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2012, Volume 3, Number 3, Page(s) 091-097
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Measuring Motor, Sensory and Sphincter Dysfunctions in Patients with Cervical Myelopathy Using the Modified Japanese Orthopedic Association (Mjoa) Score: A Validation Study
Parisa Azimi1, Sohrab Shahzadi1, Edward C. Benzel2, Ali Montazari3
1Department of Neurosurgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2Department of Neurosurgery, Cleveland Clinic Foundation, Cleveland, Ohio
3Mental Health Research Group, Health Metrics Research Centre, Iranian Institute for Health Sciences Research, ACECR, Tehran, Iran
Keywords: Cervical myelopathy, The Iranian version of mJOA, Validity

AIM: Cevical sponsylotic myelopathy (CSM) is a common cause of significant clinical morbidity. This study aimed to translate and validate the modified Japanese Orthopedic Association (mJOA) score in Iran.

MATERIAL and METHODS: This was a prospective clinical validation study. Psychometric properties of the questionnaire were assessed using internal consistency, inter-observer reliability, discriminant validity, and responsiveness of the questionnaire to change.

RESULTS: In all, 63 patients were studied. The mean mJOA score was 9.82 (SD = 1.0). Internal consistency of the mJOA as measured by the Cronbach's alpha coefficient was satisfactory (alpha = 0.77). Inter-observer agreement as measured by Kappa statistic also was found to be acceptable (0.75). Known-groups comparison was performed to test discriminant validity. The findings indicated that the mJOA well differentiated between males and females and different age groups as expected (P < 0.0001). Finally the questionnaire was found to be responsive to change (P < 0.0001).

CONCLUSIONS: The Iranian version of mJOA performed well and the findings suggest that it is a reliable and valid measure of motor, sensory and sphincter dysfunctions among CSM patients.

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