Association between C reactive protein and all-cause mortality in the ELSA-Brasil cohort

Chams B Maluf1, Sandhi Maria Barreto2, Luana Giatti2

  • 1Clinical Pathology, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil chamsbm12@gmail.com.

Insights

High-sensitivity C reactive protein (hsCRP) is linked to increased mortality risk in a diverse Brazilian population. This association remained significant even after accounting for various health and lifestyle factors.

Area of Science:

  • Biomedical research
  • Epidemiology
  • Public health

Background:

  • High-sensitivity C-reactive protein (hsCRP) is a potential biomarker for cardiovascular and non-vascular mortality.
  • Existing evidence primarily originates from North American and European populations.
  • The role of hsCRP in mortality risk within multiethnic populations remains underexplored.

Purpose of the Study:

  • To investigate the association between hsCRP levels and all-cause mortality risk.
  • To examine this association in a multiethnic Brazilian cohort.
  • To determine if the association persists after adjusting for confounders.

Main Methods:

  • Utilized baseline data from 14,238 participants in the Brazilian Longitudinal Study of Adult Health (2008-2010).
  • Assayed hsCRP using immunochemistry.
  • Employed Cox regression analysis for univariate and adjusted models over a mean follow-up of 8.0±1.1 years.

Main Results:

  • Mortality risk increased progressively with higher hsCRP quartiles (Q2: HR 1.45, Q4: HR 1.95 vs. Q1).
  • The graded association persisted after excluding early deaths, suggesting it's not due to reverse causality.
  • Hazard ratios remained consistent after excluding participants with self-reported diabetes, cancer, or COPD.

Conclusions:

  • hsCRP levels are significantly associated with all-cause mortality in a highly admixed Brazilian population.
  • This association is independent of a wide range of lifestyle and clinical variables.
  • hsCRP may serve as a valuable mortality risk marker across diverse ethnic groups.
Abstract

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