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American Journal of Epidemiology Vol. 110, No. 2: 205-218
Copyright © 1979 by The Johns Hopkins University School of Hygiene and Public Health

research-article

INFANT BLOOD PRESSURE AND HEART RATE: RELATION TO ETHNIC GROUP (BLACK OR WHITE), NUTRITION AND ELECTROLYTE INTAKE

JOSEPH SCHACHTER1,, LEWIS H. KULLER2, JEANNIE M. PERKINS3 and MARY E. RADIN4

1 Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh; Department of Psychiatry, University of Pittsburgh School of Medicine; and Pittsburgh Child Guidance Center
2 Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh
3 Department of Dietetics, Health Sciences Center Winnipeg, Manitoba, Canada
4 Pittsburgh Child Guidance Center

Reprint requests to Dr. Schachter, Pittsburgh Child Guidance Center, 201 De Soto St., Pittsburgh, PA 15213

Blood pressure (BP) and heart rate were measured during non-rapid-eye-movement sleep in 392 full-term newboms and in 318 of these infants at age six months. Two-day records of food intake were collected at age six months for 150 infants. Black babies did not differ substantially in BP from white babies either at birth or at six months. The earliest BP tracking was from age six to 15 months (systolic (SBP):r = .29, p < .001; diastolic: r = .45, p < .001). No relationship was found between BP at six months and breast- or bottle-feeding, infant weight or weight change, or nutrient intake. The relationship between parental BP, on the one hand, and infant electrolyte intake and BP on the other, suggested that electrolyte intake was related to BP in the six-month-old infant, and that the relationship was different in white babies than in black babies. Among 56 white infants whose mother's mean BP was above the median for this population, Infant sodium intake correlated with infant SBP (r = .31, p < .009). Among 32 black infants, regardless of parents' BP, sodium intake was negatively correlated with SBP (r = –.36, p < .021).

blood pressure; heart rate; hypertension; infant; newborn; sodium


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