# The association of biological age and its trajectory with incident heart failure: a cohort study from China

## TL;DR

This study shows that people with accelerated biological aging have a higher risk of developing heart failure compared to those with normal aging.

## Contribution

The study introduces a clinical-parameter-based biological age model and examines its trajectory associations with incident heart failure in a large Chinese cohort.

## Key findings

- Accelerated biological aging is linked to a 30% higher risk of heart failure.
- Individuals with a high-stable biological aging trajectory face the highest heart failure risk.
- A high-descending trajectory is associated with a significantly lower heart failure risk.

## Abstract

Research on biological age focused on the optimization and upgrading of aging clocks, which can now prospectively predict a variety of diseases. The biological age (BA) based on clinical parameters has shown predictive value for cardiovascular disease. However, evidence linking BA and its trajectories with heart failure (HF) remained limited. This study aimed to construct a clinical-parameter-based BA and to investigate its association, along with BA trajectories, with incident heart failure.

This study utilized data from the Kailuan Study, which included 76,908 Chinese adults who underwent their first health examination between 2006 and 2007. A deep neural network model was employed to estimate BA based on 32 clinical indicators. Participants were stratified into three groups-decelerated aging, accelerated aging, and normal aging-according to their baseline BA values. Six distinct aging trajectories were subsequently identified using data from the first three follow-up examinations. Cox proportional hazard models were applied to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for the associations between aging status or BA trajectories and HF incidence.

Participants exhibiting accelerated aging demonstrated a 30% higher risk of HF (HR: 1.30; 95%CI: 1.19–1.43) compared to those with normal aging. Conversely, those following a high-stable trajectory demonstrated the highest risk of HF (HR: 1.79; 95%CI: 1.48–2.17). Additionally, when compared to the high-stable trajectory, the high-descending trajectory was linked to a significantly lower risk of HF (HR: 0.74; 95%CI: 0.60–0.91).

Accelerated biological aging significantly increased the risk of HF, whereas decelerated biological aging was linked to a reduced risk of HF. Individuals who consistently exhibited a higher level of biological aging were at the greatest risk for HF.