Rasch analysis of the EQ-5D-3L and the EQ-5D-5L in persons with back and neck pain receiving physiotherapy in a primary care context
Aim: The purpose of this study was to investigate the psychometric properties of the EQ-5D-3L and the EQ-5D-5L in patients with back and neck pain. Materials and methods: Participants from two independent clinical survey studies was included in this study. In total 164 participants were answering either the EQ-5D-3L or the EQ-5D-5L after their visit to a physiotherapist in primary care for back an