摘要
目的根据平均每日步数,建立适用于中国成人的身体活动水平(physical activity level,PAL)预测公式,并验证其预测效果。方法招募800名身体活动不受限制的成年人作为调查对象,排除连续佩戴Actigragh WGT3X-BT型加速度计不满3天者,最终纳入743名研究对象(男性324人,女性419人,平均年龄31.4岁)。获得加速度计所测量的每日步数(steps)、低强度身体活动(light physical activity,LPA)、中等强度身体活动(moderate physical activity,MPA)、高强度身体活动(vigorous physical activity,VPA)的时间和身体活动能量消耗(physical activity energy expenditure,PAEE)。采用简单线性回归模型拟合步数与低中强度的PAL预测公式。采用外部验证的方法,以间接测热法测定的基础代谢率和双标水方法测定的总能量消耗计算得到的PAL作为金标准,利用Bland-Altman分析验证预测公式与标准的一致性,采用正确率验证预测公式准确性。结果预测公式:PAL=1.17+0.000028 steps(R2=0.38,P<0.001)。在外部验证中,预测公式与实际测量得到的PAL差值均数为0.05,95%一致性界限为(-0.26,0.36),正确率为73%,一致性较好。结论基于步数建立的中国成人身体活动水平预测公式性能良好,可应用于中国成人的身体活动管理和肥胖的预防。
OBJECTIVE To develop a prediction equation for estimation physical activity level(PAL)based on the average daily steps in Chinese adults and to verify its prediction power.METHODS A total of 800 adults with no restriction on physical activity were recruited.Excluding those who wore Actigragh WGT3X-BT accelerometer continuously for less than 3 days,743 subjects(324 males,419 females,mean age 31.4 years)were finally included.Daily steps,time of low intensity physical activity(LPA),moderate physical activity(MPA)and vigorous physical activity(VPA)and physical activity energy expenditure(PAEE)were measured by the accelerometer.The method of external validation was adopted.The measured PAL calculated by basal metabolic rate(BMR)measured by indirect thermography(IC)and total energy expenditure(TEE)measured by doubly labeled water method was used as the gold standard.The consistency of the prediction formula was verified by Bland-Altman analysis and the accuracy was verified by the accurate.RESULTS The prediction equation was developed:PAL=1.17+0.000028 Steps.In the external verification,the mean difference was 0.05,the 95%consistency limit was(-0.26,0.36),and the accuracy was 73%,indicating a good consistency.CONCLUSION The prediction formula of PAL for Chinese adults based on the steps has good performance and can be applied to the management of physical activity and the prevention of obesity in Chinese adults.
作者
王小菁
卓勤
毛宏梅
刘婷婷
邱俊强
公维一
Wang Xiaojing;Zhuo Qin;Mao Hongmei;Liu Tingting;Qiu Junqiang;Gong Weiyi(National Institute for Nutrition and Health,Chinese Center for Disease Control and Prevention,Beijing 100050,China;Beijing Sport University,Beijing 100091,China)
出处
《卫生研究》
CAS
CSCD
北大核心
2023年第2期213-218,共6页
Journal of Hygiene Research
基金
国家重点研发计划(No.2018YFC2000601)。
关键词
中国成人
身体活动水平
步数
预测公式
Chinese adults
physical activity level
step counts
prediction equation
