Jaundice: clinical practice in 88,000 liveborn infants.

We reviewed jaundiced infants born between 1971 and 1989. Jaundice was diagnosed in infants whose serum bilirubin level was found to be 154 umol/l or greater. Of 88,137 livebirths, 10,944 (12.4%) were jaundiced. The most common aetiological factor was prematurity (20.3%), followed by ABO erythroblastosis (5.5%), sepsis (1.8%), Rh erythroblastosis (1.8%), bruising (1.3%), multifactorial (1.0%) and glucose-6-phosphate dehydrogenase deficiency (0.5%). In the remainder (67.8%) no cause was found or inadequate investigations were performed to determine a cause. During the period under review there was a significant increase (r = 0.91) in the proportion of newborn infants with jaundice of prematurity, in those not investigated (r = 0.92) and a decrease in the proportion with bruising (r = -0.90) as the cause. Phototherapy was used on 4,126 (37.7%) infants and exchange transfusion performed on 248 (2.3%). Causes of jaundice in infants requiring exchange transfusion were Rh erythroblastosis (108, 43.6%), ABO erythroblastosis (58, 23.4%), jaundice of prematurity (44, 17.7%) and a variety of causes in the remaining 38 (15.3%). Death occurred in 164 (1.5%) infants. In only 7 (4.3%), however, was the death possibly related to hyperbilirubinaemia or its treatment (Rh erythroblastosis (4), necrotizing enterocolitis following exchange transfusion (2) and pulmonary haemorrhage following exchange transfusion (1)). Phototherapy proved safe with no deaths attributable to its use.