Numbers of subjects from the multicenter prospective study used in the analysis of infant colonization with antimicrobial-resistant GNB within 7 days of NICU discharge. The study sample included 1320 infants with a complete set of 3 surveillance swabs: 1 swab of the anterior nares for S aureus, 1 swab of the skin for S aureus, and 1 perirectal swab for GNB and enterococci (results of testing for S aureus and enterococci are not provided). Abbreviations: GNB, Gram-negative bacilli; LOS, length of stay; NICU, neonatal intensive care unit.