Martinez-Gomez David, Guallar-Castillon Pilar, Rodríguez-Artalejo Fernando
Department of Physical Education, Sport and Human Movement, Faculty of Teacher Training and Education, Universidad Autónoma de Madrid, Madrid, Spain.
Department of Preventive Medicine and Public Health, School of Medicine, Universidad Autónoma de Madrid, Madrid, Spain; IdiPaz and CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain.
J Am Med Dir Assoc. 2016 Oct 1;17(10):960.e15-20. doi: 10.1016/j.jamda.2016.07.016. Epub 2016 Aug 31.
The progressive aging of the population has increased the number of older adults with disabilities. Regular physical activity has shown to improve health among these individuals, but the effects of sedentary behavior are mostly unknown. Thus, this study examined the association between sitting time and mortality in older adults with disability.
Prospective cohort of 2470 people aged ≥60 years. In 2000-2011, the study participants reported their sitting time and physical activity levels and were subsequently followed up through 2011 to ascertain mortality.
During an average follow-up of 8.7 years, 982 deaths occurred. Compared with people who spent seated <4 hours/d, the hazard ratio (95% confidence interval) of mortality was 1.27 (1.07-1.51) in those seated during 4-6 hours/d and 1.55 (1.29-1.87) in those seated for >6 hours/d. Each increment of 1 hour/day in sitting time was linked to a 7% increase in mortality. Compared with active individuals who spent seated <4 hours/day, those who were inactive and spent seated >6 hours/d showed the highest mortality (hazard ratio 1.82, 95% confidence interval 1.37-2.42).
Sitting time is associated with higher mortality in older people with disability. Interventions combining the reduction of sedentary behavior with increased physical activity should be developed and evaluated in this group of population.
人口老龄化进程的加剧导致残疾老年人数量增加。规律的体育活动已被证明可改善这些人的健康状况，但久坐行为的影响大多未知。因此，本研究调查了残疾老年人的久坐时间与死亡率之间的关联。
对2470名年龄≥60岁的人群进行前瞻性队列研究。在2000年至2011年期间，研究参与者报告了他们的久坐时间和身体活动水平，随后对其进行随访至2011年以确定死亡率。
在平均8.7年的随访期间，发生了982例死亡。与每天久坐时间<4小时的人相比，每天久坐4 - 6小时的人的死亡风险比（95%置信区间）为1.27（1.07 - 1.51），每天久坐>6小时的人的死亡风险比为1.55（1.29 - 1.87）。久坐时间每增加1小时/天，死亡率就会增加7%。与每天久坐时间<4小时的活跃个体相比，不活跃且每天久坐>6小时的个体死亡率最高（风险比1.82，95%置信区间1.37 - 2.42）。
久坐时间与残疾老年人的较高死亡率相关。应针对这一人群制定并评估将减少久坐行为与增加体育活动相结合的干预措施。
