• Juichi Tonosu, Katsushi Takeshita, Nobuhiro Hara, Ko Matsudaira, So Kato, Kazuhiro Masuda, and Hirotaka Chikuda.
• Department of Orthopedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan. juichitohnosu@yahoo.co.jp
• Eur Spine J. 2012 Aug 1; 21 (8): 159616021596-602.

PurposeThe Oswestry Disability Index (ODI) is one of the most common scoring systems used for patients with low back pain (LBP). Although the normative score of the ODI was reported to be 10.19 in a review article, no study has calculated the normative score after adjusting the value based on the age distribution. In addition, none of the previous studies has estimated the cut-off value which separates LBP with disability from LBP without disability. The purpose of this study was to estimate the normative score by adjusting the data for age distribution in Japan, and to determine the cut-off value which separates LBP with disability from LBP without disability.MethodsWe conducted an internet survey on LBP using the Japanese version of the ODQ. A total of 1,200 respondents, composed of 100 males and 100 females in each age group (from the 20s to 70s), participated in this study. We also asked them to provide information about their backgrounds. We estimated the normative score after correcting for the age distribution of Japan. We also estimated the ODI of those with or without disability, the factors associated with the ODI, and the cut-off value which separates LBP with disability from LBP without disability.ResultsThe participants' backgrounds were similar to the national survey. The normative score of the ODI was estimated at 8.73. The ODI of the LBP with disability group was 22.07. Those with sciatica and obese subjects showed higher ODI than those without. The optimal cut-off value was estimated to be 12.ConclusionsWe defined the normative score and the cut-off value of the ODI.

14 keywords...

hide…