NCT05215483

Availability and Advice on Test Uptake During the COVID-19 Pandemic: a Vignette Study.

Availability and Advice on Test Uptake During the COVID-19 Pandemic: a Vignette Study on Lateral Flow Testing Policy in the Netherlands.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 3,270 (actual)
• Sponsor: National Institute for Public Health and the Environment (RIVM) · Other Government
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

Lateral Flow Testing (LFT) use for COVID-19 related symptoms continues to rise, despite governmental advice to test at a test facility. In this study we investigate whether 1) adjusting the governmental testing advice will lead to a collective increase of people who test with COVID-19 symptoms and if this leads to a higher strategy sensitivity.

Detailed description

In an online randomised multi-factorial survey (vignette study) participants are randomised to assess four scenario's. Between subject testing advise is randomised (IV1; 2 levels) and the availability of LFT (IV2; 2 levels). Within subject we asked participants to assess their most likely behaviour on day 1 of symptoms and day 3 of unchanged symptoms (IV3; 2 levels). Corona-related symptoms are randomly presented (IV4; 4 levels) and new incidences of symptoms are presented in additional vignettes describing new months (IV5; 4 levels). Subjects are asked to immerse themselves in the scenario's before answering what their most likely behaviour would be: a) go to a test facility b) use a LFT c) wait and see or 4) no test. Participants who didn't choose the test facility on day 1 were presented with the same vignette on day 3 with unchanged symptoms, and were asked their most likely behaviour again. After assessing the scenario's, participants fill in a questionnaire assessing demographics, behavioural determinants related to test behaviour, vaccine status, current symptoms and previous experience with Corona and testing. The primary outcomes is defined as the average strategy sensitivity over time and therefore the chance of detecting a Covid-infection. Average strategy sensitivity is calculated by converting the choice of testing behaviour into the corresponding sensitivity score (PCR =1, LFT day 1 = .8, LFT day 3 = .7, wait and see and no test = 0), averaged over four scenario's. Our primary hypothesis is: 1. Adjusting the governmental testing advice will lead to a higher strategy sensitivity. In follow-up analysis we will explore the following hypothesis: 2. Availability of LFT at home will lead to a higher strategy sensitivity. 3. The type of corona related symptoms (mild or severe) are predictive of the type of test used. 4. When confronted with a new incidence of corona-related symptoms over time, strategy sensitivity will decline.

Conditions

• COVID-19

Interventions

Type	Name	Description
BEHAVIORAL	Customised testing advice	Customised advice: With Corona related symptoms, get tested at a test facility. If this isn't possible, use a Lateral Flow test.
BEHAVIORAL	Regular testing advice	Government guideline testing advice: "With Corona related symptoms, get tested at a test facility".
BEHAVIORAL	LFT available	LFT availability: Enough lateral flow tests available at home
BEHAVIORAL	No LFT available	LFT availability: No lateral flow tests available at home

Timeline

• Start date: 2021-11-11
• Primary completion: 2021-11-16
• Completion: 2021-11-16
• First posted: 2022-01-31
• Last updated: 2022-01-31

Locations

1 site across 1 country: Netherlands