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目的研究老年人群中久坐行为与代谢综合征间的联系。研究设计及方法研究对象为参加2003～2006国家健康及营养普查(NHANES)中的1,367名年龄大于60岁的老年男性及女性。研究对象清醒时的静坐时间由加速度计测定(<100次/分钟)。将静坐时间>5分钟定义为静坐期,静坐行为的中断(≥100次/分)定义为静坐中断。根据ATPⅢ标准定义代谢综合征。结果研究对象平均每天有9.5个小时(占清醒时间的65%)为静坐时间。经年龄校正后,与无代谢综合征者相比,代谢综合征患者静坐时间更长(67.3%vs62.2%),平均静坐期时长更长(17.7vs16.7分钟),静坐时活动强度更低(14.8vs15.8次/分钟),静坐中断更少(82.3vs86.7)(所有P值均小于0.01)。经年龄、性别、种族、教育程度、饮酒情况、吸烟情况、BMI、糖尿病、心脏病情况及体力活动校正后,较高静坐时间百分比及较少静坐中断与代谢综合征患病可能显著相关。静坐期间活动强度与代谢综合征亦相关(但P值为交界性)。结论独立于体力活动,静坐时间所占比例与代谢综合征风险高度相关。目前结果提示通过减少总静坐时间、增加静坐中断次数以避免延长静坐时间可能对老年人有益。
Objective To study the relationship between sedentary behavior and metabolic syndrome in the elderly population. Study Design and Methods Participants were 1,367 older men and women older than 60 years of age from 2003 to 2006 in the National Health and Nutrition Examination Survey (NHANES). Study subjects waking up when the sit-in time by the accelerometer (<100 beats / min). The meditation time> 5 minutes is defined as sitting, meditation behavior interruptions (≥ 100 beats / minute) is defined as meditation interruptions. According to ATP Ⅲ standard definition of metabolic syndrome. Results The study averaged 9.5 hours a day (65% of the awake time) as a sit-in time. After age correction, patients with metabolic syndrome had longer duration of meditation (67.3% vs62.2%), longer mean duration of meditation (17.7 vs16.7 minutes), more activity during sitting Low (14.8 vs 15.8 beats / min), with fewer sit-in interruptions (82.3 vs 86.7) (all P values less than 0.01). After correction for age, gender, ethnicity, education, alcohol consumption, smoking status, BMI, diabetes, heart disease and physical activity, higher percentage of meditation time and fewer meditation disruptions may be significantly associated with the prevalence of metabolic syndrome. Activity intensity during sit-in was also associated with metabolic syndrome (but P values were borderline). Conclusion Independent of physical activity, the proportion of sit-in time is highly correlated with the risk of metabolic syndrome. The current results suggest that it may be beneficial for the elderly to reduce the total sit-in time and increase the number of sit-in interruptions to avoid prolonged sit-in time.