Validity and reliability of the COVID-19 symptom index, an instrument evaluating severity of general and otolaryngological symptoms

There is no clinical instrument evaluating symptoms of COVID-19. To develop a clinical instrument for evaluating symptoms of COVID-19 mild-to-moderate forms. COVID-19 patients were recruited from EpiCURA Hospital (Belgium). They completed the COVID-19 Symptom Index (CSI) twice to assess the test-ret...

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Bibliographic Details
Published in:Acta oto-laryngologica 2021-06, Vol.141 (6), p.615-620
Main Authors: Lechien, Jérôme R., Chiesa-Estomba, Carlos M., Hans, Stephane, Calvo-Henriquez, Christian, Mayo-Yáñez, Miguel, Tucciarone, Manuel, Vaira, Luigi A., Saussez, Sven, Saibene, Alberto M.
Format: Article
Language:English
Subjects:
Adult
Case-Control Studies
clinical
coronavirus
COVID-19
COVID-19 - diagnosis
Fatigue - etiology
Female
follow-up
Headache - etiology
Humans
instrument
Male
Myalgia - etiology
patient-reported outcome questionnaire
questionnaire
Reproducibility of Results
SARS-CoV-2
Severity of Illness Index
symptom
Symptom Assessment
validity
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Summary:There is no clinical instrument evaluating symptoms of COVID-19. To develop a clinical instrument for evaluating symptoms of COVID-19 mild-to-moderate forms. COVID-19 patients were recruited from EpiCURA Hospital (Belgium). They completed the COVID-19 Symptom Index (CSI) twice to assess the test-retest reliability. The internal consistency was evaluated with Cronbach's alpha. CSI was completed by healthy subjects to assess the internal validity. Patients completed CSI 6 weeks after the COVID-19 resolution to evaluate the responsiveness to change. Ninety-four COVID-19 patients and 55 healthy individuals completed the evaluations. Symptoms associated with the higher severity score were fatigue, headache and myalgia. The Cronbach's alpha value was 0.801, indicating high internal consistency. The test-retest reliability was adequate (r s  = 0.535, p = .001). The correlation between CSI total score and SNOT-22 was high (r s  = 0.782; p 
ISSN:0001-6489
1651-2251
DOI:10.1080/00016489.2021.1899282