Background Current clinical guidelines recommend to use both clinical and self-reported measurements for evaluation of chronic neck pain. Among the self-reported outcomes, Neck Disability Index (NDI) and Patient Specific Functional Scale (PSFS) are the most widely used and recommended instruments.1 Although, NDI was validated in Turkish language before, no validation study related to the PSFS was detected in the literature.
Objectives The aims of this study were to translate PSFS in Turkish language and to establish the test-retest reliability and validity of the PSFS-T in chronic neck pain patients.
Methods The PSFS was translated into Turkish by using the “translation-backward translation” method as recommended in the guidelines.2 The demographic information, PSFS-T and NDI were recorded at the first visit of the patients. Thirty patients were called by phone for the retest evaluation of PSFS-T. The construct validity of PSFS-T was determined by investigating the correlation between NDI and PSFS-T scores. The Cronbach's alpha was used for the internal consistency. Intra-class coefficient (ICC) was employed to determine the test-retest reliability.
Results The final form was completed by 42 chronic neck pain patients (18 F) until now. The mean age was 42±14. The internal consistency was found as good (Cronbach's alpha:0.89). A positive moderate correlation was determined between NDI and PSFS-T scores (p<0.05;r=0.405). The ICC for test-retest reliability was determined in high level (ICC: 0.88).
Conclusions The PSFS-T is a reliable and valid instrument for chronic neck pain patients. However,the preliminary results should be confirmed by completing the study.
Childs JD, Cleland JA, Elliott JM, Teyhen DS, Wainner RS, Whitman JM, Sopky BJ, Godges JJ, Flynn TW. Neck pain: Clinical practice guidelines linked to the International Classification of Functioning, Disability, and Health from the Orthopedic Section of the American Physical Therapy Association.JOrthop Sports Phys Ther. 2008;38(9):A1-A34.
Beaton DE, Bombardier C, Guillemin F, Ferraz MB.Guidelines for the process of cross-cultural adaptation of self-report measures. Spine (Phila Pa 1976). 2000;25(24):3186–91.
Disclosure of Interest None declared