Table 6.

Multivariate analysis for different COPD exacerbation statuses with a 2-year follow-up

Variables	Degree of exacerbation
	Mild Exacerbators		Moderate Exacerbators		Severe Exacerbators
	Odds Ratio (95% CI)	P value	Odds Ratio (95% CI)	P value	Odds Ratio (95% CI)	P value
Home oxygen therapy	2.12(0.60,7.48)	0.24	0.55(0.06,5.45)	0.61	2.71(1.12,6.57)	0.03
SGRQ score	1.04(0.99,1.10)	0.13	1.05(0.98,1.13)	0.15	1.01(0.97,1.05)	0.66
mMRC score	0.99(0.41,2.38)	0.98	0.44(0.11,1.81)	0.26	1.13(0.61,2.08)	0.70
CAT score	0.89(0.77,1.03)	0.12	0.93(0.76,1.12)	0.43	0.99(0.89,1.10)	0.81
COPD-related exacerbation within the previous year	0.80(0.36,1.76)	0.58	1.43(0.61,3.32)	0.41	1.71(1.10,2.65)	0.02

Multiple logistic regression was used

OR odds ratio, CI confidence interval, Max maximum, Min minimum, COPD chronic obstructive pulmonary disease, SGRQ St George's respiratory questionnaire, mMRC modified medical research council, CAT chronic obstructive pulmonary disease assessment test