A multicenter international prospective study of the validity and reliability of a COVID-19-specific health-related quality of life questionnaire.

Purpose: To develop and validate a health-related quality of life (HRQoL) questionnaire for patients with current or previous coronavirus disease (COVID-19) in an international setting.

Methods: This multicenter international methodology study followed standardized guidelines for a four-phase questionnaire development. Here, we report on the pretesting and validation of our international questionnaire.

Health-related quality of life in patients with COVID-19; international development of a patient-reported outcome measure.

Background: We aimed to create a questionnaire to assess the health-related quality of life including functioning, symptoms, and general health status of adult patients with current or previous COVID-19. Here, we report on Phase I and II of the development.

Methods: Internationally recognized methodology for questionnaire development was followed.

Health-related quality of life issues, including symptoms, in patients with active COVID-19 or post COVID-19; a systematic literature review.

Purpose: This systematic review was performed to identify all relevant health-related quality of life (HRQoL) issues associated with COVID-19.

Methods: A systematic literature search was undertaken in April 2020. In four teams of three reviewers each, all abstracts were independently reviewed for inclusion by two reviewers.