**5. Conclusions**

Body temperature neither correlated with crSO2/cTOI nor with SpO2 and this finding was independent from gestational age. We found a weak negative correlation between prSO2 and body temperature in preterm neonates and a weak positive correlation between HR and body temperature in the whole cohort, as expected. Body temperature during immediate postnatal transition was statistically lower in preterm neonates compared to term neonates, but the difference was small and probably clinically irrelevant. Nevertheless, hypothermia was significantly more often observed in preterm neonates than in to term neonates. Preterm infants >28<sup>+</sup><sup>0</sup> and <32<sup>+</sup><sup>0</sup> weeks of gestation had the highest prevalence of hypothermia, whereas hyperthermia was most frequent in preterm infants born below 28<sup>+</sup><sup>0</sup> weeks of gestation. Therefore, attention to stringent body temperature managemen<sup>t</sup> should be paid not only to extremely preterm neonates but also to very and late preterm infants.

**Author Contributions:** Conceptualization: M.B., L.P.M., and A.R.; data curation: M.B. and L.P.M.; formal analysis: M.B. and A.R.; investigation: L.P.M., A.R., N.B.-S., B.S., and C.B.-H. Methodology: M.B., L.P.M., A.R., and G.P. Project administration: L.P.M. Resources: B.U. Supervision: G.P. Visualization: M.B. and L.P.M. Writing—original draft: M.B. and L.P.M. Writing—review and editing: M.B., L.P.M., A.R., N.B.-S., B.S., C.B.-H., B.U., and G.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** We thank the parents for their trust, so we were allowed to investigate their infants. We also thank all the staff members, especially Evelyn Ziehenberger, for contributing to this study.

**Conflicts of Interest:** The authors declare no conflict of interest.
