Table 3.

Linear regression analysis of haptoglobin phenotypes in the participants.

Variables	HP1-1			HP2-1			HP2-2
	B	t	p	B	t	p	B	t	p
Gender	−71.61	−1.24	0.245	−33.48	−0.8	0.428	−155.7	−6.22	<0.001
Smoke status	−49.93	0.52	1.54	−37.58	−1.46	0.152	−21.29	−1.35	0.182
FEV1, %	−2.35	−2.93	0.026	−1.54	−2.46	0.019	−1.89	−1.1	<0.001
IL-6, pg/ml	7.25	2.9	0.027	8.41	3.61	0.002	11.93	4.8	<0.001
8-isoprostane, pg/ml	2.08	19.62	0.032	1.29	2.37	0.032	0.1	0.39	0.708

Abbreviations: FEV₁, Forced expiratory volume in first second; IL-6, interleukin-6; CRP, C-Reactive Protein.