Risk factors for periventricular echodensities and outcomes in preterm infants.

Objectives: To determine the incidence, risk factors and outcomes associated with transient and/or persistent periventricular echodensities (PVED) among preterm infants.

Methods: Medical records of preterm infants born at ≤ 32 weeks gestational age (GA) with PVED and no other brain pathology were reviewed and compared to matched control infants in a case-controlled retrospective study. Neurodevelopmental outcomes at 8-24 months corrected age were documented.

Results: A 17.8% incidence of PVED was recorded, with the highest incidence of 30-40% recorded at 29-31 weeks GA. Study and control groups were similar for all maternal parameters and neonatal morbidities, except for a higher incidence of respiratory distress syndrome among the study group. PVED at one month of age was predicted by 5 min Apgar score < 7 [OR = 33.78 (CI 2.94-388.06, p = 0.005)]. PVED was not associated with long-term neurodevelopmental disability.

Conclusions: No risk factors or specific associated morbidities were identified among preterm infants with transient PVED. PVED at one month of age was predicted by low 5 min Apgar scores, possibly suggesting different pathogenesis or timing between the groups. Long-term outcome studies are needed to determine PVED impact.