BACKGROUND: Infections are the leading cause of morbidity and mortality after colorectal surgery. Obesity is a well-known risk factor for wound infection, but it does not seem to increase the risk of other infectious complications. The aim of this study was to look for a relationship between the fatty tissue metabolism measured by adipocytokine levels and the risk of postoperative infection. PATIENTS AND METHODS: Preoperative plasma levels of eight adipocytokines, cholesterol, triglycerides, insulin and C-reactive protein (CRP) were measured in consecutive patients undergoing elective colorectal surgery between June 2008 and June 2011. Information about epidemiological and clinical characteristics was obtained for each patient. All infections in the 30 days following surgery were recorded. RESULTS: Among the 174 patients included, 49 (28 %) presented with a postoperative infection: 41 surgical site infections and 8 other infections. Preoperative leptin, insulin and CRP were significantly higher in patients with postoperative infection (p = 0.025, p = 0.020 and p = 0.044, respectively), but only leptin was predictive of infection in multivariate analysis (odds ratio (OR) = 1.89, 95 % confidence interval (CI) 1.18-3.03, p = 0.008). The predictive value of leptin was slightly lower for surgical site infection (OR = 1.65, 95 % CI 1.06-2.55, p = 0.025). Leptin levels were independent of the other adipocytokine levels but not of the body mass index. CONCLUSION: Although markers of inflammation and insulin resistance are also related to the onset of surgical infection, leptin correlates more closely with the risk of infection than does any other factor. However, its effect could be partially mediated by the body mass index.
BACKGROUND: Infections are the leading cause of morbidity and mortality after colorectal surgery. Obesity is a well-known risk factor for wound infection, but it does not seem to increase the risk of other infectious complications. The aim of this study was to look for a relationship between the fatty tissue metabolism measured by adipocytokine levels and the risk of postoperative infection. PATIENTS AND METHODS: Preoperative plasma levels of eight adipocytokines, cholesterol, triglycerides, insulin and C-reactive protein (CRP) were measured in consecutive patients undergoing elective colorectal surgery between June 2008 and June 2011. Information about epidemiological and clinical characteristics was obtained for each patient. All infections in the 30 days following surgery were recorded. RESULTS: Among the 174 patients included, 49 (28 %) presented with a postoperative infection: 41 surgical site infections and 8 other infections. Preoperative leptin, insulin and CRP were significantly higher in patients with postoperative infection (p = 0.025, p = 0.020 and p = 0.044, respectively), but only leptin was predictive of infection in multivariate analysis (odds ratio (OR) = 1.89, 95 % confidence interval (CI) 1.18-3.03, p = 0.008). The predictive value of leptin was slightly lower for surgical site infection (OR = 1.65, 95 % CI 1.06-2.55, p = 0.025). Leptin levels were independent of the other adipocytokine levels but not of the body mass index. CONCLUSION: Although markers of inflammation and insulin resistance are also related to the onset of surgical infection, leptin correlates more closely with the risk of infection than does any other factor. However, its effect could be partially mediated by the body mass index.
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