Figure 3. Natural language queries used to search clinical reports.

†We recognize that, clinically, breast pain is distinct from chest pain; however, this study focuses on the patient presentation of symptoms. Thus including “breast pain” as a search term is motivated by the desire to capture clinician’s quoting of the patient as in the following real example: “I suspect that the patient’s breast pain is actually due to significant chest wall pain ...” In our sample, there were only 15 instances of breast pain; therefore, inclusion or exclusion of this term would not significantly affect the conclusions of this study.