Exclusion criteria
NEC, skull fracture, atelectasis
GASTROINTESTINAL DISEASES, ATELECTASIS
Intubated preterm infants without cardiorespiratory stabilization and with pneumothorax, vomiting or bilious-stained gastric aspirate, other gastrointestinal diseases, NEC, skull fracture, severe atelectasis or a history of surgery that might impact their comfort, and a condition that prevented the placement of a chest tube or parent's/infant's KMC position were not included in the research. Furthermore, mothers not speaking Turkish were not enrolled in the study.Power analysis was performed in the G*Power (3.1.9.2) program for the purpose of finding the sample number. The effect size (d) of 0.555 was computed using the mean (0.9 and 2.0) and standard deviations (1.6 and 2.3) obtained from the relevant literature [Flow chart of research.The urn method, which represents a method of randomization that is equivalent to the full randomization method, was employed to ensure the randomization of the groups. Two parameters, 