Table 2 : The predictors of presence of MAB in all subjects

	Presence of MAB		Presence of MAB		Presence of MAB
	p values		p values		p values
Age	0.003	Age	0.02	Age	0.007
Sex	0.4	Sex	0.3	Sex	0.3
Smoke p/y	0.7	Smoke p/y	0.9	Smoke p/y	0.7
Severity of COPD	0.04	BODE index	0.02	PO2	0.003

Statistical significance p<0.05 BMI: Body mass index COPD: Chronic obstructive pulmonary disease