Patients and methods: Between June 2014 and July 2015, a total of 97 patients with neck pain (27 males, 70 females; mean age 46.6±10.6 years; range, 18 to 65 years) were included in the study. The patients underwent a physical therapy and rehabilitation program. For translation, the American Association of Orthopedic Surgeons guideline was used. The reliability was measured with internal consistency and test-retest by calculation of the Cronbach alpha and intraclass correlation coefficient (ICC) respectively. Internal construct validity of the BQc-t was analyzed with confirmatory factor analysis. For external construct validity, the correlations between the BQc-t results and the Neck Pain and Disability Scale (NPAD), Modified Neck Disability Index (MNDI), and Short Form-36 (SF-36) were analyzed before and after treatment. Responsiveness was calculated as the effect size (ES) and standardized response mean (SRM). Minimal detectable change (MDC) score was calculated to evaluate interpretability.

Results: The ICC value for test-retest of total score was 0.945. Pre- and post-treatment Cronbach alpha coefficients were 0.877 and 0.907, respectively, showing that the reliability of the BQc-t was considerably high. Confirmatory factor analysis showed that questions were found to cluster in a single dimension. In terms of the external construct validity, there was a positive statistically significant correlation between the BQc-t questions, except for Question 7, and relevant subscales of the NPAD and MNDI. There was also a negative statistically significant correlation between the BQc-t questions and SF-36 subgroups. The ES and SRM were 1.23 and 1.48, respectively. The MDC was 20.31.

Conclusion: Our study results show that the BQc-t is reliable, valid, and sensitive to clinical changes. Keywords : Neck Bournemouth Questionnaire, neck pain, questionnaire, reliability, translation, validity