Article2018

Measurement of knee joint range of motion with a digital goniometer: A reliability study

Melanie Svensson · Veronika Lind · Marita Löfgren Harringe

47 citations0/0 files storedPhysiotherapy Research International

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Reliability and Agreement in Measurement Musculoskeletal pain and rehabilitation Lower Extremity Biomechanics and Pathologies

Abstract

OBJECTIVES: Measurements of joint range of motion (ROM) are part of a physical therapist's daily work. Activities of daily living and exercises can be complicated to perform when ROM is limited, and depending on the demands in daily living, the knee joint requires different ROM. In sports, a few degrees in ROM may make the difference between getting injured or not. The goals for physical therapists are to help the patients to regain full ROM, mobility, strength, and function after sustaining an injury. To measure joints with the manual universal goniometer is considered time-consuming and difficult with respect to repeated measurements. Recently, a new digital instrument for measuring ROM was developed-EasyAngle. A first objective of the study was to investigate the reliability of EA for measuring knee joint angles, considering intrarater and interrater reliability. A second objective was to investigate if there were any differences in the intrarater reliability between a novice and an experienced assessor. METHOD: Passive knee angles were measured in fixed positions for 40 knee joints (20 subjects). Two registered physical therapists, one novice and one experienced, conducted the measurements. Both registered physical therapists were blinded to the measurements throughout the study. RESULTS: The results showed very good intrarater (intraclass correlation coefficient [ICC] 0,997-0,998, standard error of mean 1.15-1.48, smallest detectable difference [SDD] 3.19-4.09, limits of agreement -3.36-3.04, -4.66-4.09) and interrater reliability (ICC 0.994, standard error of mean 2.11, SDD 5.85, limits of agreement -4.75-6.95) for measurements of knee joint ROM. No statistical difference between a novice and an experienced assessor was detected (p = 0.86). CONCLUSION: The results of the present study showed very good ICC values for both intrarater and interrater reliability measuring knee joint ROM with EasyAngle. Relatively high SDD values were seen for both assessors and may indicate a problem monitoring small differences between measurements. Further studies are recommended to increase the generalizability of the results.

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References

2011Guidelines for Reporting Reliability and Agreement Studies (GRRAS) were proposed 1987Clinical Measurement of Range of Motion 2000Reliability: What is it, and how is it measured?1994Statistical Methodology for the Concurrent Assessment of Interrater and Intrarater Reliability: Using Goniometric Measurements as an Example 1978Reliability of Goniometric Measurements 1983Goniometric Reliability in a Clinical Setting 1991Reliability of Goniometric Measurements and Visual Estimates of Knee Range of Motion Obtained in a Clinical Setting 1987Reliability and Validity of Goniometric Measurements at the Knee

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2023Analysis of the concurrent validity and reliability of five common clinical goniometric devices 2020Smartphone goniometer has excellent reliability between novice and experienced physical therapists in assessing knee range of motion

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