Document Detail

Reliability, validity, and responsiveness of the Japanese version of the Neck Pain and Disability Scale.
MedLine Citation:
PMID:  21691739     Owner:  NLM     Status:  Publisher    
BACKGROUND: Until recently, no Japanese versions have existed of the more popular, patient-reported disability questionnaires for neck pain. This study aimed to test the reliability, validity, and responsiveness of the Japanese version of the Neck Pain and Disability Scale (NPDS), one of the most widely used questionnaires in patients with neck pain. METHODS: In this validation study, 167 outpatients with neck pain participated. Patients received the NPDS and the Medical Outcome Study Short Form 36-item Health Survey (SF-36), and used Visual Analog Scales (VASs) to assess pain and global health. To examine test-retest reliability, patients who were considered stable by clinicians were given the NPDS 2 weeks after baseline. To examine responsiveness, patients who had not undergone treatment at the time of the first data collection or had no change in treatment over 3 months were studied again 2 weeks after starting a new medication or physical therapy. RESULTS: Of the 167 participants, 143 completed the questionnaires (85.6%). Factor analysis showed two factors, defined as neck-pain-related disability (factor 1) and neck-related pain (factor 2). Cronbach's α coefficient for factor 1, factor 2, and total score was 0.94, 0.93, and 0.96. The intra-class correlation coefficients for the 19 more stable patients were 0.79, 0.88, and 0.87. For concurrent validity, the correlation between NPDS subscales and total score and SF-36 subscale scores ranged from r = -0.54 to -0.22 (p < 0.01). Correlations between the NPDS subscales and total score and VAS of pain ranged from 0.56 to 0.77 (p < 0.01) and those for VAS of global health ranged from 0.48 to 0.63 (p < 0.01). The NPDS subscales and total scores of the 41 patients retested after treatment were significantly improved. CONCLUSIONS: The Japanese version of the NPDS is a useful scale with reliability, validity, and responsiveness in assessing patients suffering from neck pain.
Rei Ono; Koji Otani; Misa Takegami; Yoshimi Suzukamo; Paula Goolkasian; Anthony H Wheeler; Shin-Ichi Konno; Shin-Ichi Kikuchi; Shunichi Fukuhara
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-21
Journal Detail:
Title:  Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association     Volume:  -     ISSN:  1436-2023     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9604934     Medline TA:  J Orthop Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Community Health Sciences, Kobe University Graduate school of Health Sciences, 7-10-2 Tomogaoka, Suma, Kobe, Hyogo, 654-0142, Japan,
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