Retrospective Cohort Study
Copyright ©The Author(s) 2022.
World J Gastrointest Surg. May 27, 2022; 14(5): 419-428
Published online May 27, 2022. doi: 10.4240/wjgs.v14.i5.419
Table 7 Karolinska Sleepiness Scale of surgeons during overtime and non-overtime operations

Control group
Overtime group
P value
KSS1.95 ± 0.66.4 ± 1.00