A Scoliometer was used by one observer (RKP) to assess the reproducibility of angle of trunk inclinations (ATIs) in 13 preoperative patients with AIS (thoracic 7, thoracolumbar 6, mean Cobb angle 50 degrees, right 9, age 15.4 years, girls 10). Three positions were used namely standing forward-bending, (FB) sitting FB and prone. Readings of ATI on the back were obtained at each of 10 levels (T1-S1). The subject was repositioned after walking around the room and a second set of readings obtained (repeats). All readings were converted by a computer program to 18 levels and plotted. The readings from 18 levels were analysed by level, as well as summated and averaged both without and with correction for the side of the curve. Conclusions. Back surface asymmetry measured with a Scoliometer in these preoperative patients with AIS is less in the prone position than in each of the forward bending positions. The standing FB position has the best reproducibility which supports the practice of using this position to measure Scoliometer ATIs in preoperative patients with AIS
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