Psychometric properties of a German version of the neck pain and disability scale

2008 | journal article; research paper. A publication with affiliation to the University of Göttingen.

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​Scherer M, Blozik E, Himmel W, Laptinskaya D, Kochen MM, Herrmann-Lingen C. ​Psychometric properties of a German version of the neck pain and disability scale​. ​​European Spine Journal. ​2008;​17​(7):​​922​-929​. ​doi:10.1007/s00586-008-0677-y. 

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Scherer, Martin; Blozik, Eva; Himmel, Wolfgang ; Laptinskaya, Daria; Kochen, Michael M. ; Herrmann-Lingen, Christoph
The aim of this study is to evaluate the validity and the psychometric properties of a German version of the 20-item neck pain and disability scale (NPAD) for use in primary care settings. Four hundred and forty-eight participants from 15 general practices in the area of Gottingen Germany completed a multidimensional questionnaire including a newly developed German version of the NPAD (NPAD-d) and self-reported demographic and clinical information. Reliability was tested using Cronbach's alpha. Item-to-total score correlations were analysed. Factor structure was explored by using unrestricted principal factor analysis. Construct validity of the NPAD-d was evaluated by simple correlation analyses (Pearson's rho) with social and clinical characteristics. The discriminative abilities of the NPAD-d were examined by comparing differences between subgroups stratified on non-NPAD-d pain related characteristics using t tests for mean scores. Cronbach's alpha of NPAD-d was 0.94. Item-to-total scale correlations ranged between 0.414 and 0.829. Exploratory principal factor analysis indicated that the NPAD-d covers one factor with an explained variance of 48%. Correlation analysis showed high correlations with criterion variables. The NAPD-d scores of subgroups of patients were significantly different showing good discriminative validity of the scale. The NPAD-d demonstrated good validity and reliability in this general practice setting. The NPAD-d may be useful in the clinical assessment process and the management of neck pain.
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European Spine Journal 
Institut für Allgemeinmedizin 



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