{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T12:31:27Z","timestamp":1784118687014,"version":"3.55.0"},"reference-count":26,"publisher":"The Journal of Rheumatology","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2010,7]]},"abstract":"<jats:sec><jats:title>Objective.<\/jats:title><jats:p>To evaluate the measurement properties of 21-numbered circle visual analog scales (VAS) and traditional 10-cm horizontal line VAS for physician and parent subjective ratings in children with juvenile idiopathic arthritis (JIA).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>We studied 2 patient samples in whom physician global rating of overall disease activity, parent global rating of the child\u2019s overall well-being, and parent rating of intensity of child\u2019s pain were performed using traditional 10-cm horizontal line VAS (n = 397) or 21-numbered circle VAS (n = 471). The measurement performances of the 2 VAS formats were examined by assessing construct validity, score distribution, responsiveness to change over time, and minimal clinically important difference (MCID).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>Most Spearman correlations with other JIA outcome measures yielded by 21-numbered circle VAS were greater than those obtained with 10-cm horizontal line VAS, revealing that the circle VAS format has better construct validity. Ceiling effects (i.e., score = 0) for physician and parent global ratings were 43.7% and 32.9%, respectively, on 21-numbered circle VAS, and 31.6% and 35.3%, respectively, on 10-cm horizontal line VAS. Responsiveness of 21-numbered circle VAS was good (standardized response mean &gt; 0.8) or moderate (standardized response mean &gt; 0.6) among patients classified as improved or worsened, respectively, by the physician or the parent. Overall, MCID values for 21-numbered circle VAS tended to be greater for worsening than for improvement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>The 21-numbered circle VAS are a suitable alternative to the 10-cm horizontal line VAS and may facilitate incorporation of physician and parent subjective ratings in standard clinical practice.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.091474","type":"journal-article","created":{"date-parts":[[2010,6,15]],"date-time":"2010-06-15T20:55:52Z","timestamp":1276635352000},"page":"1534-1541","source":"Crossref","is-referenced-by-count":132,"title":["Evaluation of 21-Numbered Circle and 10-Centimeter Horizontal Line Visual Analog Scales for Physician and Parent Subjective Ratings in Juvenile Idiopathic 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