FACTORS ASSOCIATED WITH DYNAPENIA IN OLDER ADULTS IN THE NORTHEAST OF BRAZIL

ABSTRACT This study identified factors associated with dynapenia in older adults residing in a small town in northeastern Brazil. It is a population-based study conducted with 208 senior citizens (58.7% women) from Aiquara, BA. Sociodemographic, behavioral and health information were obtained from face-to-face interviews, and nutritional status was assessed by body mass index. To measure their level of physical activity and sedentary behavior, the International Physical Activity Questionnaire was used. Dynapenia was diagnosed by sex, from the 25th percentile of handgrip strength, by means of a hydraulic dynamometer. For inferential analyses, Poisson regression was used, with a robust estimator, calculation of Prevalence Ratios (PRs) and their respective 95% Confidence Intervals (CIs). The prevalence of dynapenia was higher in older adults aged 70-79 (PR: 3.21; 95%CI: 1.55-6.64) and ≥80 years (PR: 4.91; 95%CI: 2.32-10.39), in those with low weight (PR: 2.20; 95%CI: 1.26-3.82), in those who are insufficiently active (PR: 1.99; 95%CI: 1.12-3.54), and among those with high level of sedentary behavior (PR: 1.88; 95%CI: 1.19-2.98). The factors identified as being associated with dynapenia were: age between 70 and 79 and ≥80 years, insufficient level of physical activity; high level of sedentary behavior, and low weight.

摘要：本研究旨在明确巴西东北部某小镇老年居民肌力低下症（dynapenia）的相关影响因素。本研究为基于人群的观察性研究，共纳入来自巴西巴伊亚州艾夸拉市的208名老年人，其中女性占比58.7%。研究通过面对面访谈收集了受试者的社会人口学特征、行为习惯及健康相关信息，并以体重指数（body mass index, BMI）评估其营养状况；采用国际体力活动问卷（International Physical Activity Questionnaire, IPAQ）评估受试者的体力活动水平与久坐行为模式。本研究以液压握力计测量受试者握力，并按性别以握力的第25百分位数作为诊断阈值，以此判定肌力低下症。推论统计分析采用搭载稳健估计量的泊松回归模型，计算患病率比（Prevalence Ratios, PRs）及其对应的95%置信区间（Confidence Intervals, CIs）。结果显示，70~79岁、≥80岁的老年人（患病率比分别为3.21，95%置信区间：1.55~6.64；4.91，95%置信区间：2.32~10.39）、低体重人群（PR=2.20，95%CI：1.26~3.82）、体力活动不足者（PR=1.99，95%CI：1.12~3.54）以及久坐行为水平较高者（PR=1.88，95%CI：1.19~2.98）的肌力低下症患病率显著更高。本研究最终确定的与肌力低下症相关的影响因素包括：70~79岁及≥80岁年龄组、体力活动不足、久坐行为水平较高以及低体重。