Experience in a Neonatal Intensive Care Unit Affects Pain Response

Objective. To determine the effect of being in the neonatal intensive care unit (NICU) on pain responses in infants of 32 weeks' postconceptual age (PCA). Design. A cross-sectional comparative design was used. Setting. Two level III NICUs, each in metropolitan, university teaching hospitals. Patients. Infants of 32 weeks' PCA born within the past 4 days (the newly born group; n = 53) were compared with infants of the same PCA who had been born 4...