title: Reliability of the twenty-four-hour nitrogen balance in parenterally fed newborn infants.
abstract: The reliability of shorter nitrogen balance determinations was evaluated in order to facilitate the nutritional assessment of parenterally fed infants. The intraindividual day-to-day variations of nitrogen intake, excretion, and retention were analyzed in 23 parenterally fed newborn infants (birth weight: 785-2630 g). Nitrogen retentions measured over 3 consecutive days were highly correlated (r = 0.90-0.96), and the reliability for a single 24-hr collection was estimated by r1 = 0.93. Nitrogen balance data obtained over a 24-hr period are reliable for the purpose of clinical investigations, provided the nutrient intake is constant.
authors.affiliation: Service de Neonatologie, Hôpital Sainte-Justine, Montreal, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Pineault
authors.forename: U
authors.initials: U
authors.lastname: Maag
authors.forename: P
authors.initials: P
authors.lastname: Chessex
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D007231:Infant, Newborn / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D015596:Nutrition Assessment; D010289:Parenteral Nutrition, Total; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013997:Time Factors
chemical_list: D009584:Nitrogen