Does nonadherence to local recommendations for empirical antibiotic therapy on admission to the intensive care unit have an impact on in-hospital mortality?

1/ To evaluate if empirical antibiotic prescription on admission to our intensive care unit (ICU) respects the local recommendations for antibiotic prescription and to identify predictors of nonadherence to these guidelines. 2/ To assess whether nonadherence to the guidelines is associated with increased in-hospital mortality due to the initial infection.