Table 2. Microbiological characteristics of the study population.

Microorganism		"Never" (n = 303)	"Pyo" (n = 1,827)	OR [95% CI]	p-value
H. influenzae
	No	205 (67.7%)	1467 (80.3%)	1	-
	Yes	98 (32.3%)	360 (19.7%)	1.95 [1.49–2.54]	< 0.001
S. pneumoniae
	No	294 (97%)	1796 (98.3%)	1	-
	Yes	9 (3%)	31 (1.7%)	1.77 [0.84–3.76]	0.14
S. aureus
	No	74 (24.4%)	514 (28.1%)	1	-
	Yes	229 (75.6%)	1313 (71.9%)	1.21 [0.91–1.6]	0.18
S. maltophilia
	No	279 (92.1%)	1522 (83.3%)	2.33 [1.51–3.60]	< 0.001
	Yes	24 (7.9%)	305 (16.7%)	1	-
B. cepacia
	No	292 (96.4%)	1746 (95.6%)	1.23 [0.65–2.34]	0.53
	Yes	11 (3.6%)	81 (4.4%)	1	-
Aspergillus spp
	No	198 (65.3%)	843 (46.1%)	2.20 [1.71–2.84]	< 0.001
	Yes	105 (34.7%)	984 (53.5%)	1	-
A. xylosoxidans
	No	290 (95.7%)	1636 (89.5%)	2.60 [1.46–4.63]	0.001
	Yes	13 (4.3%)	191 (10.5%)	1	-

Values are expressed as n (%).