INTRA-EXAMINER RELIABILITY AND VALIDITY CRITERIA OF A SMARTPHONE APPLICATION TO MEASURE THE TEST FLEXION-ROTATION IN CERVICAL SPINE IN ASYMPTOMATIC SUBJECTS
Keywords:
range of motion, reliability, criterion validity, cervical spine, cervical flexion-rotation test.Abstract
Introduction: Nowadays we have Smartphones, applications that can carry out the functions of other measuring instruments. The purpose of this study was to analyze the intra-rater reliability as well as the criterion validity of the Compass app in measuring cervical flexion-rotation test in cervical spine in asymptomatic subjects. Mate-rial and method: The sample was 42 asymptomatic subjects. One examiner measured the range of motion in the cervical flexion-rotation test of each patient twice using Compass app and afterwards twice using the Cervical Range of Motion device. In order to calculate the intra-rater reliability and the criterion validity we used the intra-class correlation coefficient. Results: Excellent intra-rater reliability was observed for the cervical flexion-rotation test using Compass app and the value of intraclass correlation coefficient was 0.94. For the criterion validity of Com-pass app, the value of the intraclass correlation coefficient was 0.87 and the value of the kappa index was 0.533.
Discussion: Apart from the shown reliability and validity, Compass is an economical and available tool to measure the range of movement of the flexion rotation test. However, for using Compass as a measurement instrument in the clinic, we should carry out the study in patients who have cervical dysfunctions. Conclusions: We found Excellent intra-rater reliability for Compass to measure the flexion rotation test in healthy patients. When we compared Compass to Cervical Range of Motion, this app showed good validity.
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