Generalizability of the gait foundation model to other populations

Establish whether the gait foundation model trained on 3D skeletal motion from the Human Phenotype Project generalizes to populations beyond predominantly Ashkenazi Jewish adults residing in Israel, by assessing the predictive utility of the learned gait embeddings in ethnically and geographically diverse cohorts.

Background

The study trains a masked autoencoder-based gait representation model on 3,414 adults primarily of Ashkenazi Jewish ancestry from Israel within the Human Phenotype Project. While the model demonstrates broad phenome-wide predictive performance, the authors note that the cohort’s limited demographic diversity may constrain external validity.

The authors explicitly flag that generalizability to other populations remains unverified, highlighting the need to evaluate the model’s performance and potential domain shifts when applied to ethnically and geographically distinct groups.