Measurement of Depression and Anxiety in Chronic Low Back Pain and Fibromyalgia: A Validity Comparison of Four Patient-Reported Outcome Measures

Depression and anxiety are highly prevalent in chronic pain and predictive of course. The aim was to evaluate and compare the content validity and cross-sectional and longitudinal construct validity (responsiveness) of the depression and anxiety scales of four patient-reported outcome measures in chronic low back pain and fibromyalgia, before and after a standardized pain program.