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Increased Incidence of Neonatal Hyperbilirubinemia at 3,100 m in Colorado
Lorna Grindlay Moore, PhD;
Mark A. Newberry, MA;
Gina M. Freeby;
Linda S. Crnic, PhD
Am J Dis Child. 1984;138(2):157-161.
Abstract
• The incidence of neonatal hyperbilirubinemia (defined as total serum bilirubin levels >12 mg/dL) in all infants born In a 14-month period at 3,100 m of altitude (32.7%) was more than twice that in infants born at 1,600 m of altitude (13.0%) and four times the incidence reported in the literature for sea level. A systematic comparison of factors known to influence serum bilirubin levels between 150 infants at 3,100 m and 378 infants at 1,600 m failed to disclose any factor(s) other than altitude that could account for the increased incidence of hyperbilirubinemia at high altitude. The mechanism responsible for this phenomenon is unknown, but we speculate that it may involve an adverse influence of high altitude on bilirubin load, conjugation, and/or uptake in neonatal life.
(AJDC 1984;138:157-161)
Author Affiliations
From the Cardiovascular Pulmonary Research Laboratory, Department of Medicine (Dr Moore) and Departments of Pediatrics and Psychiatry (Developmental Psychology Research Group; Division of Psychology) (Dr Crnic), University of Colorado School of Medicine, and the Department of Anthropology, University of Colorado (Dr Moore, Mr Newberry, and Ms Freeby), Denver.
Footnotes
Accepted for publication Aug 1, 1983.
Reprint requests to CVP Research Lab (B133), University of Colorado Health Sciences Center, 4200 E Ninth Ave, Denver, CO 80262 (Dr Moore).
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