title: Diurnal variation in serum bilirubin concentrations in infants with neonatal jaundice.
abstract: We investigated whether there are independent intradaily changes in bilirubin levels in neonates. Healthy term newborn infants (n = 124) with neonatal jaundice bilirubin >/t171 mmol/L (10mg/dl) were studied for at least 3 consecutive days. Starting from the second day of life, consistent intradaily changes were observed in bilirubin levels (morning levels were greater than evening levels; p < 0.001), and body weight steadily increased. This diurnal variation in bilirubin levels should be considered in the follow-up and treatment of neonatal jaundice.
mesh_terms: D001663:Bilirubin / Q000097:blood*; D002940:Circadian Rhythm; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007567:Jaundice, Neonatal / Q000097:blood*; D008297:Male; D012016:Reference Values; D013997:Time Factors
chemical_list: D001663:Bilirubin