The Impact of Postdischarge Infection on Surgical Wound Infection Rates

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Abstract
We undertook a study of postdischarge infections to assess the reliability of a surgical wound surveillance program in a 930-bed teaching hospital. During a six-month period, a subset of operations performed each day was randomly selected and patients interviewed by telephone one month postsurgery using a standard set of questions. The infection rate for all patients contacted directly postdischarge was 5.4%, whereas the surgical wound infection rate determined for all procedures through the standard hospital program was 1.5%. For day-surgery patients, who are not routinely followed in the hospital surveillance program, 8 (7.8%) of 103 patients contacted had infection. Thus, the overall surgical infection rate determined in this study was over three times higher than that calculated using standard surveillance. A reliable method for identifying postdischarge wound infections is necessary to ensure accurate surgical wound infection rates.