The objective of this study was to examine the relationship between preterm infant treatments administered prior to the development of NEC, specifically number of PRC transfusions, weeks of antibiotic therapy for nosocomial infection, and number of mechanical ventilation days, with the development of NEC in perterm infants. We hypothesized that preterm infants who developed NEC would have
1.received significantly more PRC transfusions for anemia,
2.experienced more week of antibiotic therapy for nosocomial infection,
3.a higher number of mechanical ventilation days prior to developing NEC than would infants who did not develop NEC.