Reliability of Foot Photo Box in measuring selected footprint indexes

Measuring medial longitudinal arch of the foot is considered as the most important reference to identify foot disorders and to follow up treatment procedure and using footprint indexes is known as the most common method to evaluate medial longitudinal arch of foot. The aim of this study was to determine the reliability of Foot Photo Box in measuring selected footprint indexes.
Design of Foot Photo Box was set based on a camera and image processing technique .In order to determine the reliability of the new device, 30 male and female subjects with the average age 25.33±3.08 years, the weight 61.53±9.6 Kg, the height 168.23±9.16 cm and the body mass index 21.70±2.32 were randomly selected among the statistical population .Measurement of the footprints were repeated for 3 continuous days. To determine the reliability of the foot photo box, interclass Correlation Coefficient (ICC) and standard error of measurement (SEM) were used and significant level set at p Interclass correlation coefficient between the 3 measurements of all footprint indexes was very strong (high). Staheli index was the most reliable index (ICC=0/96), and further the arch index (ICC=0.95), chippaux-smirak index (ICC=0.95), and footprint index (ICC=0.94) also can be considered as a reliable one.
Results of this research showed that Foot Photo Box is a reliable devise in measuring common footprint indexes; therefore using this device is suggested for accurate and rapid measurement of footprint indexes in clinical and research centers.