Demographics of case and control groups.

Data are presented as means and ranges or number and percent. Maternal infections included chorioamnionitis. Infant sepsis was defined as any culture positive sepsis. Feeding history is described as the total enteral volume fed prior to time of NEC and the total enteral volume of breast milk fed prior to time of NEC. Antibiotic exposure and feeding history data on controls is reported for the time period prior to day of NEC diagnosis in the matched case.
GA, BWt, Apgars, Antibiotic exposure days, feeding history = mean and range
Sex, mode of delivery, maternal infection & antibiotics, infant sepsis = number (%)
Demographics of case and control groups.