Comparison of demographic and cord blood data between newborns in the less severe hyperbilirubinemic group and the five newborns who developed severe hyperbilirubinemia despite having a low cord blood hydorgen peroxide level.

Abbreviations: GA, gestational age; BW, body weight.
BW loss: physiological body weight loss = (birth weight−lowest body weight)/birth weight.
↓ or ↑: beyond mean ±1 standard deviation when compared with the less severe icteric group.
↑*: bilirubin concentration beyond mean ±0.5 standard deviation when compared with the less severe hyperbilirubinemic group.