Sousa Ana Sofia, Mendes Joana, Guerra Rita S, Padrão Patrícia, Moreira Pedro, Santos Alejandro, Borges Nuno, Afonso Cláudia, Martins Cátia, Ferro Graça, Amaral Teresa F
Faculty of Nutrition and Food Science, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Faculty of Health Sciences (Nutrition Sciences), Fernando Pessoa University, Praça de 9 de Abril 349, 4249-004 Porto, Portugal.
Eur J Ageing. 2019 Sep 12;17(3):321-330. doi: 10.1007/s10433-019-00532-y. eCollection 2020 Sep.
Older adults are particularly susceptible to sedentary behaviours. Sitting time has been increasingly referred to as a potentially modifiable risk factor in the prevention of chronic diseases. Identifying factors associated with sitting time, particularly those that are modifiable, will allow for more effective public health strategies. This study aimed to describe sitting time among Portuguese older adults and to evaluate associated factors. A cross-sectional study including 1423 older adults ≥ 65 years old was conducted. Sitting time was assessed with the International Physical Activity Questionnaire. Socio-demographic, health, anthropometric and functional variables were collected. Bivariate and multivariate linear regression models were conducted to study the association between these variables and sitting time. The median of sitting time was 300 min/day (interquartile range = 240 min/day), which is equal to 5 h/day. The following factors were directly associated with longer sitting time: being male, age ≥ 80 years, living in Central or Southern Portugal, being retired from work, as well as presenting low physical activity, obesity or longer time to walk 4.6 metres. On the other hand, being married, having higher education and higher household income were inversely associated with longer sitting time. It can be concluded that Portuguese older adults spend a considerable amount of time sitting per day. Potentially modifiable risk factors associated with longer sitting time in this population were related to nutritional status and functional ability.
老年人尤其容易养成久坐的习惯。久坐时间越来越被视为预防慢性病的一个潜在可改变的风险因素。确定与久坐时间相关的因素，尤其是那些可改变的因素，将有助于制定更有效的公共卫生策略。本研究旨在描述葡萄牙老年人的久坐时间，并评估相关因素。开展了一项横断面研究，纳入了1423名65岁及以上的老年人。使用国际体力活动问卷评估久坐时间。收集了社会人口学、健康、人体测量和功能变量。采用双变量和多变量线性回归模型研究这些变量与久坐时间之间的关联。久坐时间的中位数为300分钟/天（四分位间距=240分钟/天），即5小时/天。以下因素与更长的久坐时间直接相关：男性、年龄≥80岁、居住在葡萄牙中部或南部、已退休、以及体力活动水平低、肥胖或行走4.6米所需时间较长。另一方面，已婚、受过高等教育和家庭收入较高与更长的久坐时间呈负相关。可以得出结论，葡萄牙老年人每天花大量时间久坐。该人群中与更长久坐时间相关的潜在可改变风险因素与营养状况和功能能力有关。
