Exploring the use of COVID-19 antigen rapid diagnostic tests among displaced populations in Iraq: findings from a pilot project in four IDP camps.

Abstract

Background: IOM piloted the use of Ag RDTs for COVID-19 in Iraq, in collaboration with FIND, the Global Alliance for Diagnostics, to facilitate access to testing and understand barriers and opportunities for testing in a displacement context. The purpose was to (i) evaluate the performance metrics of the Sure Status COVID-19 Antigen Card Test in this population; (ii) compare Ag RDT results across high- and low-probability cases, vaccination status, and symptom severity; and (iii) report participant perspectives on Ag RDT use for COVID-19 and other diseases.

Methods: Secondary analysis was conducted using de-identified cross-sectional data collected from November 2022-March 2023 in four IDP camps in the Kurdistan region of Iraq. Data was collected during the recording, reporting, and monitoring processes of the pilot project using Ag RDTs for COVID-19 among displaced populations. Descriptive statistics and bivariate analyses were conducted in Stata (version 17).

Results: 9,346 Sure Status Ag RDTs were performed from November 2022-March 2023. Observed performance metrics were as follows: sensitivity = 72.73% (95% CI: 69.56-75.80%); specificity = 99.74% (95% CI: 99.39-100%), PPV = 92.31% (95% CI: 92.31-94.15%), and NPV = 98.85% (95% CI: 98.11-99.58%). Ag RDT uptake was higher among women and symptomatic individuals, and preference for Ag RDTs was especially strong among illiterate respondents. The overall positivity of Ag RDTs and PCR results in this population remained lower than national averages. Concerningly, 23.39% of respondents declined an Ag RDT because they did not believe in COVID-19.

Conclusions: This pilot program was among the first to explore Ag RDT use in Iraqi Kurdistan. Over 99% of respondents reported satisfaction with their experience, and over 90% wanted to see Ag RDTs available for other diseases. Findings can inform implementation of RDTs and screening protocols for other infectious diseases, and patient perspectives on Ag RDTs for testing and screening of COVID-19 among displaced populations can inform health programming within Iraq and globally.