CRP and chronic obstructive pulmonary disease: In COPD patients, RDW levels also correlated positively with CRP levels (r=0.27, p<0.01), albumin levels (r=0.23, p=0.04), right ventricular dysfunction (RVD) (r=0.24, p=0.01), pulmonary arterial hypertension (r=0.1, p=0.02), and cardiovascular disease (CVD) (r=0.24, p=0.02).