Banafshe Safaeifard, Mehri Ghasemi, Khosro Khademi-Kalantari , Alireza Akbarzadeh-Baghban, Yaghoub Shavehee,
Volume 79, Issue 4 (7-2021)
Abstract
Background: Posturography is a method in which the postural stability of adults is evaluated by measuring the center of pressure sway. This study aims to evaluate the reproducibility of measuring the center of pressure oscillation in standing position with internal perturbation in healthy young women with and without hyperkyphosis.
Methods: Ten women with dorsal hyperkyphosis with the mean age of 23.5±2.65 years and 10 healthy women with the mean age of 21.9±1.3 years (October 2018 to February 2019) were recruited for the study. Subjects were asked to perform rapid bilateral arm elevation while standing on a force plate. Standard deviation of the amplitude and The standard deviation of the velocity of the center of pressure sway in anterior-posterior, Medio-lateral directions and the area of sway were used for statistical analysis. Measurements were carried out by one examiner with a 1-day interval in The Biomechanics laboratory of The School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences. The relative reproducibility of the measurements was calculated by Intra-class Correlation Coefficient (ICC), standard error of measurement (SEM) and minimal detectable changes (MDC).
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Results: The intra-rater reliability of standard deviation of the center of pressure sway velocity and amplitude of both directions in both groups were more than 0.75. The intra-rater reliability of the area of the center of pressure sway in the healthy and hyperkyphosis group were 0.42 and 0.38 respectively.
Conclusion: Standard deviation of the amplitude and standard deviation of the velocity of the center of pressure sway can be considered as reliable variables for assessing static balance in young women with and without dorsal hyperkyphosis in future studies. However, the inconsistency of sway area especially in women with hyperkyphosis suggests that the use of it for differentiation between subjects and the assessment of the outcome of any interventions on the postural stability should be considered with caution.
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Babak Vahdatpour, Mohammad Shirvani, Hamidreza Jahanbani-Ardakani , Omid Alizadehkhaiyat , Sadegh Baradaran Mahdavi ,
Volume 81, Issue 4 (7-2023)
Abstract
Background: The objective of this study was the transcultural adaptation of the Rotator cuff quality of life (RC-QOL) questionnaire and the determination of the reliability and validity of the questionnaire in the Persian-speaking population with rotator cuff disease.
Methods: This study was conducted in Isfahan from April 2022 to February 2023. The participants consisted of 56 people with rotator cuff pathology. The process of adapting and translating the questionnaire was done with the methodology presented previously by Beaton et al. Content validity was first tested by a group of orthopedic and physical medicine and rehabilitation specialists and then through a pilot study consisting of 15 Persian-speaking patients with rotator cuff disease. Test-retest reliability was established with an intraclass correlation coefficient. Internal consistency was calculated using Cronbach's alpha. The measurement's error estimation was calculated with the standard error of the measurement. Reproducibility evaluation was measured with a 3-day interval between the completion of the test-retest questionnaire.
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Results: The age range of the participants was 34 to 68 years (55% men and 45% women). The mean (standard deviation) of the total score of the RC-QOL questionnaire was 44.33(10.81) and ranged from 17.35 to 70.88. Cronbach's alpha was 0.971, which showed high internal consistency. The intraclass correlation coefficient was 0.99, indicating high test-retest reliability. The mean values (standard deviations) of the DASH and SPADI questionnaires were equal to 77.66(13.69) and 66.66(18.25), respectively. The results of the study showed excellent and significant convergent validity of the RC-QOL questionnaire with both the DASH and SPADI questionnaires. The correlation value with the DASH and SPADI questionnaires was equal to 0.907 and 0.941, respectively.
Conclusion: The Persian version of the RC-QOL questionnaire is a valid and reliable tool to evaluate the quality of life in patients diagnosed with rotator cuff injuries.
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