Covid-19 surveillance in dental settings
Report summarising findings of asymptomatic programme August 2020 to April 2021
A Management Information Statistics publication for Scotland
- Published
- 12 May 2021 (Latest release)
- Type
- Statistical report
- Author
- Public Health Scotland
- Coronavirus (COVID-19)
About this release
This report summaries analysis of thirty five weeks of surveillance data collected from asymptomatic patients and staff in dental settings across Scotland from 3rd August 2020 to 1st April 2021. It is part of the wider programme of Enhanced Surveillance of COVID-19 in Scotland (ESoCiS).
Main points
- Over 10,000 patients attending dental clinics across Scotland had a COVID-19 PCR swab test when attending for dental care. In addition, over 800 staff swabs were taken in the final eight weeks of the programme.
- The asymptomatic dental surveillance programme identified that, even though people who have been screened as having no symptoms of COVID-19, they can return a positive test.
- Swab COVID-19 positivity rates reflected the underlying community prevalence from 3rd August 2020 to 1st April 2021. Overall patient test positivity was 0.6% (95%Confidence Interval 0.5%, 0.8%)
- The results are a salient reminder to clinical staff that patients, although asymptomatic, may still harbour the virus, so ongoing adherence to good Infection Prevention Control (IPC) guidance and adequate Personal Protective Equipment (PPE) are important.
- The findings and implications are pertinent for other clinical outpatient settings.
- A serology sub-study was completed involving a small number of staff and patients.
- Dental settings are a feasible setting for population surveillance to be carried out.
Programme week | Samples | Negative | Void | Positive | Percentage positive | Lower CI* | Upper CI* |
---|---|---|---|---|---|---|---|
Week 1 (3 Aug -) | 73 | 72 | 1 | 0 | 0.0 | 0.0 | 5.0 |
Week 2 | 110 | 109 | 1 | 0 | 0.0 | 0.0 | 3.4 |
Week 3 | 89 | 86 | 3 | 0 | 0.0 | 0.0 | 4.1 |
Week 4 | 85 | 85 | 0 | 0 | 0.0 | 0.0 | 4.3 |
Week 5 | 326 | 283 | 43 | 0 | 0.0 | 0.0 | 1.2 |
Week 6 | 343 | 288 | 55 | 0 | 0.0 | 0.0 | 1.1 |
Week 7 | 402 | 384 | 16 | 2 | 0.5 | 0.1 | 1.8 |
Week 8 | 412 | 405 | 7 | 0 | 0.0 | 0.0 | 0.9 |
Week 9 | 413 | 410 | 2 | 1 | 0.2 | 0.0 | 1.4 |
Week 10 | 441 | 421 | 13 | 7 | 1.6 | 0.8 | 3.2 |
Week 11 | 441 | 435 | 5 | 1 | 0.2 | 0.0 | 1.3 |
Week 12 | 524 | 509 | 9 | 6 | 1.1 | 0.5 | 2.5 |
Week 13 | 546 | 526 | 15 | 5 | 0.9 | 0.4 | 2.1 |
Week 14 | 614 | 612 | 1 | 1 | 0.2 | 0.0 | 0.9 |
Week 15 | 608 | 595 | 10 | 3 | 0.5 | 0.2 | 1.4 |
Week 16 | 632 | 620 | 2 | 10 | 1.6 | 0.9 | 2.9 |
Week 17 | 510 | 506 | 3 | 1 | 0.2 | 0.0 | 1.1 |
Week 18 | 431 | 424 | 4 | 3 | 0.7 | 0.2 | 2.0 |
Week 19 | 402 | 394 | 6 | 2 | 0.5 | 0.1 | 1.8 |
Week 20 | 390 | 384 | 3 | 3 | 0.8 | 0.3 | 2.2 |
Week 21 - break | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
Week 22 - break | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
Week 23 (4 Jan - ) | 255 | 248 | 5 | 2 | 0.8 | 0.2 | 2.8 |
Week 24 | 368 | 360 | 4 | 4 | 1.1 | 0.4 | 2.8 |
Week 25 | 317 | 310 | 3 | 4 | 1.3 | 0.5 | 3.2 |
Week 26 | 216 | 212 | 1 | 3 | 1.4 | 0.5 | 4.0 |
Week 27 | 216 | 212 | 2 | 2 | 0.9 | 0.3 | 3.3 |
Week 28 | 149 | 144 | 4 | 1 | 0.7 | 0.1 | 3.7 |
Week 29 | 137 | 135 | 2 | 0 | 0.0 | 0.0 | 3.7 |
Week 30 | 185 | 184 | 1 | 0 | 0.0 | 0.0 | 2.0 |
Week 31 | 180 | 180 | 0 | 0 | 0.0 | 0.0 | 2.1 |
Week 32 | 220 | 215 | 5 | 0 | 0.0 | 0.0 | 1.7 |
Week 33 | 182 | 181 | 1 | 0 | 0.0 | 0.0 | 2.1 |
Week 34 | 133 | 131 | 1 | 1 | 0.8 | 0.1 | 4.1 |
Week 35 (29 Mar - ) | 66 | 64 | 0 | 2 | 3.0 | 0.8 | 10.4 |
Overall Total (Weeks 1-35) | 10,415 | 10,117 | 234 | 64 | 0.6 | 0.5 | 0.8 |
*Confidence interval
Background
Following lockdown in March 2020, Urgent Dental Care Centres (UDCCs) were established across Scotland for dental emergency provision. As patients attending these UDCCs were already making an essential visit outside lockdown restrictions, it was proposed that dentistry should contribute to COVID-19 testing and surveillance. Dental teams could be trained to undertake COVID-19 swab testing and were already wearing appropriate personal protective equipment. Moreover, dental settings in Scotland had previously been shown to be a feasible source of participants, representative of the population for virus (HPV) testing.
PHS established a National Steering Group for surveillance of COVID-19 in dental settings, focussing on asymptomatic patients who had already been screened as free from symptoms prior to their dental appointment1. Two NHS Boards (NHS Fife and NHS Greater Glasgow & Clyde) piloted the programme before it was rolled out.
Further information
The publication will be released on an ad-hoc basis.
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Older versions of this publication
Versions of this publication released before 16 March 2020 may be found on the Data and Intelligence, Health Protection Scotland or Improving Health websites.