[Discriminant factors of risk of infection in routine digestive surgery. Trial apropos of 308 cases].

Postoperative infection in routine digestive surgery is a common complication, its prevalence being variously assessed between 10 and 30%. Study of criteria of infectious risk, whether inherent to the subject or his environment, has not been the subject of overall evaluation. The present study involved 308 subjects in two departments of surgery with different geographical and architectural features. A comparison was first made between the two departments in terms of the surgical population and the reaction rate. The presence was then sought of a relationship between infection, whether general or local (urinary tract, pulmonary, septicaemia) and factors concerning the bacteriological environment and factors indicative of the resistance of the subject. The statistical technique of discriminant analysis was used to determine the preponderance of certain factors which might be indicative of at risk subjects.