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The Neck Pain and Disability Scale: cross-cultural adaptation into German and evaluation of its psychometric properties in chronic neck pain and C1-2 fusion patients.
Spine (Phila Pa 1976). 2008 Apr 20; 33(9):1018-27.S

Abstract

STUDY DESIGN

Cross-cultural adaptation of an outcome questionnaire.

OBJECTIVE

The aim of the study was to cross-culturally adapt the Neck Pain and Disability Scale (NPAD) for the German language, and to assess its psychometric qualities.

SUMMARY OF BACKGROUND DATA

Neck pain and its associated disability represent an extremely common musculoskeletal problem. Reliable and valid questionnaires for its assessment are available in English, but no German versions of these exist.

METHODS

The English version of the NPAD was translated into German (NPAD-D) and back-translated according to established guidelines. Twenty-three patients with chronic neck pain completed the NPAD-D twice over 1 to 2 weeks, to assess its test-retest reliability. A further 80 patients [40% male, mean (SD) 54 (18) years] completed the questionnaire and underwent a clinical follow-up examination, 1 to 14 years after C1-C2 fusion. These patients also documented their satisfaction with the surgery.

RESULTS

Cronbach's alpha values (internal consistency) for the NPAD-D whole scale and for the NPAD-D subscales pain, disability, and neck-specific function were 0.97, 0.95, 0.97, and 0.87, respectively. The ICC for the test-retest reliability of the NPAD-D was excellent (0.97) and the SEM was relatively low (3.8), giving a "minimal detectable difference" for the scale of 10.5 (scale range is 0-100). The range of motion in rotation, assessed during the clinical examination, correlated significantly with the scores on NPAD-D item 16 (stiffness of neck) (Rho = -0.52, P < 0.0001) and item 17 (trouble turning neck) (Rho = -0.59, P < 0.0001). Range of motion in flexion-extension correlated significantly with the scores on item 18 (trouble looking up and down) (Rho = -0.60, P < 0.0001) and item 19 (trouble working overhead) (Rho = -0.45, P < 0.0001). The NPAD-D scores differed significantly between patients who were satisfied with the result of their operation and those who were not [mean values 36.4 (SD 24.3) and 58.1 (SD 27.4), respectively; P = 0.008].

CONCLUSION

The NPAD-D is a reliable and valid patient-orientated instrument for use in future studies of neck pain and disability in German speaking patients.

Authors+Show Affiliations

Spine Center, Schulthess Klinik, Zürich, Switzerland.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

18427324

Citation

Bremerich, Friedrich H., et al. "The Neck Pain and Disability Scale: Cross-cultural Adaptation Into German and Evaluation of Its Psychometric Properties in Chronic Neck Pain and C1-2 Fusion Patients." Spine, vol. 33, no. 9, 2008, pp. 1018-27.
Bremerich FH, Grob D, Dvorak J, et al. The Neck Pain and Disability Scale: cross-cultural adaptation into German and evaluation of its psychometric properties in chronic neck pain and C1-2 fusion patients. Spine (Phila Pa 1976). 2008;33(9):1018-27.
Bremerich, F. H., Grob, D., Dvorak, J., & Mannion, A. F. (2008). The Neck Pain and Disability Scale: cross-cultural adaptation into German and evaluation of its psychometric properties in chronic neck pain and C1-2 fusion patients. Spine, 33(9), 1018-27. https://doi.org/10.1097/BRS.0b013e31816c9107
Bremerich FH, et al. The Neck Pain and Disability Scale: Cross-cultural Adaptation Into German and Evaluation of Its Psychometric Properties in Chronic Neck Pain and C1-2 Fusion Patients. Spine (Phila Pa 1976). 2008 Apr 20;33(9):1018-27. PubMed PMID: 18427324.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Neck Pain and Disability Scale: cross-cultural adaptation into German and evaluation of its psychometric properties in chronic neck pain and C1-2 fusion patients. AU - Bremerich,Friedrich H, AU - Grob,Dieter, AU - Dvorak,Jiri, AU - Mannion,Anne F, PY - 2008/4/23/pubmed PY - 2008/5/16/medline PY - 2008/4/23/entrez SP - 1018 EP - 27 JF - Spine JO - Spine (Phila Pa 1976) VL - 33 IS - 9 N2 - STUDY DESIGN: Cross-cultural adaptation of an outcome questionnaire. OBJECTIVE: The aim of the study was to cross-culturally adapt the Neck Pain and Disability Scale (NPAD) for the German language, and to assess its psychometric qualities. SUMMARY OF BACKGROUND DATA: Neck pain and its associated disability represent an extremely common musculoskeletal problem. Reliable and valid questionnaires for its assessment are available in English, but no German versions of these exist. METHODS: The English version of the NPAD was translated into German (NPAD-D) and back-translated according to established guidelines. Twenty-three patients with chronic neck pain completed the NPAD-D twice over 1 to 2 weeks, to assess its test-retest reliability. A further 80 patients [40% male, mean (SD) 54 (18) years] completed the questionnaire and underwent a clinical follow-up examination, 1 to 14 years after C1-C2 fusion. These patients also documented their satisfaction with the surgery. RESULTS: Cronbach's alpha values (internal consistency) for the NPAD-D whole scale and for the NPAD-D subscales pain, disability, and neck-specific function were 0.97, 0.95, 0.97, and 0.87, respectively. The ICC for the test-retest reliability of the NPAD-D was excellent (0.97) and the SEM was relatively low (3.8), giving a "minimal detectable difference" for the scale of 10.5 (scale range is 0-100). The range of motion in rotation, assessed during the clinical examination, correlated significantly with the scores on NPAD-D item 16 (stiffness of neck) (Rho = -0.52, P < 0.0001) and item 17 (trouble turning neck) (Rho = -0.59, P < 0.0001). Range of motion in flexion-extension correlated significantly with the scores on item 18 (trouble looking up and down) (Rho = -0.60, P < 0.0001) and item 19 (trouble working overhead) (Rho = -0.45, P < 0.0001). The NPAD-D scores differed significantly between patients who were satisfied with the result of their operation and those who were not [mean values 36.4 (SD 24.3) and 58.1 (SD 27.4), respectively; P = 0.008]. CONCLUSION: The NPAD-D is a reliable and valid patient-orientated instrument for use in future studies of neck pain and disability in German speaking patients. SN - 1528-1159 UR - https://www.unboundmedicine.com/medline/citation/18427324/The_Neck_Pain_and_Disability_Scale:_cross_cultural_adaptation_into_German_and_evaluation_of_its_psychometric_properties_in_chronic_neck_pain_and_C1_2_fusion_patients_ L2 - https://doi.org/10.1097/BRS.0b013e31816c9107 DB - PRIME DP - Unbound Medicine ER -