Ferkauf Graduate School of Psychology, Yeshiva University, Bronx, NY, USA.
Department of Neurology, Albert Einstein College of Medicine, Bronx, NY, USA.
Aging Clin Exp Res. 2023 May;35(5):1055-1062. doi: 10.1007/s40520-023-02371-5. Epub 2023 Feb 27.
Physical reserve (PR) refers to one's ability to maintain physical functioning despite age, illness, or injury. The measurement and predictive utility of PR, however, are not well established.
We quantified PR using a residual measurement approach by extracting standardized residuals from gait speed, while accounting for demographic and clinical/disease variables, and used it to predict fall-risk.
Participants (n = 510; age ≥ 70ys) were enrolled in a longitudinal study. Falls were assessed annually (in-person) and bimonthly (via structured telephone interview).
General Estimating Equations (GEE) revealed that higher baseline PR was associated with reduced odds of reporting falls over repeated assessments in the total sample, and incident falls among those without fall's history. The protective effect of PR against fall risk remained significant when adjusting for multiple demographic and medical confounders.
DISCUSSION/CONCLUSION: We propose a novel framework to assessing PR and demonstrate that higher PR is protective against fall-risk in older adults.
体力储备（PR）是指一个人在年龄、疾病或受伤的情况下保持身体机能的能力。然而，PR 的测量和预测效用尚未得到很好的确立。
我们通过从步态速度中提取标准化残差，使用剩余测量方法来量化 PR，同时考虑人口统计学和临床/疾病变量，并使用它来预测跌倒风险。
参与者（n=510；年龄≥70 岁）被纳入一项纵向研究。每年（亲自）和每两个月（通过结构化电话访谈）评估跌倒情况。
一般估计方程（GEE）显示，在总样本中，较高的基线 PR 与报告重复评估中跌倒的几率降低有关，并且在没有跌倒史的人中，PR 对跌倒风险的保护作用仍然显著，即使在调整了多个人口统计学和医学混杂因素后也是如此。
讨论/结论：我们提出了一种评估 PR 的新框架，并证明较高的 PR 可预防老年人跌倒风险。
