Tanishima Shinji, Hagino Hiroshi, Matsumoto Hiromi, Tanimura Chika, Nagashima Hideki
Department of Orthopedic Surgery,Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan.
School of Health Science, Tottori University Faculty of Medicine, 86 Nishi-cho, Yonago, Tottori, 683-8503, Japan.
BMC Musculoskelet Disord. 2017 Nov 15;18(1):452. doi: 10.1186/s12891-017-1807-7.
Low back pain (LBP) is one of the most common ailments that people experience in their lifetime. On the other hands, Sarcopenia also leads to several physical symptoms and contributes to reducing the quality of life of elderly people.The purpose of this study is to investigate the association between sarcopenia and low back pain among the general population.
The subjects included 216 adults (79 men and 137 women; mean age, 73.5 years) undergoing a general medical examination in Hino, Japan. Skeletal muscle index (SMI), The percentage of young adults' mean (%YAM) of the calcaneal bone mass using with quantitative ultrasound (QUS) method and walking speed were measured, and subjects who met the criteria of the Asian Working Group for Sarcopenia were assigned to the sarcopenia group. Subjects with decreased muscle mass only were assigned to the pre-sarcopenia group, and all other subjects were assigned to the normal group. Then, we compared the correlations with low back pain physical finding. The Oswestry Disability Index (ODI) and the low back pain visual analogue scale (VAS) were used as indices of low back pain. Statistical analysis was performed among three groups with respect their characteristic, demographics, data of sarcopenia determining factor, VAS and ODI. We also analysed prevalence of LBP and sarcopenia. We investigated the correlations between ODI and the sarcopenia-determining factors of walking speed, muscle mass and grip strength.
Sarcopenia was noted in 12 subjects (5.5%). The pre-sarcopenia group included 38 subjects (17.6%), and the normal group included 166 subjects (76.9%). The mean ODI score was significantly higher in the sarcopenia group (25.2% ± 12.3%; P < 0.05) than in the pre-sarcopenia group (11.2% ± 10.0%) and the normal group (11.9% ± 12.3%). %YAM and BMI were significantly lower in the sarcopenia group than in other groups (P < 0.05). A negative correlation existed between walking speed and ODI (r = -0.32, P < 0.001).
The results of this study suggested that decreased physical ability due to quality of life in residents with LBP may be related to sarcopenia.
腰痛（LBP）是人们一生中最常见的疾病之一。另一方面，肌肉减少症也会导致多种身体症状，并影响老年人的生活质量。本研究旨在调查普通人群中肌肉减少症与腰痛之间的关联。
研究对象包括在日本日野市接受普通体检的216名成年人（79名男性和137名女性；平均年龄73.5岁）。测量骨骼肌指数（SMI）、使用定量超声（QUS）方法测量的跟骨骨量相对于年轻成年人平均值的百分比（%YAM）以及步行速度，符合亚洲肌肉减少症工作组标准的受试者被分配到肌肉减少症组。仅肌肉量减少的受试者被分配到肌肉减少症前期组，所有其他受试者被分配到正常组。然后，我们比较了与腰痛体格检查结果的相关性。采用Oswestry功能障碍指数（ODI）和腰痛视觉模拟量表（VAS）作为腰痛指标。对三组受试者的特征、人口统计学、肌肉减少症决定因素数据、VAS和ODI进行了统计分析。我们还分析了腰痛和肌肉减少症的患病率。我们研究了ODI与步行速度、肌肉量和握力等肌肉减少症决定因素之间的相关性。
12名受试者（5.5%）被诊断为肌肉减少症。肌肉减少症前期组包括38名受试者（17.6%），正常组包括166名受试者（76.9%）。肌肉减少症组的平均ODI评分（25.2%±12.3%；P<0.05）显著高于肌肉减少症前期组（11.2%±10.0%）和正常组（11.9%±12.3%）。肌肉减少症组的%YAM和BMI显著低于其他组（P<0.05）。步行速度与ODI之间存在负相关（r=-0.32，P<0.001）。
本研究结果表明，腰痛患者因生活质量导致的身体能力下降可能与肌肉减少症有关。
