In the evaluation, the investigators compared blood pressure control morbidity and mortality between these two intervention arms of the registry. The innovative educational approach to health care providers utilized the existing community-based Area Health Education Center (AHEC) network to communicate community-determined hypertension control needs and community-determined hypertension control strategies to health care providers and students. The research was designed to elucidate community factors in the inner city that dictated strategies necessary for success in a variety inner city environments. Specifically, the investigators examined the effect of community size and level of community stress (as indicated by poverty, crime, etc.) on program development and outcome. To do this, they implemented the program in one city-wide community (Milwaukee) and in three well defined, homogeneous inner city neighborhoods of Chicago which had differing levels of community stress indicators. They evaluated the effect of size and community stress levels on the program strategies and successes.