Investigation of validity of model for estimating shear force applied to buttocks in elderly people with kyphosis while sitting comfortably on a chair
Investigation of validity of model for estimating shear force applied to buttocks in elderly people with kyphosis while sitting comfortably on a chair
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DOI：
10.3109/17483107.2010.522683
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发表时间：
2011-01-01
影响因子：
2.2
通讯作者：
Nishimoto, Tetsuya
中科院分区：
文献类型：
--
作者：
Kobara, Kenichi;Shinkoda, Koichi;Nishimoto, Tetsuya
目的.本研究的目的是调查模型的有效性，估计剪切力的老年人与后凸。脊柱后凸的受试者是在为老年人提供医疗保健服务的机构中的10名老年人。使用测力板测量剪切力，同时测量上半身的合成质心的位置和躯干的倾斜角。通过将这些值代入模型计算估计的剪切力。测得的剪切力平均值为8.4 SD 1.4 [% BW]，估计的剪切力平均值为5.8 SD 1.0 [% BW]。虽然这两个值之间存在显著差异（p < 0.01），但它们之间存在很强的正相关（r = 0.786，p < 0.01）。两者之间的回归直线为y = 1.097x + 1.96，其中x为估计值，y为实测值。这些结果表明，估计的剪切力接近于测量的剪切力，因此通过将计算值代入线性回归近似已知。
Purpose. The purpose of the present study was to investigate the validity of a model for estimating shear force on the buttocks of elderly people with kyphosis.Method. The subjects with kyphosis were 10 elderly people in a facility providing health care services for the elderly. The shear force was measured using a force plate and, simultaneously, the position of the resultant centre of mass of the upper body and the inclination angle of the trunk were measured. The estimated shear force was calculated by substituting these values in the model.Results. The average value of the measured shear force was 8.4 SD 1.4 [% BW], and the average value of the estimated shear force was 5.8 SD 1.0 [% BW]. Although there was a significant difference between these two values (p < 0.01), there was a strong positive correlation between them (r = 0.786, p < 0.01). The regression line between the two values was y = 1.097x + 1.96, where x = estimated value, y = measured value.Conclusions. These results suggest that the estimated shear force was close to the measured shear force and thus is approximately known by substituting the calculated values for the linear regression.