Table 4. Simple correlation and multiple stepwise linear regression analysis of risk factors associated with cIMT.

	Simple		Stepwise†		Stepwise‡		Stepwise§
	r	p-value	β	p-value	β	p-value	β	p-value
FVC (% pred)	−0.15	<0.0001	−0.03	0.02	−	−	−	−
FEV1 (% pred)	−0.14	<0.0001	−	−	−0.07	<0.0001	−	−
FEV1/FVC ratio	−0.15	<0.0001	−	−	−	−	−0.08	<0.0001
Age (years)	0.45	<0.0001	0.36	<0.0001	0.36	<0.0001	0.35	<0.0001
Gender (male  =  1, female  =  0)	−0.24	<0.0001	−0.20	<0.0001	−0.19	<0.0001	−0.21	<0.0001
Current smoker (yes  =  1, no  =  0)	0.13	<0.0001	0.05	<0.0001	0.05	<0.0001	0.06	<0.0001
BMI (kg/m2)	0.13	<0.0001	0.07	<0.0001	0.07	<0.0001	0.08	<0.0001
SBP (mmHg)	0.26	<0.0001	0.14	<0.0001	0.14	<0.0001	0.15	<0.0001
DBP (mmHg)	0.03	0.005	−0.09	<0.0001	−00.1	<0.0001	−0.09	<0.0001
TG (mmol/L)*	0.054	<0.0001	−0.03	0.156	−0.03	0.17	−0.02	0.57
TC (mmol/L)	0.10	<0.0001	0.001	0.980	0.000	1.00	0.002	0.94
LDL-c (mmol/L)	0.09	<0.0001	0.12	<.0001	0.12	<0.0001	0.114	<0.0001
HDL-c (mmol/L)	−0.053	<0.0001	−0.03	0.05	−0.03	0.05	−0.03	0.05
HOMA-IR*	0.07	<0.0001	0.02	0.08	0.02	0.10	0.003	0.05

r, correlation coefficient; β, regression coefficient; SE, standard error. *: log-transfer. †: FVC (% pred) involved. ‡: FEV1 (% pred).

^§: FEV1/FVC ratio involved.