Koji Nakamaru1,2, Junya Aizawa3, Takayuki Koyama4, Osamu Nitta5. 1. Department of Rehabilitation Medicine, Terashima Orthopaedic Clinic, 3-33-10 Nishiooizumi Nerima-ku, Tokyo, 178-0065, Japan. koji.nakamaru@nifty.com. 2. Graduate School of Human Health Science, Tokyo Metropolitan University, Tokyo, Japan. koji.nakamaru@nifty.com. 3. Athletic Rehabilitation Section, Clinical Center for Sports Medicine and Sports Dentistry Sports Science Organization, Tokyo Medical and Dental University, Tokyo, Japan. 4. Department of Physical Education, Nihon University, Tokyo, Japan. 5. Graduate School of Human Health Science, Tokyo Metropolitan University, Tokyo, Japan.
Abstract
PURPOSE: The aims of this study were to translate and culturally adapt the Patient-Specific Functional Scale (PSFS) and validate the Japanese version of the PSFS (PSFS-J) in outpatients with neck pain. METHODS: The PSFS was translated and adapted into Japanese in accordance with the published guidelines. A total of 103 outpatients with neck pain were recruited for this study. Psychometric evaluation included test-retest reliability, convergent validity by comparing the PSFS-J to the Neck Disability Index (NDI), patient's global impression of change (PGIC), and responsiveness (unpaired t test, minimal detectable change). RESULTS: The intraclass correlation coefficient for test-retest reliability was 0.98 (95% confidence interval = 0.95-0.99). The Pearson correlation coefficient with the NDI was -0.35. The Spearman correlation coefficient showed a strong relationship between the change score in the PSFS-J and PGIC (-0.70). The analysis of responsiveness was calculated with the unpaired t test showing a significant difference between the stable and improved patients (P < 0.01). The minimal detectable change was calculated as 0.64. CONCLUSIONS: The Japanese version of the PSFS is a valid, reliable, and responsive instrument to assess Japanese outpatients with neck pain.
PURPOSE: The aims of this study were to translate and culturally adapt the Patient-Specific Functional Scale (PSFS) and validate the Japanese version of the PSFS (PSFS-J) in outpatients with neck pain. METHODS: The PSFS was translated and adapted into Japanese in accordance with the published guidelines. A total of 103 outpatients with neck pain were recruited for this study. Psychometric evaluation included test-retest reliability, convergent validity by comparing the PSFS-J to the Neck Disability Index (NDI), patient's global impression of change (PGIC), and responsiveness (unpaired t test, minimal detectable change). RESULTS: The intraclass correlation coefficient for test-retest reliability was 0.98 (95% confidence interval = 0.95-0.99). The Pearson correlation coefficient with the NDI was -0.35. The Spearman correlation coefficient showed a strong relationship between the change score in the PSFS-J and PGIC (-0.70). The analysis of responsiveness was calculated with the unpaired t test showing a significant difference between the stable and improved patients (P < 0.01). The minimal detectable change was calculated as 0.64. CONCLUSIONS: The Japanese version of the PSFS is a valid, reliable, and responsive instrument to assess Japanese outpatients with neck pain.
Entities:
Keywords:
Cultural adaptation; Neck pain; Psychometric testing; The Patient-Specific Functional Scale
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