TABLE 2.

Comparison of 24- and 48-h results by method and by antimicrobial agent^a

Antimicrobial agent	Agar dilution		Broth microdilution
	r	Slope	r	Slope
Amikacin	0.96	1.00	0.95	0.96
Gentamicin	0.98	0.97	0.96	0.96
Tobramycin	0.97	0.98	0.95	0.95
Ciprofloxacin	0.93	0.95	0.94	0.96
Piperacillin	0.92	0.82	0.95	0.91
Ticarcillin	0.93	0.91	0.93	0.87
Piperacillin-tazobactam	0.93	0.88	0.93	0.89
Ticarcillin-clavulanate	0.93	0.85	0.93	0.88
Ceftazidime	0.97	0.96	0.95	0.90
Aztreonam	0.97	0.95	0.91	0.88
Imipenem	0.95	0.89	0.93	0.81
Meropenem	0.94	0.88	0.94	0.87

^an = 7,010. r = correlation coefficient.