. Author manuscript; available in PMC: 2018 Apr 1.

Published in final edited form as: Acad Radiol. 2016 Dec 8;24(4):386–392. doi: 10.1016/j.acra.2016.10.011

Table 2.

Characteristics of the subjects in the baseline by GOLD stage

	GOLD STAGE
Characteristic	0 (N= 4,047)		1 (N=747)		2 (N=1,786)		3 (N=1,042)		4 (N=534)
Age, y	57	± 8	62	± 9	63	± 9	64	± 8	64	± 8
Male gender, %	53		58		54		58		59
African-American race, %	41		22		24		20		18
Height, cm	170	± 9	170	± 10	170	± 9	170	± 9	170	± 9
Weight, kg	84	± 18	78	± 16	83	± 20	81	± 20	73	± 18
Pack-years of smoking	37	± 20	45	± 24	51	± 27	55	± 27	57	± 29
Current smoking status, %	59		55		49		36		23
FEV₁, L	2.9	± 0.7	2.7	± 0.7	1.9	± 0.5	1.2	± 0.3	0.7	± 0.2
FEV₁, % predicted	98	± 12	91	± 9	65	± 8	40	± 6	23	± 5
FVC, L	3.7	± 0.9	4.1	± 1.0	3.2	± 0.9	2.7	± 0.8	2.1	± 0.7
FVC, % predicted	97	± 12	108	± 12	86	± 13	71	± 13	56	± 14
FEV₁/FVC ratio	0.79	± 0.05	0.65	± 0.04	0.58	± 0.08	0.44	± 0.09	0.32	± 0.07
One or more acute respiratory disease episode in the prior yr to enrollment, %	9		12		30		43		57

Data are presented as mean ± SD or proportion (%)