Sociodemographic bias in LLMs' clinical decision-making for dizziness.

Differences were attenuated when vignettes contained clearer diagnostic information.

Other effects were smaller, including increased neuroimaging recommendations for low-income descriptors (+4.0 pp; 95% CI 2.1-5.8).

ConclusionLLM clinical recommendations varied by sociodemographic descriptors, particularly under diagnostic uncertainty.