1 research outputs found
Increased levels of soluble Receptor for Advanced Glycation End-Products (RAGE) are associated with a higher risk of mortality in frail older adults
Objective: To evaluate the relationship between serum levels of the soluble
Receptor for Advanced Glycation End-products (sRAGE) and mortality in frail and
non-frail older adults.
Methods: We studied 691 subjects (141 frail and 550 non-frail) with a median age of
75 years from two population-based cohorts, the Toledo Study of Healthy Aging and
the AMI study, who were enrolled to the FRAILOMIC initiative. Multivariate Cox
proportional hazards regression and Kaplan-Meier survival analysis were used to
assess the relationship between baseline sRAGE and mortality.
Results: During 6 years of follow-up 101 participants died (50 frail and 51 non-frail).
Frail individuals who died had significantly higher sRAGE levels than those who
survived (median [IQR]: 1563 [1015-2248] vs 1184 [870-1657] pg/mL, P=0.006),
whilst no differences were observed in the non-frail group (1262 [1056-1554] vs 1186
[919-1551] pg/mL, P=0.19). Among frail individuals higher sRAGE levels were
associated with an increased risk of death after adjustment for relevant covariates
(HR=2.72 per unit increment in ln-sRAGE, 95%CI 1.48-4.99, P=0.001). In contrast,
in non-frail individuals sRAGE showed no association with mortality. Survival curves
demonstrated that among frail individuals the incidence of death was significantly
higher in the top sRAGE quartile compared to the three lower quartiles (P=0.002).
Area under the ROC curve analysis demonstrated that for frail individuals, inclusion
of sRAGE in the hazard model increased its predictive accuracy by ~3%.
Conclusions: sRAGE is an independent predictor of mortality among frail
individuals. Determination of sRAGE in frail subjects could be useful for prognostic
assessment and treatment stratification