Extended Data Fig. 2: Frailty index and its individual components.
From: Gut microbial features and circulating metabolomic signatures of frailty in older adults
a, Distribution of the frailty index (FI) in the study population. Each participant’s FI was evaluated by 33-item deficits in 5 domains (Methods). The total FI ranged from 0 (no frailty) to 1 (severe frailty). Higher FI values indicated a greater presence of disabilities, diseases, symptoms, signs, cognitive and psychological abnormalities among participants. b, Correlations between FI and indices of its individual domains. Values in the figure are spearman correlation coefficients. As expected, the composite FI scores were not dominated by any single component and the disability domain exhibited the strongest correlation with the FI, as evidenced by the highest correlation coefficient. c, Association of FI with 2-year mortality risk in all participants. P-value was estimated by long-rank test.
