Validation and meaningful within-patient change in work productivity and activity impairment questionnaire (WPAI) for episodic or chronic migraine

• Main Authors: Janet H. Ford (Author), Wenyu Ye (Author), David W. Ayer (Author), Xiaojuan Mi (Author), Swati Bhandari (Author), Dawn C. Buse (Author), Richard B. Lipton (Author)
• Format: Book
• Published: SpringerOpen, 2023-04-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Abstract Background No available studies demonstrate validity and meaningful change thresholds of Work Productivity and Activity Impairment (WPAI) questionnaire in patients with migraine. In this post-hoc analysis, we assessed reliability, validity, responsiveness, and meaningful within-patient chan...