Table 4.

Inclusion criteria for CTPA studies at each institution.

Institution	Inclusion criteria
1. CCHS	Any study description that included “PE”
2. CSMC	Any protocol name that included “PE”/“P.E”/“Pulmonary embolism”
3. PHHS	Any study description that included “Angio* Chest”
4. UCM	Any study description that included “PE”/“Pulmonary embolism”
5. UCSD	All cases with the study description “CTA PULMONARY EMBOLUS”
6. UMass	Any procedure description that included “PE”/“Pulmonary emb”/“ CT ANGIOGRAM CHEST W”
7. UMHC	Any study description that included “PE”/“CT pulmonary angiogram”
8. URMC	All cases with the procedure description “CT ANGIO CHEST”
9. UTMB	Any procedure description that included “PE”/“Pulmonary emb”/“Angio* Chest”
10. UTSW	Any study description that included “Angio* Chest”
11. UOWI	Any procedure description that included “PE”/“P.E.”/“Pulmonary emb”/“Angio* Chest”/“CTA CHEST”
12. Wake Forest	Any procedure description that included “PE”
13. Yale	Any study description that included “PE”/“Pulmonary emb”