# Prediction of future aging-related slow gait and its determinants with deep learning and logistic regression

## TL;DR

This paper uses deep learning and logistic regression to predict slow gait, a sign of accelerated aging, and identifies key factors like age and BMI.

## Contribution

The novel use of a deep learning neural network to predict future slow gait and compare it with logistic regression.

## Key findings

- The deep learning model achieved 81.2% sensitivity and 87.9% specificity for predicting slow gait 10 years in advance.
- Logistic regression achieved 84.5% sensitivity and 86.3% specificity for the same prediction task.
- Age, BMI, sleep, and grip strength were identified as the strongest determinants of future slow gait.

## Abstract

Identification of accelerated aging and its biomarkers can lead to more timely therapeutic interventions and decision-making. Therefore, we sought to predict aging-related slow gait, a known predictor of accelerated aging, and its determinants.

We applied a deep learning neural network (NN) and compared it to conventional logistic regression (LR) analysis. We incorporated 1,363 participants from the Baltimore Longitudinal Study of Aging to predict current and future slow gait at 6-year and 10-year follow-up using two clinically-relevant cut-points.

Our NN achieved a maximum sensitivity (specificity) of 81.2% (87.9%), for a 10-year prediction with 0.8 m/s cut-point. We demonstrated the necessity of class balancing and found the NN to perform comparably to or in some cases, better than, LR which achieved a maximum sensitivity and specificity of 84.5% and 86.3%, respectively. Sobol index analysis identified the strongest determinants to be age, BMI, sleep, and grip strength.

The novel use of a NN for this purpose, and successful benchmarking against conventional techniques, justifies further exploration and expansion of this model.