text: Results 
  Figure 1 illustrates the results of the case ﬁnding 
  approach, including the enrollment of the control group. 
  Among 5,631 potentially eligible participants, 1,359  participants (24%) did not meet the threshold of $ 6 
  points on the ASQ or $ 20 points on the COPD- 
  Diagnostic Questionnaire and were thus excluded, 
  leaving 4,272 individuals deemed eligible for spirometry. 