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Reliability of Center of Pressure Measures of Postural Stability in Patients With Unilateral Anterior Cruciate Ligament Injury Publisher



Hadian MR1 ; Negahban H1 ; Talebian S1 ; Salavati M2 ; Jafari AH3 ; Sanjari MA4 ; Mazaheri M5 ; Parnianpour M6
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Authors Affiliations
  1. 1. Department of Physical Therapy, School of Rehabilitation Sciences, Medical Sciences/University of Tehran, Tehran, Iran
  2. 2. Department of Physical Therapy, University of Social Welfare and Rehabilitation, Tehran, Iran
  3. 3. Department of Bioengineering, Research and Science Branch, Islamic Azad University, Tehran, Iran
  4. 4. Rehabilitation Research Center, Faculty of Rehabilitation, Iran University of Medical Sciences, Tehran, Iran
  5. 5. Musculoskeletal Research Center, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
  6. 6. Faculty of Mechanical Engineering, Sharif University of Technology, Tehran, Iran

Source: Journal of Applied Sciences Published:2008


Abstract

The aim of this study was to estimate the test-retest reliability of some commonly used center of pressure measures in postural control investigations of sport injuries under the diverse stressful postural conditions. Twelve patients with anterior cruciate ligament injury were evaluated on two separate sessions. The center of pressure was recorded from force platform and the following measures were calculated (1) standard deviation of amplitude (2) mean velocity (3) standard deviation of velocity (4) phase plane parameters and (5) area (95% confidence ellipse). Relative and absolute reliability was assessed using intra-class correlation coefficient and coefficient of variation, respectively. Mean velocity and total phase plane parameters were the most reliable measures having high to very high correlation across all postural conditions. The mean and range of intra-class correlation coefficient for mean velocity and total phase plane parameters were 0.88 (range: 0.80 to 0.96) and 0.81 (range: 0.71 to 0.88), respectively. Interestingly, pattern of the coefficient of variation values was, to a great extent, consistent with the intra-class correlation coefficients. Therefore, mean velocity and total phase plane parameters may be sensitive center of pressure measures to differentiate balance between Anterior Cruciate Ligament (ACL) injured patients and to evaluate the effect of a rehabilitation program in this population. © 2008 Asian Network for Scientific Information.
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