Volume 2 Supplement 1
TRACE (Trunk Aesthetic Clinical Evaluation), a new everyday clinical tool to assess adolescent idiopathic scoliosis patients aesthetics
© Negrini et al; licensee BioMed Central Ltd. 2007
Published: 12 October 2007
Evaluate the repeatability of a new everyday clinical tool developed to increase Aesthetic Index results: TRACE (Trunk Aesthetic Clinical Evaluation).
TRACE is based on four sub-scales: shoulders (0–3), scapulae (0–2), hemithorax (0–2) and flanks (0–4): each point is fully described and gives an ordinal scale for increasing asymmetry; TRACE 1 was given by the sum of the sub-score, while TRACE2 by a percentage weighting each single sub-score. 160 PA photographs of the trunk of adolescent idiopathic scoliosis patients were scored two times independently by four observers. We used the Kappa statistics for Agreement  whose values give the following agreements: 0–0.2 poor, 0.2–0.4 fair, 0.4–0.6 moderate, 0.6–0.8 good, 0.8–1.0 very good. We looked also at the 95% level of agreement, to identify the minimum clinically significant change to be considered between two different clinical exams. TRACE2 was evaluated for repeatability according to Bland-Altman.
Kappa statistics range
Percent of agreement
95% level of agreement (range)
These results are provisional, because a longer practice on TRACE is needed, mainly for inter-raters data. Widening the scales of the Aesthetic Index to develop TRACE increased sensitivity, and this is better in clinical everyday practice.
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This article is published under license to BioMed Central Ltd.