Abstract
Frailty commonly coexists with heart failure and although both have been associated with neurohormonal dysregulation, inflammation, catabolism, and skeletal muscle dysfunction, there are still no defined biomarkers to assess frailty, especially from the perspective of populations with cardiovascular diseases. This is a cross-sectional study with 106 outpatients with heart failure, aged ≥60years, which aimed to assess frailty through a physical (frailty phenotype) and multidimensional (Tilburg Frailty Indicator) approach and to analyze its association with inflammatory and humoral biomarkers (high sensitivity C-reactive protein [hs-CRP], interleukin 6, tumor necrosis factor-α, insulin-like growth factor-1, and total testosterone), clinical characteristics, and functional capacity. In univariate analysis, hs-CRP was associated with frailty in both phenotype and Tilburg Frailty Indicator assessment (PR=1.005, 95% confidence interval [CI] 1.001 to 1.009, p=0.027 and PR=1.015, 95% CI 1.006 to 1.024, p=0.001, respectively), which remained significant in the final multivariate model in the frailty assessment by the phenotype (PR=1.004, 95% CI 1.001 to 1.008, p=0.025). There was no statistically significant difference between the groups for other biomarkers analyzed. Frailty was also associated with worse functional capacity, nonoptimized pharmacological treatment and a greater number of drugs in use, age, female gender, and a greater number of comorbidities. In conclusion, frailty is associated with higher levels of hs-CRP, which can indicate it is a promising frailty biomarker.
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