Table 5.

Construction of logistic model

Variable	β	S.E	Wald	P	OR	95% CI
						Lower	Upper
Intercept	− 2.551	0.925	7.600	0.006
Age	− 0.015	0.013	1.245	0.265	0.985	0.961	1.011
Gender
Male	Ref
Female	0.063	0.253	0.062	0.803	1.065	0.649	1.749
Acute exacerbation in previous 1 year
No	Ref
Yes	1.351	0.254	28.364	< 0.001	3.863	2.349	6.351
LABA
No	Ref
Yes	1.715	0.643	7.121	0.008	5.556	1.577	19.577
ICS
No	Ref
Yes	− 1.398	0.664	4.433	0.035	0.247	0.067	0.908
ALT	− 0.010	0.009	1.462	0.227	0.990	0.973	1.006
CAT Score	0.105	0.026	16.177	< 0.001	1.110	1.055	1.168

LABA long-acting β agonist, ICS inhaled corticosteroids, ALT glutamic-pyruvic transaminase, CAT COPD assessment test