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Diagnostic Accuracy of 2 cm Versus 4 cm Insertion Depth for Nasal Swabs for SARS-CoV-2 (COVID-19) Rapid Antigen Testing-A Randomized Controlled Trial

NCT07597889

CompletedNA

Sponsor: Rigshospitalet, Denmark

Conditions: COVID -19

Interventions: 4 cm nasal swab - left nostril, 2 cm nasal swab in the left nostril, 4 cm nasal swab - right nostril, 2 cm nasal swab - right nostril

Countries: Denmark

This study aims to compare the diagnostic accuracy of rapid antigen detection tests (RDTs) for SARS-CoV-2 using nasal swab insertion depths of 2 cm versus 4 cm. The study is an investigator-initiated, randomized clinical trial conducted at a public COVID-19 test center in Copenhagen, Denmark. Following enrollment, participants complete a questionnaire regarding symptoms and vaccination status. Participants are randomized in a 1:1 ratio to one of two sampling sequences: either a 2 cm swab in the left nostril and a 4 cm swab in the right nostril, or vice versa. All participants undergo a healthcare worker-collected throat swab for RT-PCR analysis, which serves as the reference standard for SARS-CoV-2 infection.

Eligibility overview

Sex: ALL

Age: 16 Years to —

Healthy volunteers: Yes

Study type: INTERVENTIONAL

Eligibility criteria

Inclusion Criteria:

* Citizens, aged 16 years or older, showing up for a SARS-CoV-2 RT-PCR test at Testcenter Valby in Copenhagen, Denmark

Exclusion Criteria:

* non-fluent in Danish
* citizens with nasopharyngeal or oropharyngeal anomalies (e.g. neck breathers with tracheostomy)

Locations (1)

Copenhagen, Denmark