Yamada Takuya, Fukuda Yoshiharu, Sato Shinichiro, Maruo Kazushi, Nakamura Mutsumi, Nemoto Yuta, Takeda Noriko, Sawada Susumu, Kitabatake Yoshinori, Arao Takashi
Teikyo University Graduate School of Public Health.
Faculty of Health Sciences, University of Human Arts and Sciences.
Nihon Koshu Eisei Zasshi. 2021 Jun 3;68(5):331-338. doi: 10.11236/jph.20-087. Epub 2021 Mar 5.
Objectives The aim of this study was to examine the effect of an exercise program targeting knee pain on longitudinal medical costs (MC) of elderly community-dwelling adults.Methods A community-based health program using specific exercises for improving knee pain was held from January to February, 2015. Twenty-eight individuals participated in the program (intervention group) and seventy individuals were selected from the respondents of a health and lifestyle survey by matching age, sex, and baseline value of severity of knee pain as a control group. Twenty individuals from the intervention group and twenty-nine from the control group were included in the final analysis. The changes in MC from 2014 to 2018 were compared between the two groups using a linear mixed-effects model.Results The effect of the program on MC, estimated as a change from the baseline in 2014, showed a reduction of -5.6×10 yen/person (95% CI: -39.2-28.0) for the entire four-year period after the intervention. However, this difference was not significant. The changes in MC each year after the intervention were 9.3×10 yen/person (95% CI: -39.6-58.3) in 2015, -2.0×10 yen/person (95% CI: -44.4-40.5) in 2016, -10.3×10 yen/person (95% CI: -42.5-21.9) in 2017, and 8.2×10 yen/person (95% CI: -39.1-55.4) in 2018.Conclusion The exercise program did not show a clear benefit in reducing the MC of elderly community-dwellers during the four years after the intervention. Further research with longer study durations and larger sample populations would be necessary to determine the effect of such intervention programs on MC.
目的 本研究旨在探讨一项针对膝关节疼痛的运动计划对社区居住老年成年人纵向医疗费用（MC）的影响。
方法 2015年1月至2月举办了一项基于社区的健康计划，采用特定运动来改善膝关节疼痛。28人参加了该计划（干预组），并从健康与生活方式调查的受访者中按年龄、性别和膝关节疼痛严重程度的基线值匹配选出70人作为对照组。最终分析纳入了干预组的20人和对照组的29人。使用线性混合效应模型比较两组2014年至2018年MC的变化。
结果 该计划对MC的影响，以相对于2014年基线的变化来估计，显示干预后的整个四年期间每人减少了-5.6×10日元（95%CI：-39.2 - 28.0）。然而，这种差异并不显著。干预后每年的MC变化分别为：2015年每人9.3×10日元（95%CI：-39.6 - 58.3），2016年每人-2.0×10日元（95%CI：-44.4 - 40.5），2017年每人-10.3×10日元（95%CI：-42.5 - 21.9），2018年每人8.2×10日元（95%CI：-39.1 - 55.4）。
结论 该运动计划在干预后的四年中，在降低社区居住老年人的MC方面未显示出明显益处。需要进行更长研究周期和更大样本量的进一步研究，以确定此类干预计划对MC的影响。
