Creatinine levels during early postnatal period.

<p>A. nSCr of preterm infants born at <29 weeks’ gestational age from birth until four weeks of life. B. Serum and plasma creatinine levels in three groups of preterm infants born at gestationsal age of <29 weeks’ at one month are presented as box (interquartile range) and whisker (5%–95% range) plots. Creatinine at day 7 was plasma creatinine. †<i>P</i><0.05.