Table 3.

Cox proportional hazards model

	Independent risk factors for an exacerbation	Odds ratio	p value
Day 14	Asthma	3.16 (95% 1.02–9.79)	0.047
Day 365	Mild bronchiectasis	0.34 (95% 0.12–0.95)	0.039
	14-days treatment	1.94 (95% 1.19–3.16)	0.008