Risk factors for SARS-CoV-2 infection: a test-negative case-control study with additional population controls in Norway.

ABSTRACT:

Objectives

This study aims to assess risk factors for SARS-CoV-2 infection by combined design; first comparing positive cases to negative controls as determined by PCR testing and then comparing these two groups to an additional prepandemic population control group.

Design and setting

Test-negative design (TND), multicentre case-control study with additional population controls in South-Eastern Norway.

Participants

Adults who underwent SARS-CoV-2 PCR testing between February and December 2020. PCR-positive cases, PCR-negative controls and additional age-matched population controls.

Primary outcome measures

The associations between various risk factors based on self- reported questionnaire and SARS-CoV-2 infection comparing PCR-positive cases and PCR-negative co

SUBMITTER: Sarjomaa M 

PROVIDER: S-EPMC10806780 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature