Fig. 2From: Chronic widespread pain and its associations with quality of life and function at a 20- year follow-up of individuals with chronic knee pain at inclusionMean SF-36 score in the three groups; NCP, no chronic pain; CRP, chronic regional pain and CWP, chronic widespread pain at 20-year follow-up of individuals with chronic knee pain at inclusion. Swedish norm from Sullivan et al., 2002 [28]Back to article page