Abstract
[Purpose] This study aimed to verify the reliability and validity of “the sense of position” application (APP) for measurements of joint-position sense with a smartphone. [Subjects and Methods] Ten young healthy adults were recruited for the reliability analysis, and 2 young healthy adults for the validity analysis. The position sense of the right elbow joints was measured using the APP. Test-retest reliability was evaluated by calculating intraclass correlation coefficients (ICC), and the validity was determined by calculating Pearson’s correlation coefficients for the values measured using the APP and digital images. The number of required measurements was determined using the ICC calculated from the mean value of each measurement. [Results] A high reproducibility was found for the values of elbow joint-position sense measured using the APP, as well as a strong correlation with values measured on digital images. In addition, a high reliability was found when the measurement was performed 5 or more times. [Conclusion] The APP developed by us showed high reliability and validity for measurements of young healthy adults. The results of this study demonstrated that the APP enabled the assessment of elbow joint-position sense, suggesting its potential application in clinical practice or other areas.
