data collection and calculation
The data in this release is management information collected as part of the contact tracing process. The data has not been collected for official statistics purposes, meaning it has not undergone the same level of quality assurance as official statistics and may be subject to future revisions.Frequency of publication
WeeklyData reference periods
September 2020 onwardsKeywords
NHS, COVID-19, Coronavirus, Contact tracingStatistical quality
Data prior to 4 September 2021 are those measures as first published. Since the week ending the 11 September 2021 we have been able to provide a calculation of timeliness measures for each positive or close contact which does not alter over time, this day may revise due to positive cases and close contacts being flagged as not eligible following further investigation by contact tracing teams.In these statistics, weeks are defined as Sundays to Saturdays.
The majority of cases not eligible for follow-up by local contact tracers occur in closed settings such as hospitals, care homes and prisons. Positive cases and close contacts residing outside Wales are also not eligible for follow-up and are referred to the relevant public health agency for onward tracing.
The date and time that a positive case or close contact was successfully contacted is taken to be the earliest of a number of events captured in the system. These include:
• successful phone call record (including initial phone call from contact tracers to invite cases and contacts to complete the e-form)
• completion of the contact interview
• first daily check-up
• close contacts or other exposures being entered into the contact tracing system (for positive cases only)
• case marked as ‘resolved’
These events all indicate that a contact tracer has successfully been in touch with the individual. The range of events is necessary because phone call records do not exist for all positive cases and close contacts. This may arise, for example, where multiple cases live in the same household and the information is captured through a single phone call, rather than one for each individual.
