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Cultural adaptation and validation of the Persian version of the Disabilities of the Arm, Shoulder and Hand (DASH) outcome measure

Department of Physical Therapy, Faculty of Rehabilitation Sciences, Tehran University of Medical Sciences, jmousavi{at}razi.tums.ac.ir

Mohamad Parnianpour

Department of Mechanical Engineering, Sharif University of Technology, Tehran

Mohsen Abedi

Physical Therapy Clinic, Milad Hospital, Tehran

Ahmadreza Askary-Ashtiani

Faculty of Paramedical Sciences, Zahedan University of Medical Sciences, Zahedan

Abdolkarim Karimi

Musculoskeletal Research Center, Faculty of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan

Aliakbar Khorsandi

Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran

Hossein Mehdian

Centre for Spinal Studies and Surgery, Nottingham University Hospitals, Nottingham, UK

Objective: To translate and validate the Persian version of the Disabilities of the Arm, Shoulder and Hand (DASH) outcome measure (Persian DASH).

Design: Cultural translation and psychometric testing.

Setting: Outpatient departments of orthopaedics surgery, primary care settings, rehabilitation medicine and physical therapy.

Subjects: Two hundred and seventy-one consecutive Persian-speaking patients with upper extremity disorders including subacromial impingement syndrome, rotator cuff disease, epicondylitis, ulnar nerve entrapment, bursitis, instability, carpal tunnel syndrome, tenosynovitis and adhesive capsulitis.

Methods: The translation and cultural adaptation of the original questionnaire was carried out in accordance with published guidelines. The participants were asked to complete a questionnaire booklet including the Persian DASH, the Short Form General Health Survey (SF-36) and a visual analogue scale (VAS) of pain. In addition, 31 randomly selected patients were asked to complete the questionnaire 48 hours later for the second time.

Results: Cronbach's alpha coefficient for the Persian DASH was 0.96. The Persian DASH showed excellent test—retest reliability with intraclass correlation coefficient equal to 0.82 (P<0.01). The correlation between the Persian DASH and the functional scales of the Iranian SF-36 showed desirable results indicating a good convergent validity (Pearson's coefficients ranged from -0.25 to -0.72; P<0.001). The correlation between the Persian DASH and the visual analogue scale was 0.52 (P<0.01).

Conclusions: The Persian DASH is a reliable and valid instrument to measure functional status in Persian-speaking patients with upper extremity disorders in Iran. It is simple and easy to use and now can be applied in clinical settings and future outcome studies in Iran and other Persian-speaking communities.

Clinical Rehabilitation, Vol. 22, No. 8, 749-757 (2008)
DOI: 10.1177/0269215508085821


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