Test - retest reliability and criterion - related validity of smartphone application to assessment back range of motion in individuals without lower back pain
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Abstract
Background: Back range of motion (ROM) testing can be used as a physical assessment method. An application for Android smartphones has been developed to measure a range of motion with the data automatically stored on the data server for ease of use.
Objective: The aims of this study were to investigate the test-retest reliability and criterion-related validity of an Android smartphone application to measure active lower back flexion and extension (ROM) compared to double bubble inclinometers in a standing position for individuals without lower back pain.
Methods: Thirty participants without lower back pain were tested both active flexion and extension of the lower back ROM by using the smartphone application and double bubble inclinometers. Intraclass correlation coefficient (ICC) models were used to determine reliability. An agreement between the two instruments, the standard error of measurements (SEMs) and the criterion-related validity were reported.
Results: The smartphone application demonstrated excellent reliability for both back flexion and back extension. The ICC showed a very high agreement between the two instruments. The SEMs of reliability was reported less than 1.5o. Moreover, there was a very high correlation between the two instruments for criterion-related validity.
Conclusion: The smartphone application is valid and reliable for measuring lower back ROM in flexion and extension.
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References
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