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A. Mean proportion of days that infants with evolving BPD received nebulized bronchodilators during their NICU stay, by hospital. Patient days= (mean patient days on any inhaled bronchodilator/mean length of stay). Mean length of stay= 96 days (SD= 47 days); median= 92 days. B. Mean bronchodilator inhalers charged per patient, by hospital. Hospitals were included if at least 25 patients developed BPD during the study period (N=15).
