Green J W, Wenzel R P
Ann Surg. 1977 Mar;185(3):264-8. doi: 10.1097/00000658-197703000-00002.
The increased hospital stay and direct cost of hospitalization that resulted from a postoperative wound infection (presence of pus at the incision site) after each of 6 common operations were evaluated. With the aid of the hospital computer, matched controls were obtained with respect to patient age, sex, exact operation performed, clinical service performing operation, pathologic finding, and underlying disease process which might alter the patient's predisposition toward infection. Several of the operations (appendectomy. cholecystectomy, total abdominal hysterectomy, and coronary artery bypass graft) were subtyped in order to obtain equivalence between controls and infected patients. In general, an infection doubles the postoperative stay and significantly increases the hospital expense.
对6种常见手术后发生的手术伤口感染（切口部位有脓液）所导致的住院时间延长和住院直接费用进行了评估。借助医院计算机，在患者年龄、性别、所实施的具体手术、实施手术的临床科室、病理检查结果以及可能改变患者感染易感性的基础疾病进程等方面获得了匹配对照。对其中几种手术（阑尾切除术、胆囊切除术、全腹子宫切除术和冠状动脉搭桥术）进行了亚型分类，以便使对照患者与感染患者之间具有可比性。一般来说，感染会使术后住院时间加倍，并显著增加住院费用。
