The Reliability and Validity of Hip Range of Motion Measurement using a Smart phone Operative Patient

엉덩관절 수술 환자에서 스마트폰을 이용한 관절가동범위 측정의 신뢰도 및 타당도 연구

Park, Sun-Wook;Kim, Myoung-Soo;Bae, Hyo-Sun;Cha, Yong-Ho

  • Received : 2015.02.23
  • Accepted : 2015.03.18
  • Published : 2015.05.31


PURPOSE: The aims of this study were to assess the intra-tester and inter-tester reliability and validity of hip range of motion using a smart phone in hip operative patients. METHODS: Twenty-five patients (eight total hip arthroplasty and seventeen femur neck fracture) participated in this study. The range of motions in active and passive hip flexion, abduction and external rotation were measured with a goniometer and smart phone over two times by two observers. The intra-tester and inter-tester reliability were evaluated using the intraclass correlation coefficient (ICC2,1). The validity was measured by Pearson's correlation coefficient RESULTS: The intra-observer reliability was good in all measured items (ICC>0.78). The inter-observer reliability was high with ICC (>0.90). All correlation coefficients of smart phone and goniometer was greater than 0.85 and showed a significant positive correlation (p<0.01). CONCLUSION: The range of motion measurement with a smart phone showed acceptable reliability. Therefore, it could be convenient and have economical benefits to measure the range of motion of the hip joint using a smart phone.


Hip joint;Range of motion;Reliability and Validity;Smart phone


  1. Bedekar N, Suryawanshi M, Rairikar S, et al. Inter and intra-rater reliability of mobile device goniometer in measuring lumbar flexion range of motion. J Back Musculo skelet Rehabil. 2014;27(2):161-6.
  2. Bierma-Zeinstra SM, Bohnen AM, Ramlal R, et al. Comparison between two devices for measuring hip joint motions. Clin Rehabil. 1998;12(6):497-505.
  3. Charlton PC, Mentiplay BF, Pua YH, et al. Reliability and concurrent validity of a Smart phone, bubble inclinometer and motion analysis system for measurement of hip joint range of motion. J Sci Med Sport. 2015;18(3):262-7.
  4. Cools AM, De Wilde L, Van Tongel A, et al. Measuring shoulder external and internal rotation strength and range of motion: comprehensive intra-rater and inter-rater reliability study of several testing protocols. J Shoulder Elbow Surg. 2014;23(10):1454-61.
  5. De Winter AF, Heemskerk MA, Terwee CB, et al. Inter-observer reproducibility of measurements of range of motion in patients with shoulder pain using a digital inclinometer. BMC Musculoskelet Disord. 2004;14(5):18.
  6. Fermanian J. Measuring agreement between 2 observers:Aquantitative case. Rev Epidemiol Sante Publique. 1984;32(6):408-13.
  7. Green S, Buchbinder R, Forbes A, et al. A standardized protocol for measurement of range of movement of the shoulder using the Plurimeter-V inclinometer and assessment of its intra-rater and inter-rater reliability. Arthritis Care Res. 1998;11(1):43-52.
  8. Holm I, Bolstad B, Lutken T, et al. Reliability of goniometric measurements and visual estimates of hip ROM in patients with osteoarthrosis. Physiother Res Int. 2000;5(4):241-8.
  9. Hoving JL, Buchbinder R, Green S, et al. How reliably do rheumatologists measure shoulder movement? Ann Rheum Dis. 2002;61(7):612-6.
  10. Johnston RC, Fitzgerald RH, Harris WH, et al. Clinical and radiographic evaluation of total hip replacement. A standard system of terminology for reporting results. J Bone Joint Surg Am. 1990;72(2):161-8.
  11. Kolber MJ, Vega F, Widmayer K, et al. The reliability and minimal detectable change of shoulder mobility measurements using a digital inclinometer. Physiother Theory Pract. 2011;27(2):176-84.
  12. Lea RD, Gerhardt JJ. Range-of-motion measurements. J Bone Joint Surg Am. 1995;77(5):784-98.
  13. Milanese S, Gordon S, Buettner P, et al. Reliability and concurrent validity of knee angle measurement: Smart phone app versus universal goniometer used by experienced and novice clinicians. Man Ther. 2014;19(6):569-74.
  14. Portney LG, Watkins MP. Foundations of Clinical Research:Applications to Practive(2nd ed). New Jersey. Prentice Hall. 2000.
  15. Quek J, Brauer SG, Treleaven J, et al. Validity and intra-rater reliability of an android phone application to measure cervical range-of-motion. J Neuroeng Rehabil. 2014;11:65.
  16. Shin SH, Ro du H, Lee OS, et al. Within-day reliability of shoulder range of motion measurement with a smartphone. Man Ther. 2012;17(4):298-304.
  17. Werner BC, Holzgrefe RE, Griffin JW, et al. Validation of an innovative method of shoulder range-of-motion measurement using a smartphone clinometer application. J Shoulder Elbow Surg. 2014;23(11):e275-e82.
  18. Wu W, Dasgupta S. Ramirez EE, et al. Classification accuracies of physical activities using smartphone motion sensors. J Med Internet Res. 2012;14(5);e130.

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