Table 2.

Multivariate analysis of factors associated with CBI due to SA.

	OR	CI 95%	p
Age	0.97	0.94–0.99	<0.001
Initial FEV1%	0.98	0.97–0.99	0.035
Number of lobes	1.53	1.2–1.95	<0.001
≥2 exacerbations in the previous year	2.33	1.15–4.69	0.018

OR: Odds ratio; CI: confidence interval; FEV1; Forced expiratory volume one second.