例句 /

Patients undergoing surgery from July 2003 through October 2005 were compared with cohorts from June 2001 through June 2003 in a 15-bed general intensive care unit of a general hospital.

Patients undergoing surgery from July 2003 through October 2005 were compared with cohorts from June 2001 through June 2003 in a 15-bed general intensive care unit of a general hospital.

观察死亡率、肺内感染的发生率、上呼吸机时间、住院时间等指标。