Five hundred men and 500 women were recruited from households in neighborhood blocks randomly assigned to a more or less intensive educational-behavioral intervention. Both groups received usual medical care, community HBP education, and HBP patient education materials. In addition, the more intensive group received 1) individualized educational counseling sessions with the CHW to increase understanding of HBP and to address barriers to control of HBP; 2) outreach and follow-up to address inadequate health care resources and health behavior related skills through interim monitoring and education "booster" sessions; and 3) mobilization of social support from a family member/friend identified by the participant as the primary source of daily reinforcement.