Health Ahead Comparative Effectiveness Study

The Health Ahead Comparative Effectiveness Study is a pragmatic, parallel-arm interventional platform that systematically compares successive changes to preventive health screening - each isolated as a single variable against current practice - on the path toward a fully automated screening system deployable in any environment, including the most isolated and resource-limited communities. Each comparison is evaluated with a common set of engagement, behavior-change, experience, cost, and longitudinal outcome measures, allowing results to accumulate on a consistent yardstick across the life of the platform. The first comparison evaluates static versus interactive personalized health report delivery. Subsequent pre-planned comparisons, added by protocol amendment, evaluate mobile community versus fixed laboratory screening; and a hybrid medical-droid plus human-delivery model versus human-only screening. All participants are simultaneously enrolled in the 100-Year Human Aging Study and the Human Observatory Study, contributing individual longitudinal and population-level causal inference data through those protocols.