Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, Brasil.
Centro Universitário de Patos de Minas, Pato de Minas, Brasil.
Cad Saude Publica. 2021 Dec 10;37(12):e00081320. doi: 10.1590/0102-311X00081320. eCollection 2021.
To examine changes in body mass index (BMI) among older Brazilian adults and associated factors. Longitudinal, population-based study, conducted in São Paulo, Brazil. Adults aged 60 years or over (n = 1,796) from the first wave of data collection from the Health, Well-Being, and Aging Study (SABE Project) conducted from 2000 to 2010. Repeated mixed-effects linear regression was used to analyze longitudinal changes in BMI and to examine whether sociodemographic characteristics, health conditions, and social behaviors were associated with these changes. Mean BMI decreased after 70 years. Men had lower BMI than women (β = -1.86, 95%CI: -2.35; -1.37). Older adults who consumed alcohol (β = 0.30, 95%CI: 0.06; 0.54), had more than one chronic disease (β = 0.19, 95%CI: 0.26; 0.72) and who did not perform physical activity (β = 0.56, 95%CI: 0.38; 0.74) had higher BMI. Subjects who smoked (β = -0.40, 95%CI: -0.76; -0.04) and who reported having eaten less food in recent months (β = -0.48, 95%CI: -0.71; -0.24) had lower BMI. In older Brazilians, several sociodemographic characteristics, health conditions, and behaviors predict BMI. Increasing prevalence of chronic diseases and growing sedentary behaviors in Brazil may have detrimental effects on BMI at older ages.
为了研究巴西老年成年人的体重指数（BMI）变化及其相关因素。这是一项纵向、基于人群的研究，在巴西圣保罗进行。研究对象为 2000 年至 2010 年进行的健康、福利和老龄化研究（SABE 项目）第一波数据收集时年龄在 60 岁及以上的成年人（n=1796）。采用重复混合效应线性回归分析 BMI 的纵向变化，并探讨社会人口特征、健康状况和社会行为是否与这些变化有关。结果发现，70 岁后 BMI 呈下降趋势。男性的 BMI 低于女性（β=-1.86，95%CI：-2.35；-1.37）。饮酒（β=0.30，95%CI：0.06；0.54）、患有多种慢性疾病（β=0.19，95%CI：0.26；0.72）和不进行体育活动（β=0.56，95%CI：0.38；0.74）的老年人BMI 更高。吸烟（β=-0.40，95%CI：-0.76；-0.04）和报告最近几个月进食量减少（β=-0.48，95%CI：-0.71；-0.24）的老年人 BMI 较低。在巴西老年人中，一些社会人口特征、健康状况和行为可以预测 BMI。巴西慢性疾病的患病率增加和久坐行为的增加可能对老年人的 BMI 产生不利影响。
