The Work Productivity and Activity Impairment Questionnaire for Patients with Gastroesophageal Reflux Disease (WPAI-GERD)

Peter Wahlqvist (), Gordon Guyatt, David Armstrong, Alessio Degl’Innocenti, Diane Heels-Ansdell, Samer El-Dika, Ingela Wiklund, Carlo Fallone, Lisa Tanser, Sander Zanten, Peggy Austin, Alan Barkun, Naoki Chiba and Holger Schünemann

PharmacoEconomics, 2007, vol. 25, issue 5, 385-396

Abstract: The English version of the WPAI-GERD showed good cross-sectional construct validity, and results indicated that the WPAI-GERD is responsive to change. Although the results also indicated that longitudinal construct validity may be poor, the overall findings suggest that further study of the instrument remains warranted. Copyright Adis Data Information BV 2007

Date: 2007
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DOI: 10.2165/00019053-200725050-00003

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