Abstract
Purpose
To transculturally adapt the Neck Disability Index to Mexican Spanish (NDI-Mx) and to evaluate its psychometric properties.
Methods
Translation and transcultural adaptation of the NDI were conducted according to published guidelines. The test–retest reliability of the NDI-Mx was assessed with intraclass correlation coefficient (ICC3,1), the student t-test, standard error of measurement, minimal detectable change and Bland–Altman plot. Cronbach’s α coefficient was used to evaluate internal consistency. Floor and ceiling effects were also evaluated. Convergent validity was assessed by comparison of the NDI-Mx with the Northwick Park Neck Pain Questionnaire (NPQ) through the Spearman correlation coefficient. Finally, a confirmatory factor analysis (CFA) was conducted.
Results
The sample was composed of 113 subjects (38 men and 75 women) with a mean age of 30 (SD, 12.19) years. All items of the NDI-Mx showed good test–retest reliability (ICC3,1 = 0.86) and good internal consistency (Cronbach’s α = 0.85). Floor and ceiling effects were not observed. There was good convergent validity with a high correlation between NDI-Mx and NPQ (ρ = 0.83). The CFA revealed that a one-factor solution fitted adequately the data (χ2(32) = 41.18, p = .13).
Conclusion
The NDI-Mx seems to be a valid and reliable tool that can be used in clinical practice and research on Mexican populations with neck pain.
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M.S.R and A.A.L contributed to the design and implementation of the study and to the writing of the first draft and to the revision of the final manuscript. D.P.M contributed to the coordination of the study, to the writing of the first draft and to the revision the final manuscript. R.F.M and T.G.I contributed to data curation and statistical analysis and to the writing of the first draft and to the revision of the final manuscript.
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Santiago-Reynoso, G.M., Alvarado-Luna, A.E., Fernandez-Matias, R. et al. Transcultural adaptation of the neck disability index to mexican spanish and assessment of its psychometric properties. Eur Spine J 30, 2654–2660 (2021). https://doi.org/10.1007/s00586-021-06835-y
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DOI: https://doi.org/10.1007/s00586-021-06835-y