# Media health literacy predicts preventive health behaviors: findings from a nationally matched survey

## TL;DR

This study introduces a new way to measure how well people use media for health and finds that better media health literacy is linked to healthier behaviors like getting vaccinated and avoiding smoking.

## Contribution

The paper presents the first validated measurement of Adult Media Health Literacy and demonstrates its independent association with preventive health behaviors.

## Key findings

- Higher AMHL scores correlate with increased odds of vaccination, mammography, and annual exams.
- AMHL scores are associated with decreased odds of smoking and vaping.
- The AMHL Index is a reliable and valid measure with no collinearity issues.

## Abstract

To produce the first validated measurement of Adult Media Health Literacy (AMHL) and examine associations between scores on the new index and eight specific health behaviors and outcomes.

A cross-sectional survey was conducted in 2023 with a non-probability sample of 589 U.S. adults ages 25–64, matched to national census demographics for age, gender, race, and education. The survey included the AMHL Index and outcome measures on smoking, vaping, vaccination, annual exams, mammography, colon cancer screening, and chronic health status. The predictive validity of the Index was evaluated using PLS-SEM. Covariate-adjusted linear and logistic regression models assessed the relationship between participants’ composite scores and reported health behaviors and outcomes.

All Index indicators demonstrated no collinearity concerns and a reliable measurement. Higher AMHL scores were significantly associated with higher odds of preventive health behaviors. A single-point increase on the Index was independently associated with increased odds of vaccination, mammography, and annual exam attendance, and decreased odds of smoking and vaping.

The study provides the first validated AMHL measure and evidence for the independent role media literacy plays as a social determinant of health. Multi-sector intervention opportunities are discussed.