Blood pressure: distribution in students of junior and senior high schools in Saint John, NB.

Blood pressures were recorded for 8950 students (82.4% of the total student population) of the junior high and high schools of Saint John, NB. Among the boys the mean systolic pressure rose from 104 mm Hg at age 12 to 117 mm Hg at age 18; among the girls the rise was from 105 to 110 mm Hg. The mean diastolic pressure also rose, from 61 to 67 mm Hg, in both sexes. These data are similar to those found in epidemiologic studies in Montreal and Bogalusa, Louisiana. However, the mean systolic values are lower by 10 mm Hg than those in an Edmonton study and the norms published by a United States task force. Recording methods could explain some of the observed differences, but population differences may also contribute. The discrepancies suggest that the current standards for children and adolescents need to be reassessed.