. 2015 Mar 3;6(2):e00080-15. doi: 10.1128/mBio.00080-15

TABLE 1 .

Comparison of the antimicrobial susceptibility and bacterial fitness of temporal and phylogenetic groups^a

Group (no. of isolates tested)	MIC in µg/mL			Bacterial Fitness
Group (no. of isolates tested)	Vancomycin	Teicoplanin	Daptomycin	Doubling Time (mins)
Isolates recovered during 1980s (19)	1.09	0.81	0.24	39.35
Isolates recovered after 1990 (44)	1.45	1.49	0.51	45.62
	P = 0.003	P < 0.001	P < 0.001	P < 0.001
Phylogenetic Clade 1 (38)	1.18	0.97	0.35	43.90
Phylogenetic Clade 2 (25)	1.59	1.79	0.52	43.46
	P < 0.001	P < 0.001	P = 0.021	P = 0.790
Clade 1 isolates recovered during 1980s (19)	1.09	0.81	0.24	39.35
Clade 1 isolates recovered after 1990 (19)	1.28	1.17	0.50	48.46
	P = 0.121	P = 0.057	P = 0.013	P < 0.001

^{^a}

Each value is the mean result of the respective group. P values were determined with a Welsh two-sample t test with log transformations applied to MIC data prior to comparison.