Table 2.

Spearman’s correlation coefficients for total haptoglobin and haptoglobin phenotype concentrations and systemic inflammatory cytokines.

Variables	Total haptoglobin	Haptoglobin phenotype
		Hp1-1	Hp2-1	Hp2-2
Age, years	0.076	−0.293	−0.157	0.353*
Gendera	−0.378**	−0.523	−0.109	−0.632**
BMI, kg/m2	−0.004	0.097	0.161	−0.074
Smoke status	−0.16	0.582	−0.171	−0.182
Steroid treatment	0.086	0.289	0.154	0.027
FEV1, %	−0.499	−0.559	−0.347*	−0.555***
IL-6, pg/mla	0.671**	0.435	0.570**	0.786**
CRP, mg/dlb	0.148	−0.182	0.166	0.139
8-isoprostane, pg/mlc	0.389**	0.648	0.560*	0.21

Notes: ^an = 63; ^bn = 97; ^cn = 56;

Abbreviations: BMI, Body mass index; FEV₁, Force expiratory volume in first second; IL-6, Interleukin-6;

CRP, C-Reactive Protein; Hp, haptoglobin.