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The online version of this article (doi:10.1186/1757-1146-1-3) contains supplementary material, which is available to authorized users.
The authors declare that they have no competing interests.
TGM conceived the study, participated in the design of the study, and carried out data analyses. MWC conceived the study, participated in the design of the study, and carried out data analyses. LM coordinated and carried out data analyses. BV participated in the design of the study and carried out data analyses. KKF coordinated and carried out data analyses. DH coordinated and carried out data analyses.
A study was conducted to determine the reliability and validity of a new foot mobility assessment method that utilizes digital images to measure the change in dorsal arch height measured at 50% of the length of the foot during the Sit-to-Stand test.
Two hundred – seventy five healthy participants participated in the study. The medial aspect of each foot was photographed with a digital camera while each participant stood with 50% body weight on each foot as well as in sitting for a non-weight bearing image. The dorsal arch height was measured at 50% of the total length of the foot on both weight bearing and non-weight bearing images to determine the change in dorsal arch height. The reliability and validity of the measurements were then determined.
The mean difference in dorsal arch height between non-weight bearing and weight bearing was 10 millimeters. The change in arch height during the Sit-to-Stand test was shown to have good to high levels of intra- and inter-reliability as well as validity using x-rays as the criterion measure.
While the navicular drop test has been widely used as a clinical method to assess foot mobility, poor levels of inter-rater reliability have been reported. The results of the current study suggest that the change in dorsal arch height during the Sit-to-Stand test offers the clinician a reliable and valid alternative to the navicular drop test.
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- Arch height change during sit-to-stand: an alternative for the navicular drop test
Thomas G McPoil
Mark W Cornwall
- BioMed Central