• Yuichi Kasai, Mitsuru Fukui, Kazuhisa Takahashi, Seiji Ohtori, Daisaku Takeuchi, Hiroshi Hashizume, Masahiko Kanamori, Noboru Hosono, Tsukasa Kanchiku, Eiji Wada, Miho Sekiguchi, Shinichi Konno, and Mamoru Kawakami.
• Department of Spinal Surgery and Medical Engineering, Mie University Graduate School of Medicine, Japan. Electronic address: ykasai@clin.medic.mie-u.ac.jp.
• J Orthop Sci. 2017 Jul 1; 22 (4): 665-669.

BackgroundValidity and reliability of the Japanese Orthopaedic Association Back Pain Evaluation Questionnaire (JOABPEQ) had already been verified as the patients' self-rating assessment of low back pain and lumbar spinal disease and, the present study demonstrated the responsiveness of this measure.Methods192 subjects who were determined by medical instructors of the Japanese Society for Spine Surgery and Related Research were analyzed. They had completed a series of treatment and both surveys before and after the treatment. Authors investigated rates of concordance between assessment by physicians and subjective assessment by patients. The mean, standard deviation, minimum, 25th percentile, median, 75th percentile and maximum values for pre-treatment, post-treatment, and acquired points were calculated, and then, we also investigated the trend between subjective assessment by patients and mean acquired points for each JOABPEQ domain and substantial clinical benefit thresholds for the JOABPEQ.ResultsSymptom changes as assessed by physicians did not coincide with those by patients, and acquired points in each JOABPEQ domain were significantly increased with improved self-rating by patients. In addition, patients who rated symptom changes as "slightly improved" showed a mean acquired points of ≥20, and those reporting "improved" showed a 25th percentile points of the acquired points of ≥20 approximately.ConclusionA significant correlation was noted between the self-rating of patients and acquired points JOABPEQ, suggesting that ≥20 acquired points can be interpreted as substantial clinical benefit thresholds for the JOABPEQ.Copyright © 2017 The Authors. Published by Elsevier B.V. All rights reserved.

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