Risk of one-month and one-year all-cause mortality according to the four frailty instruments in hospitalized older patients.

*continuous variables.
**p-values obtained fitting univariate proportional hazard regression models, accounting for clustering due to centre effect.
HR: hazard ratio; CI: confidence intervals; FI-SOF: Frailty Index derived from the Study of Osteoporotic Fractures; FI-CD: Frailty Index based on cumulative deficits; FI-CGA: Frailty Index based on a Comprehensive Geriatric Assessment; MPI: Multidimensional Prognostic Index.

* 连续变量。
** 经单变量比例风险回归模型拟合得到的P值，已校正中心效应导致的聚类混杂。
HR：风险比（Hazard Ratio）；CI：置信区间（Confidence Intervals）；FI-SOF：骨质疏松性骨折研究衍生衰弱指数（Frailty Index derived from the Study of Osteoporotic Fractures）；FI-CD：基于累积缺陷的衰弱指数（Frailty Index based on cumulative deficits）；FI-CGA：基于综合老年评估的衰弱指数（Frailty Index based on a Comprehensive Geriatric Assessment）；MPI：多维预后指数（Multidimensional Prognostic Index）。