Frailty Index as a Predictor of Mortality in Middle-Aged and Older People: A Prospective Analysis of Chilean Adults
Autor
Diaz-Toro, Felipe
Nazar, Gabriela
Troncoso, Claudia
Concha-Cisternas, Yeny
Leiva-Ordoñez, Ana Maria
Martinez-Sanguinetti, Maria Adela
Parra-Soto, Solange
Lasserre-Laso, Nicole
Cigarroa, Igor
Mardones, Lorena
Vásquez-Gómez, Jaime
Petermann-Rocha, Fanny
Resumen
We aimed to investigate the association between frailty status and all-cause mortality in middle-aged and older people. We included 2661 individuals aged ≥ 35 from the Chilean National Health Survey 2009–2010. Mortality was determined through linkage with the Chilean Civil Registry and Identification. A 36-item frailty index (FI) was used to assess the frailty status. Associations between frailty status and all-cause mortality were assessed using Kaplan–Meier and Cox proportional hazard models adjusted for sociodemographic and lifestyle factors. A non-linear association was investigated using penalized cubic splines fitted in the Cox models. During an 8.9 median follow-up (interquartile range of 8.6–9.0), 308 individuals died (11.5%). Lower survival rates were observed in frail individuals compared to pre-frail and robust people (log-rank < 0.001). Compared with robust individuals, frail people had a higher mortality risk (HR: 2.35 [95% CI: 1.57 to 3.51]). Frail middle-aged individuals had a higher risk of dying independently of major risk factors.
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