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Patients with RA find PGA-VAS confusing, unreliable for ranking disease states

​Vulnerable patients with rheumatoid arthritis experience difficulty with the patient global assessment of disease activity as measured by visual analogue scale, with about 40% finding it confusing, according to findings published in Arthritis Care & Research.
“This study is important because it shows that many of our subjects found the widely used visual analog scale patient global assessments (PGA-VAS) instrument confusing,” Joel Hirsh, MD, of the Denver Health and Hospital Authority, told Healio Rheumatology. “This is concerning given that different versions of the PGA-VAS are included in all RA composite disease activity indices.”