Table 1 The categories of CC reasons

non-specified reasons

the CC reasons were not recorded

patient related

no-show of patients

sudden nonclinical condition changes of patients

temporary refusal of patients or their family

violating doctor’s advice

other cancellations caused by patients

doctor related

the doctor was unavailable

doctors cancelled cases without any reasons

support system issues

the shortage of blood

no postoperative intensive care unit beds

the OR being occupied by an emergency case

malfunctioning equipment

other reasons related to resources of surgery

coordination causes

surgery information not being shared among staffs

administrative errors

scheduling errors

workup issues

the preoperative diagnostic assessment related issues

the sudden medical condition changes