RT Journal Article SR Electronic T1 Bias in the Methodology: Sleep Quality Is Related to Worsening Knee Pain in Those With Widespread Pain JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.201165 DO 10.3899/jrheum.201165 A1 Chieh-Chun Yang A1 Po-Cheng Hung YR 2020 UL http://www.jrheum.org/content/early/2020/10/13/jrheum.201165.abstract AB We read with great interest the article in The Journal entitled, “Sleep Quality Is Related to Worsening Knee Pain in Those with Widespread Pain: The Multicenter Osteoarthritis Study” by Dai, et al1. The authors reported the association between sleep quality and odds of developing knee pain, and how widespread pain modified this relationship.