本文对152例医院感染性肺炎进行了病例对照研究和危险因素分析。在单因素分析中发现病例组的年龄、住院时间、伴存基础疾病(心脑血管病、慢性肺部疾患、恶性肿瘤等)、住过 ICU 及吸氧的比例均高于对照组,其差别均有显著意义;进而做 Logistic 回归逐步法分析,吸氧、住院时间长、住过 ICU 仍为罹患医院感染性肺炎的危险困素。 In this paper, 152 cases of nosocomial pneumonia were case-control studies and risk factors analysis. In the univariate analysis, the cases of age, length of stay, concomitant underlying diseases (cardiovascular and cerebrovascular diseases, chronic lung disease, malignancies, etc.), living in ICU and oxygen were higher than the control group, the difference Have significant significance; then do Logistic regression step by step analysis, oxygen, hospitalization for a long time, lived in ICU is still suffering from nosocomial pneumonia dangerous risk factors.