Table 4.

Multivariate analysis of the clinical characteristics in COPD patients with frequent exacerbation versus those with infrequent exacerbation

	Multivariate analysis
	Adjusted OR or β	95% CI	p value
Critical exacerbation	6.07	1.06–34.67	0.04
Blood eosinophil (%)	1.45	1.12–1.88	< 0.01
%FEV1.0 (%)	0.3	0.01–7.01	0.46
Mechanical ventilation use	5.49	1.19–25.19	0.03
Long-term oxygen therapy	1.69	0.41–6.96	0.47
Macrolide	2.28	0.59–8.82	0.23
BMI	0.91	0.75–1.12	0.38
CO2 retention	1.16	0.23–5.83	0.85

OR odds ratio, β standardized β value, CI confidence interval, BMI body mass index