The purpose of this study was to examine the reliability of the method when different therapists measured the same subject, when the same therapist measured one subject on different days, and when the same therapist measured one subject over three successive repetitions.
As a result of analysis of variance, according to each variance, the mean measurements for trunk motion, statistically significant differences in the means were found between raters.
That is, forward bending and backward bending had P-value of 0.03 and 0.04 each, showing statistically significant differences(P<0.05).
Right rotation had P-value of 0.01, showing very significant difference, but side bending didn´t show difference(P=0.50).
Besides, between days, right rotation had P-value of 0.02, showing statistically significant difference, but other motions didn´t clear differences.
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