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Measurement properties of the Brazilian version of the Copenhagen Neck Functional Disability Scale in patients with chronic neck pain

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Abstract

Objective

To evaluate the measurement properties of the Brazilian version of the Copenhagen Neck Functional Disability Scale (CNFDS) in patients with chronic neck pain.

Methods

One hundred and five patients were included in the study. The structural validity of the CNFDS was assessed by exploratory and confirmatory factor analysis with the following fit indices: chi-square divided by degrees of freedom (chi-square/df), root mean square error of approximation (RMSEA), comparative fit index (CFI), and Tucker-Lewis index (TLI). To test the construct validity, the CNFDS score was correlated with the Numerical Pain Rating Scale, the Tampa Scale of Kinesiophobia, the Pain-Related Catastrophizing Thoughts Scale, and Neck Disability Index (NDI). A subsample of 43 patients filled the CNFDS at two different times, and test–retest reliability was measured using the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimum detectable change (MDC). The internal consistency of the CNFDS was analyzed by Cronbach's alpha.

Results

CNFDS presented a unidimensional structure, with goodness of fit indices: chi-square/df = 1.37, CFI = 0.94, TLI = 0.93, RMSEA = 0.059. The CNFDS showed satisfactory results of reliability (ICC = 0.93) and internal consistency (Cronbach's alpha = 0.84). The SEM was 1.72 and the MDC was 4.76. The CNFDS showed a high correlation with the NDI (rho = 0.718) and a low correlation with the other instruments. There were no floor and ceiling effects.

Conclusion

The Brazilian version of the CNFDS with a one-dimensional structure and 15 items has adequate measurement properties.

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Funding

This work was partially supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), finance code 001. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Author information

Authors and Affiliations

  1. Postgraduate Program in Physical Education, Universidade Federal do Maranhão, São Luís, MA, Brazil

    Felipe Souza Barreto & Almir Vieira Dibai-Filho

  2. Rede Sarah de Hospitais de Reabilitação, São Luís, MA, Brazil

    Felipe Souza Barreto

  3. Postgraduate Program in Adult Health, Universidade Federal do Maranhão, São Luís, MA, Brazil

    André Pontes-Silva & Almir Vieira Dibai-Filho

  4. Department of Health Residencies, Empresa Maranhense de Serviços Hospitalares, São Luís, MA, Brazil

    Fernanda Lima Britto Oliveira

  5. Departament of Physical Education, Universidade Federal do Maranhão, São Luís, MA, Brazil

    Flavio de Oliveira Pires

  6. Postgraduate Program in Programs Management and Health Services, Universidade Ceuma, São Luís, MA, Brazil

    Daniela Bassi-Dibai

  7. Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho, São Paulo, SP, Brazil

    Cid André Fidelis-de-Paula-Gomes

  8. Avenida dos Portugueses, 1966, Programa de Pós-Graduação em Saúde do Adulto, Centro de Ciências Biológicas e da Saúde, Universidade Federal do Maranhão, Vila Bacanga, São Luís, MA, 65080-805, Brazil

    André Pontes-Silva

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  1. Felipe Souza Barreto
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  3. Fernanda Lima Britto Oliveira
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Contributions

Data collect: FSB; Data analysis: FSB and AVDB; Design: all authors; Manuscript writing: all authors; Final approval of manuscript: all authors.

Corresponding author

Correspondence to André Pontes-Silva.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Barreto, F.S., Pontes-Silva, A., Oliveira, F.L.B. et al. Measurement properties of the Brazilian version of the Copenhagen Neck Functional Disability Scale in patients with chronic neck pain. Eur Spine J 31, 346–352 (2022). https://doi.org/10.1007/s00586-021-07070-1

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