Development and Psychometric Evaluation of the Pain Impact Inventory.
Abstract Objectives: The aim of this study was to develop and psychometrically evaluate an instrument for measuring the impact of chronic pain on daily life. Methods: The study comprised 384 respondents (aged between 18-102 years) who reported chronic pain. The instrument "Pain Impact Inventory" (PII) was evaluated in terms of face, content, construct and criterion validity, as well as two reliabi