Table 6.

Cumulative frequency of isolates (as%) showing NWT phenotypes for multiple antimicrobial classes.

Number of NWT phenotype for different antimicrobial groups.	2009/11		2013/14		2009/11 vs 2013/14		CC vs NCC
	CC n = 93	NCC n = 66	CC n = 117	NCC n = 129	in CC	in NCC	in 2009/11	in 2013/14
≥1	100%	100%	100%	100%	ns	ns	ns	ns
≥2	98%	95%	99%	94%	ns	ns	ns	ns
≥3	63%	88%	85%	81%	P = 0.0004	ns	P = 0.0006	ns
≥4	56%	67%	66%	77%	ns	ns	ns	ns
≥5	16%	41%	30%	45%	P = 0.020	ns	P = 0.0005	P = 0.015
≥6	6%	30%	21%	32%	P = 0.004	ns	P = 0.00006	P = 0.007
≥7	4%	15%	15%	20%	P = 0.009	ns	P = 0.017	ns
8	2%	2%	8%	0%	ns	ns	ns	P = 0.001

Note: ten groups of antimicrobials were considered beta-lactams (penams and cephalosporins), macrolides, lincosamides, tetracyclines, aminoglycosides, pleuromutilins, amphenicols, fluoroquinolones and the combination of Trimethoprim/Sulfamethoxazole. Statistics performed with Pearson’s chi-squared test or Fisher’s exact test when expected frequency were lower than 5.

ns: no significant difference (p > 0.05).