Neighborhood health workers were trained and certified in taking blood pressure (BP), phlebotomy, and CO measurements at the Center for Health Promotion at Johns Hopkins, which had an NHW training program for blood pressure. Outcomes measures included changes in blood pressure, smoking behavior, and plasma concentrations of lipids and lipoproteins. Attention was paid to potential modifying factors such as demographic factors (e.g., education, socioeconomic status, income, occupation).