The incidence of NI is 22.9%, and 29.3/1000 patient-days, in which nosocomial pneumonia accounts for 49.4%, 43.1/1000 ventilator-days, septicemia: 27.3%, 49.3/1000 central catheter-days, surgical site infection: 12.3%, catheterinduced infection: 11.7%, urinary tract infection: 5.8%, 41.9/1000 urinary catheter-days.