TABLE 2.

PREVALENCE OF RESTRICTIVE ABNORMALITIES IN GLOBAL INITIATIVE FOR OBSTRUCTIVE LUNG DISEASE–UNCLASSIFIED SUBJECTS, SMOKING CONTROL SUBJECTS, AND SUBJECTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE

	GOLD-U Subjects	Smoking Control Subjects	Subjects with COPD
TLC,* L	4.5 (1.1)	5.3 (1.3)†	6.0 (1.4)†
TLC, % predicted	79.4 (13)	93.3 (15.1)†	102.6 (16.8)†
FVC < 80% predicted, % of subjects	88.6	6.0†	57.9†
TLC < 80% predicted, % of subjects	56.3	17.8†	9.0†
TLC < LLN, % of subjects	45.5	13.8†	7.2†

Definition of abbreviations: COPD = chronic obstructive pulmonary disease; GOLD-U = Global Initiative for Obstructive Lung Disease–Unclassified; TLC = total lung capacity.

Data are presented as mean (SD) or percent.

^*Based on chest CT measurements.

^†Denotes P value < 0.05 when compared with GOLD-U subjects.