Sex difference in preoperative stress and sleeping duration related to the variation of preoperative heart rate and systolic blood pressure

[...]we hypothesize sex difference in stress affects vital signs, including preoperative heart rate (HR), respiratory rate (RR), systolic pressure (SP), and diastolic pressure (DP). [...]sex difference in stress might be discovered at various stages of lifespan, which are involved with activational and organizational influence of genes on the sex chromosomes and gonadal hormones [5]. Additionally, data in this study revealed males had lower stress level and higher sleep duration in preoperative night, in comparison of females. [...]sex difference in preoperative stress level and sleep duration contributed to variation of HR and SP.Funding Not applicable.Declaration of competing interest None.Acknowledgements All co-authors of this work are very grateful to clinical stuff (Ping, Chen, Chunhui Zhao, etc.) at the Department of Anesthesiology, First Affiliated Hospital, School of Medicine, Shihezi University, Xinjiang, China, for their support and kind help.