- Children will not be surveyed because the prevalence of the condition being studied (hypertension) is low and does not justify the added logistical difficulties in obtaining informed consent. Although the population surveyed will be restricted to adult black men, the barbershop provides an excellent setting to foster blood pressure screening in children and adolescents who comprise 15-20% of the barbershop clientele. During the study period, staff may offer blood pressure screening to all children accompanied by a parent and to all adolescents.