Table 1.

Baseline Characteristics of Patients with COPD and Control Subjects

Variables	Healthy Control Subjects (n=102)	Patients with COPD (n=163)	P value
Age (years)	64.8 (60.1–72.1)	65.2 (60.9–72.6)	0.753
Sex (male/female)	48/54	77/86	0.844
VCAM-1 (ng/mL)	733.2±226.5	1034.6±345.1	<0.001

Notes: Data are presented as mean ± SD for normally distributed data and as median (interquartile range) for nonnormally distributed data.

Abbreviations: COPD, chronic obstructive pulmonary disease; VCAM-1, vascular cell adhesion molecule-1.