Simple standard equation for daily step count in Japanese patients with chronic obstructive pulmonary disease
Simple standard equation for daily step count in Japanese patients with chronic obstructive pulmonary disease
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DOI：
10.2147/copd.s218705
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发表时间：
2019-01-01
影响因子：
2.8
通讯作者：
Yamamoto, Nobuyuki
中科院分区：
文献类型：
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作者：
Nakanishi, Masanori;Minakata, Yoshiaki;Yamamoto, Nobuyuki
目的：改善COPD患者的体力活动是一个重要问题。然而，COPD患者的推荐步数还没有确定标准。我们进行了一项回溯性的观察性研究，以建立一个简单的标准方程来计算每天的步数，从而更容易确定每个受试者是否达到了他/她的预测值。患者和方法：从日本的5个研究所招募了使用三轴加速度计测量身体活动超过2周的COPD患者。多变量回归分析检测与步数相关的因素。结果：入选患者162例，年龄72.3岁(7.2岁)，FEV1%pred 5 9.2%(2 2.8%)。采用逐步回归法检测年龄、MMRC呼吸困难分级和吸气量(IC)。所创建的标准方程为“Step Count=(-0.079x[age]-1.595x[mMRC]+2.078x[IC]+18.149)(3)”.观察了计算值和实测值之间的相关性，并观察到它们之间的固定和成比例的偏差。当患者患有
Purpose: The improvement of physical activity in patients with COPD is an important issue. However, no standard for the recommended number of steps for patients with COPD has been determined. We conducted a retrospective observational study to create a simple standard equation for the daily step count, which makes it easier to determine whether each subject is attaining his/her predicted value or not.Patients and methods: Stable outpatients diagnosed with COPD whose physical activities had been measured using a triaxial accelerometer for more than 2 weeks were recruited from 5 institutes in Japan. Factors associated with the step count were detected by multivariate regression analysis. After the data were transformed to a normalized distribution, a multivariate linear regression equation was created using stepwise regression.Results: One hundred sixty-two patients aged 72.3 (7.2) years and of FEV1 %pred 59.2 (22.8) % were recruited. Among the parameters, age, mMRC dyspnea scale and inspiratory capacity (IC) were detected by the stepwise method. The created standard equation was "Step count = (-0.079x[age]-1.595x[mMRC]+2.078x[IC]+18.149)(3)". The correlations between the calculated values and the measured values were observed, and fixed, and proportional biases between them were also observed. When patients with