“…By contrast with the study by Kollef and colleagues, 2 which was unable to show non-inferiority for doripenem, the other two studies 3,4 compared doripenem with comparators over a similar treatment duration and reported noninferiority for doripenem. Doripenem was most commonly used for treating pneumonia in a surveillance study, 5 and a meta-analysis up to April, 2019, 6 showed that doripenem was non-inferior to comparators in the treatment of nosocomial pneumonia and ventilator-associated pneumonia. Therefore, we wonder whether doripenem can achieve noninferior efficacy if it can be used for the same duration as the comparator.…”