http://www.scoliosis.org/store/scoliometer.php

The results of the Scoliometer can indicate problems, and some experts believe it is a useful device for widespread screening. Scoliometers, however, measure rib cage distortions in more than half of children who turn out to have very minor or no sideways curves. Scoliometers are not accurate enough to guide treatment, and, if results show a deformity, x-rays need to be performed.
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http://informahealthcare.com/doi/pdf...53679708996700

The correlation coefficient between the ATR and Cobb angle in right convex curves was 0.65 compared to 0.57 in left convex curves.
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http://journals.lww.com/spinejournal...cy_and.11.aspx

Conclusions. The Scoliometer and Adam's forward bend tests have adequate interexaminer reliability for the assessment of thoracic curves. The Scoliometer has better interexaminer agreement in the lumbar spine. However, the Scoliometer has a high level of interexaminer measurement error that limits its use as an outcome instrument. Because Adam's forward bend test is more sensitive than the Scoliometer, the authors believe that it remains the best noninvasive clinical test to evaluate scoliosis.