Table 4. Prevalence of seven genetic islands in COPD NTHi isolates from patients with and without exacerbations.

Island	Isolates from COPD patients without exacerbations (n = 37)	Isolates from COPD patients with exacerbations (n = 64)	PR*	P value
G1	10(27.0)	15(25.8)	0.87	0.6871
G2	16(43.2)	26(40.6)	0.94	0.797
G6	37(100)	61(95.3)	0.97	0.3714
G8	28(75.7)	49(76.6)	1.01	0.9196
G9	33(89.2)	53(82.8)	0.95	0.5417
G10	18(48.6)	35(54.7)	1.12	0.5582
G11	1(2.7)	7(10.9)	4.04	0.2713

^*PR  =  prevalence ratio.