Univariate analysis
After PCI, the patients who died in the hospital were older than those who survived, with a median age of 76 years (66-83 years) for patients who died in the hospital and 69 years (58-79 years) for surviving patients. There were more males (63.6%) than females undergoing PCI(Under different types of mechanical ventilation treatment, patients using noninvasive mechanical ventilation (NIMV) had the highest mortality rate (71.13%), followed by those using invasive mechanical ventilation (IMV) (15.39%), oxygen therapy (6.38%) and none (1.51%). The difference between the four treatments was significant (