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      Reliability and Validity of Computer-Assisted Estimates of Tanner-Whitehouse Skeletal Maturity (CASAS): Comparison with the Manual Method

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          Abstract

          Three observers rated 57 X-rays from normal healthy children in Project HeartBeat! twice each by CASAS, the computer-assisted version of the TW2 RUS bone age method. Differences between duplicates of individual bone ratings which reached or exceeded 1.0 unit (or 1 stage) were 5% within observer and 8% between observers for CASAS, and 17 and 33%, respectively, for the unassisted MANUAL method. In children followed longitudinally, CASAS scores increased much more steadily than MANUAL scores, largely because the bones were rated, in the former system, on a continuous rather than a discrete-integer scale. We conclude that CASAS is a more reliable and probably a more valid estimator of skeletel maturity than the MANUAL version of the TW2 RUS method.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          1994
          1994
          05 December 2008
          : 42
          : 6
          : 288-294
          Affiliations
          aWHO Collaborative Centre for Growth and Development, Institutes of Education and Child Health, University of London, UK; bEpidemiology Research Center, School of Public Health, University of Texas, Houston, Tex., USA
          Article
          184211 Horm Res 1994;42:288–294
          10.1159/000184211
          7698726
          © 1994 S. Karger AG, Basel

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          Page count
          Pages: 7
          Categories
          Original Paper

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