对１３２例成人细菌性肺炎的临床资料，利用多因素逐步回归原理，用电子计算机对其预后进行多因素分析，结果显示主要因素为及时合理抗生素治疗、左下肺、右下肺、左上肺、左中肺和血中性白细胞。其中，及时合理抗生素治疗是有利因素，其他五项是不利因素，提示及时合理抗生素治疗是决定细菌性肺炎预后的关键 132 cases of adult bacterial pneumonia clinical data, the use of multi-factor regression principle, the prognosis of computer using multivariate analysis, the results showed that the main factors for timely and appropriate antibiotic treatment, left lower lung, right lower lung, left upper left lung, left Middle lung and blood neutrophils. Among them, timely and reasonable treatment of antibiotics is a favorable factor, the other five are unfavorable factors, suggesting that timely and rational antibiotic treatment is the key to determine the prognosis of bacterial pneumonia