1. Volume 103, Issue 6, Pages 1863-1872 (June 1993)
Chronic Obstructive Pulmonary Disease Early Intervention Trial (Lung Health Study) 
A. Sonia Buist, M.D., John E. Connett, Ph.D., R. Drew Miller, M.D., F.C.C.P., Richard E. Kanner, M.D., F.C.C.P., Gregory R. Owens, M.D., F.C.C.P., Helen T. Voelker 
CHEST 
Volume 103, Issue 6, Pages (June 1993)
DOI: /chest
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

2. Figure 1. Level of education of subjects.
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

3. Figure 2.
Average number of cigarettes smoked per day at screen 1 by age at randomization and gender.
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

4. Figure 3.
Mean FEV1 percent predicted and FEV1/ FVC percent at screen 2 by age at randomization and gender.
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

5. Figure 4.
Percent of LHS participants reporting wheezing with a cold by age (based on responses to question 10A.1 in ATS questionnaire15).
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

6. Figure 5.
Participants reporting wheezing most days or nights (based on response to question 10A.2 in ATS questionnaire15).
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

7. Figure 6.
Frequency distribution of increase in FEV1 (as percentage of baseline) in response to inhaled isoproterenol.
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions

8. Figure 7.
Cumulative percent of LHS participants with at least 20 percent decrease in FEV, in response to increasing doses of inhaled methacholine.
CHEST  , DOI: ( /chest )
Copyright © 1993 The American College of Chest Physicians Terms and Conditions