Figure 2.

Visualization of agreement between eCRF and EHR‐derived AECOPD episodes Top panel shows how FN, TP, and FP are derived for the main analysis. Bottom panel shows the same for the sensitivity analysis. Here, the first eCRF episode becomes a TP because there is an EHR episode within 15 days as an example (15‐day window shown striped in grey). Abbreviations: AECOPD, acute exacerbation of chronic obstructive pulmonary disease; eCRF, electronic case report form; EHR, electronic health record; FN, false negative; FP, false positive, TP, true positive [Colour figure can be viewed at http://wileyonlinelibrary.com]