[Perinatal variables and association with very low birthweight newborns in a Brazilian public university hospital].

Purpose: To investigate the association of perinatal variables with the birth of very low birth weight (VLBW) preterm newborns.

Methods: It was a retrospective study of the medical records of infants born after spontaneous preterm labor with admission to a neonatal intensive care unit. Preterm infants were divided into two groups: very low birth weight (VLBW) group (weight <1,500 g) and low birth weight (LBW) group (weight ≥1,500 g and <2,500 g).