Outcome Measures of Functionality, Social Interaction, and Pain in Patients with Cervical Spondylotic Myelopathy: A Validation Study for the Iranian Version of the Copenhagen Neck Functional Disability Scale.
- Author:
Hossein NAYEB AGHAEI
1
;
Parisa AZIMI
;
Sohrab SHAHZADI
;
Shirzad AZHARI
;
Hassan Reza MOHAMMADI
;
Pooyan ALIZADEH
;
Ali MONTAZERI
Author Information
- Publication Type:Original Article
- Keywords: Validity; Copenhagen Neck Functional Disability Scale; Cervical spondylotic myelopathy; Iran
- MeSH: Asian Continental Ancestry Group; Follow-Up Studies; Humans; Interpersonal Relations*; Iran; Neck*; Orthopedics; Outcome Assessment (Health Care)*; Psychometrics; Spinal Cord Diseases*
- From:Asian Spine Journal 2015;9(6):901-908
- CountryRepublic of Korea
- Language:English
- Abstract: STUDY DESIGN: Cross-sectional. PURPOSE: To translate and validate the Iranian version of the Copenhagen Neck Functional Disability Scale (CNFDS). OVERVIEW OF LITERATURE: Instruments measuring patient-reported outcomes should satisfy certain psychometric properties. METHODS: Ninety-three cases of cervical spondylotic myelopathy were entered into the study and completed the CNFDS pre and postoperatively at the 6 month follow-up. The modified Japanese Orthopedic Association Score was also completed. The internal consistency, test-retest, convergent validity, construct validity (item scale correlation), and responsiveness to change were assessed. RESULTS: Mean age of the patients was 54.3 years (standard deviation, 8.9). The Cronbach alpha coefficient was satisfactory (alpha=0.84). Test-retest reliability as assessed by the intraclass correlation coefficient analysis was 0.95 (95% confidence interval, 0.92-0.98). The modified Japanese Orthopedic Association score correlated strongly with the CNFDS score, lending support to its good convergent validity (r=-0.80; p<0.001). Additionally, the correlation of each item with its hypothesized domain on the CNFDS was acceptable, suggesting that the items had a substantial relationship with their own domains. These results also indicate that the instrument was responsive to change (p<0.0001). CONCLUSIONS: The findings suggest that the Iranian version of the CNFDS is a valid measure to assess functionality, social interaction, and pain among patients with cervical spondylotic myelopathy.
