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A three-year study of obesity and its relationship to high blood pressure in adolescents.

A sample of 356 matched cases were tracked for three years during high school. Measures taken included self-reported behavior and clinical measures of height, weight, skinfold, blood pressure, and body mass index. Data were analyzed by ethnic group, age, and sex groups. Three year (1981-1982 to 1984-1985) trends for students who were overfat, overweight, and obese revealed: a relatively greater proportion of female to male students were overfat as seniors; overweight trends for each of the four groups (ethnic group and gender) were stable over the study period; a sharp increase of obesity trends among black females was observed; and significant positive relationships existed between Percent Ideal Body Weight, skinfold thickness, Body Mass Index, and blood pressure among females of both ethnic groups. The hypothesis that the early onset of obesity is an indicator of obesity in older adolescents was supported. Students classified at risk as freshmen are more likely to remain at risk as seniors.