METHODS The data were collected and analyzed by prospective monitoring combined with retrospective investigation.
方法采用前瞻性监测与回顾性调查相结合，将资料汇总进行统计分析。
METHODS All data of patients who suffered from hospital acquired infection in ICU from 2001 to 2003 were analyzed by prospective monitoring and retrospective studies.
方法对2001 ~ 2003年入住icu，发生医院感染患者的临床资料，采取前瞻性监测与回顾性调查相结合的方法进行整理分析。
METHODS All data of patients who suffered from hospital acquired infection in ICU from 2001 to 2003 were analyzed by prospective monitoring and retrospective studies.
方法对2001 ~ 2003年入住icu，发生医院感染患者的临床资料，采取前瞻性监测与回顾性调查相结合的方法进行整理分析。
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