Sarvenaz Karimi Ghasem Abad1, Behnam Akhbari2, Mahyar Salavati3, Saeed Talebian Moghaddam4, Ahmad Saeedi5, Mahsa Seydi6, Mahnaz Ahangari7, Hosein Negahban8. 1. Physiotherapy Department of University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Electronic address: skarimi.pt86@gmail.com. 2. Physiotherapy Department of University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Electronic address: be.akhbari@uswr.ac.ir. 3. Physiotherapy Department of University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Electronic address: mahyarsalavati@gmail.com. 4. Physiotherapy Department of Tehran University of Medical Sciences, Tehran, Iran. Electronic address: talebian@tums.ac.ir. 5. Department of Statistical Research and Information Technology, Institute for Research and Planning in Higher Education, Tehran, Iran. Electronic address: a_saidee@yahoo.com. 6. Physiotherapy Department of University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Electronic address: Mseydi70@gmail.com. 7. Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 8. Department of Physical Therapy, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: honegahban@yahoo.com.
Abstract
BACKGROUND: The aim of this study is to evaluate the test-retest reliability of the Center of Pressure (COP) parameters in quiet double-leg standing in subjects with Non-Specific Chronic Low Back Pain (NSCLBP) during dual taking associated with manipulated visual and somatosensory inputs. MATERIALS AND METHODS: In this observational cross-sectional study, the static balance of thirty NSCLBP patients were assessed during a double-leg stance by using the force platform. Subjects were accosted by manipulated somatosensory and visual inputs during dual taking in eight different conditions (with and without vibration, eyes-open and eyes-closed, and with and without auditory Stroop test). The COP parameters were recorded as follows: range sideways and range fore-aft as well as mean velocity and area variables. The cognitive task parameters included the reaction time and error ratio. The intra-class correlation coefficient (ICC) was computed to assess the intersession reliability of COP parameters. RESULTS: in intersession, range sideways, range fore-aft, and mean velocity measures possessed moderate to high ICC, but area owned high ICC only in one condition (double-leg stance, eyes-close, with vibration, and with auditory Stroop test). Notably, other conditions had low ICC, and moderate to high and low to very high ICC were reported for reaction time and error ratio. CONCLUSION: Among the parameters studied in the present study, the mean velocity measure seems to be the most reliable variable of postural control in the subjects with NSLBP especially in more challenging conditions, i.e., quiet double-leg standing with eyes closed and adding vibratory inputs during dual-tasking.
BACKGROUND: The aim of this study is to evaluate the test-retest reliability of the Center of Pressure (COP) parameters in quiet double-leg standing in subjects with Non-Specific Chronic Low Back Pain (NSCLBP) during dual taking associated with manipulated visual and somatosensory inputs. MATERIALS AND METHODS: In this observational cross-sectional study, the static balance of thirty NSCLBP patients were assessed during a double-leg stance by using the force platform. Subjects were accosted by manipulated somatosensory and visual inputs during dual taking in eight different conditions (with and without vibration, eyes-open and eyes-closed, and with and without auditory Stroop test). The COP parameters were recorded as follows: range sideways and range fore-aft as well as mean velocity and area variables. The cognitive task parameters included the reaction time and error ratio. The intra-class correlation coefficient (ICC) was computed to assess the intersession reliability of COP parameters. RESULTS: in intersession, range sideways, range fore-aft, and mean velocity measures possessed moderate to high ICC, but area owned high ICC only in one condition (double-leg stance, eyes-close, with vibration, and with auditory Stroop test). Notably, other conditions had low ICC, and moderate to high and low to very high ICC were reported for reaction time and error ratio. CONCLUSION: Among the parameters studied in the present study, the mean velocity measure seems to be the most reliable variable of postural control in the subjects with NSLBP especially in more challenging conditions, i.e., quiet double-leg standing with eyes closed and adding vibratory inputs during dual-tasking.