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Persian Translation and Validation of the Kujala Patellofemoral Scale in Patients With Patellofemoral Pain Syndrome Publisher Pubmed



Negahban H1 ; Pouretezad M1 ; Yazdi MJS1 ; Sohani SM2 ; Mazaheri M3 ; Salavati M4 ; Aryan N5 ; Salehi R1
Authors
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Authors Affiliations
  1. 1. Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
  2. 2. Department of Physical Therapy, School of Rehabilitation Sciences, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Musculoskeletal Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Physical Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
  5. 5. Department of Physical Education and Sport Sciences, Faculty of Sport Science and Physical Education, University of Guilan, Guilan, Iran

Source: Disability and Rehabilitation Published:2012


Abstract

Purpose: To culturally translate and validate the Persian version of Kujala Patellofemoral Scale (KPS) and evaluate the test-retest reliability, internal consistency, construct validity and ceiling or floor effects of this instrument in patients with patellofemoral pain syndrome (PFPS). Method: After standard forward and backward translations, 100 patients with PFPS completed the Persian versions of the KPS and Short-Form 36 Health Survey (SF-36) in the first visit. With time interval of 23 days after the first visit, 47 patients filled out the KPS in the second visit. Test-retest reliability and internal consistency were assessed using intraclass correlation coefficient (ICC2,1) with 95% confidence interval (95% CI) and Cronbach's α coefficient, respectively. The Spearman's rank correlation (rs) was used to assess the correlations between the Persian KPS and SF-36 subscales. Results: The acceptable level of ICC >0.70 (ICC = 0.96, 95% CI = 0.930.98) and Cronbach's α coefficient >0.70 (α = 0.81) was obtained for the Persian KPS. There were low to moderate correlations (rs = 0.250.60, p < .01) between the Persian KPS and Persian SF-36 subscales of mental and physical health components. However, correlations between the Persian KPS and SF-36 physical components were higher than correlations between the Persian KPS and SF-36 mental components. No ceiling and floor effects were seen for the Persian KPS. Conclusions: The Persian version of KPS is a reliable and valid outcome measure of disability and seems to be a suitable instrument for use in clinical practice of Iranian patients with chronic PFPS. Implications for Rehabilitation The results on psychometric properties of the Persian Kujala Patellofemoral Scale are comparable with three validated versions obtained for the Finnish, Turkish and Chinese populations. Persian version of the Kujala Patellofemoral Scale has acceptable reliability/validity and now can be used in clinical and research settings of Iranian patients with chronic patellofemoral pain syndrome. © 2012 Informa UK, Ltd.
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