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

다국어 초록 (Multilingual 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 α coefficient was satisfactory (α=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.

참고문헌 (Reference)

1 Dadasberv VY, "Youmans neurological surgery" W.B. Saunders 2859-2868, 2011

2 Prolo DJ, "Toward uniformity in evaluating results of lumbar spine operations: a paradigm applied to posterior lumbar interbody fusions" 11 : 601-606, 1986

3 Westaway MD, "The patient-specific functional scale: validation of its use in persons with neck dysfunction" 27 : 331-338, 1998

4 Nurick S, "The pathogenesis of the spinal cord disorder associated with cervical spondylosis" 95 : 87-100, 1972

5 Nurick S, "The natural history and the results of surgical treatment of the spinal cord disorder associated with cervical spondylosis" 95 : 101-108, 1972

6 Yapali G, "The cross-cultural adaptation, reliability, and validity of the Copenhagen Neck Functional Disability Scale in patients with chronic neck pain: Turkish version study" 37 : E678-E682, 2012

7 Leak AM, "The Northwick Park Neck Pain Questionnaire, devised to measure neck pain and disability" 33 : 469-474, 1994

8 Vernon H, "The Neck Disability Index: state-of-theart, 1991-2008" 31 : 491-502, 2008

9 Jordan A, "The Copenhagen Neck Functional Disability Scale: a study of reliability and validity" 21 : 520-527, 1998

10 Bolton JE, "The Bournemouth Questionnaire: a short-form comprehensive outcome measure. II. Psychometric properties in neck pain patients" 25 : 141-148, 2002

11 Nunnally JC, "Psychometric theory" McGraw-Hill 1994

12 Azimi P, "Measuring motor, sensory and sphincter dysfunctions in patients with cervical myelopathy using the modified Japanese Orthopedic Association (mJOA) score: a Validation Study" 3 : 91-97, 2012

13 Beaton DE, "Guidelines for the process of cross-cultural adaptation of self-report measures" 25 : 3186-3191, 2000

14 Forestier R, "French version of the Copenhagen neck functional disability scale" 74 : 155-159, 2007

15 Wheeler AH, "Development of the Neck Pain and Disability Scale: item analysis, face, and criterion-related validity" 24 : 1290-1294, 1999

16 Misterska E, "Cross-cultural adaptation of the Neck Disability Index and Copenhagen Neck Functional Disability Scale for patients with neck pain due to degenerative and discopathic disorders: psychometric properties of the Polish versions" 12 : 84-, 2011

17 Guillemin F, "Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines" 46 : 1417-1432, 1993

18 Ferraz MB, "Cross cultural adaptation of questionnaires: what is it and when should it be performed?" 24 : 2066-2068, 1997

19 Chiles BW 3rd, "Cervical spondylotic myelopathy: patterns of neurological deficit and recovery after anterior cervical decompression" 44 : 762-769, 1999

20 Binder AI, "Cervical spondylosis and neck pain" 334 : 527-531, 2007

21 Benzel EC, "Cervical laminectomy and dentate ligament section for cervical spondylotic myelopathy" 4 : 286-295, 1991

22 Azimi P, "An outcome measure of functionality and quality of life in patients with cervical myelopathy" 16 : e8102-, 2014

23 Azimi P, "An outcome measure of functionality and pain in patients with lumbar disc herniation: a validation study of the Japanese Orthopedic Association (JOA) score" 17 : 341-345, 2012

24 Traynelis VC, "Alternative procedures for the treatment of cervical spondylotic myelopathy: arthroplasty, oblique corpectomy, skip laminectomy: evaluation of comparative effectiveness and safety" 38 : S210-S231, 2013

25 Herdmann J, "Advances in neurosurgery" Springer 266-268, 1994

26 Tetreault LA, "A clinical prediction model to determine outcomes in patients with cervical spondylotic myelopathy undergoing surgical treatment: data from the prospective, multicenter AOSpine North America study" 95 : 1659-1666, 2013