Abstract
To estimate whether neonates with cerebral white matter injury have significant elevations in nucleated red blood cell counts and to estimate their predictive ability in identifying injury. This case-control study identified 176 infants born at 23-34 weeks of gestation between November 1994 and October 2004 at a single university hospital and with cerebral white matter injury characterized by periventricular leukomalacia (PVL) or ventriculomegaly due to white matter atrophy. A control was matched to each case using the subsequent delivery within 7 days of that gestational age without brain injury. The gestational age at birth was 27 weeks for both groups, but the cases had a significantly lower birth weight (mean +/- standard deviation: 958 +/- 306 g compared with 1,038 +/- 381 g, P = .001). There was no difference in cesarean delivery (48% cases compared with 44% controls, P = .59). The cases had a significant increase in nucleated red blood cells per 100 white blood cells (WBC) (median, 5th percentile and 95th percentile: 22, 3 and 374 cases compared with 14, 1 and 312 controls; P = .02). Markers of chronic hypoxia, such as intrauterine growth restriction and oligohydramnios, and markers of acute hypoxia, such as an umbilical...Continue Reading
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