Receiver operator curve study design. The analysis marked with † included 2,500 (36.4%) plates with ertapenem diameters of 6 to 27 mm or meropenem diameters of 6 to 32 mm, 2,102 (30.6%) plates without MAC growth, and 1,869 (27.2%) plates with ertapenem diameters of >27 mm and meropenem diameters of >32 mm.