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Published on: March 14, 2017
Evaluation of knee range of motion: Correlation between measurements using a universal goniometer and a smartphone
Rafael Aparecido Dos Santos1, Viviane Derhon1, Michelle Brandalize2
1State University of Centro-Oeste, Guarapuava, Paraná, Brazil.
Background:
Goniometers are commonly used to measure range of motion in the musculoskeletal system. Recently smartphone goniometry applications have become available to clinicians.
Objective:
Compare angular measures using a universal goniometer and a smartphone application.
Methods:
Thirty four healthy women with at least 20° of limited range of motion regarding knee extension were recruited. Knee flexion angles of the dominant limb were measured with a universal goniometer and the ROM© goniometric application for the smartphone. Three trained examiners compared the two assessment tools.
Results:
Strong correlations were found between the measures of the universal goniometer and smartphone application (Pearson's correlation and interclass correlation coefficient > 0.93). The measurements with both devices demonstrated low dispersion and little variation.
Conclusion:
Measurements obtained using the smartphone goniometric application analyzed are as reliable as those of a universal goniometer. This application is therefore a useful tool for the evaluation of knee range of motion.
