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Figure 2 | Clinical and Translational Allergy

Figure 2

From: Operational definitions of asthma in recent epidemiological studies are inconsistent

Figure 2

Elements of the definitions of “Current asthma” connected in the order established by each studies. Symptoms in the last 12 months are represented in blue, lung function tests in orange and physician diagnosis in green. The size of each element is proportional to the number of definitions using the element. The color of the lines indicates the number of times each connection was used: once (blue), twice (pink), three times (purple), four to eight times (red) and more than ten times (black). To simplify the diagram, breathlessness and dyspnea were considered the same.

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