completed pre and post
bronchodilator spirometry
Figure 1– Study ﬂow diagram demonstrating the caseﬁnding and control group recruitment and allocation. ASQ¼ Asthma Screening Questionnaire;
COPD-DQ¼ COPD Diagnostic Questionnaire; CF¼ cystic ﬁbrosis; MI ¼ myocardial infarction; PRISM¼ preserved ratio impaired spirometry.
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