Abstract
The motion analysis system has been utilized to record the active range of motion of finger joints. In this study, we evaluated the reliability of motion analysis system in recording the angles of the finger joints. The results showed that the motion analysis system is reliable in recording the angles of the finger joints of normal subjects with an intraclass correlation coefficients of 99.8%, 99.8%, and 97.9% respectively, for MP, PIP, and DIP joints. The corresponding coefficients of variation were 1.9%, 0.8% and 3.1% respectively. The correlation between the angular measurements evaluated by motion analysis system and goniometer was 0.92 for the MP joint, 0.86 for the PIP joint, and 0.78 for the DIP joint. But, the agreement between the angular measurements was still unsatisfactory. Comparisons between these measurements showed signficant differences for all the joints (P=0.0001, P=0.01, and P＜0.0001 respectively, for the MP, PIP, and DIP joints.)
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