Figure 1
From: Circadian Changes in the Sputum of Asthmatic Subjects and Healthy Controls
Difference in logs between the morning and evening sputum TCCs plotted against the mean morning evening values (Bland and Altman plot). Open symbols represent controls, and the solid ones, asthmatic subject samples. The dashed lines are delineating an area of 2 SDs above and below the ''no-difference zero line'' of the morning-evening differences.