Table 1. Data sources for each dimension of RE-AIM.

Data sources	RE-AIM dimension	Procedure
Centers for Disease Control and Prevention Report 17	Reach	Extract age, gender, race, and ethnicity data from the report
HealthIT.gov 18 and Epic data sheet 19	Reach	Obtain market share of Epic EHR to inform generalizability of CT CDS tool
Published data from the PECARN implementation trial 6	Reach, Efficacy/Effectiveness	Extract age, gender, race, and ethnicity data; Summarize primary study results
Semistructured postimplementation trial interviews	Adoption, Implementation, Maintenance	Develop semistructured interview guide; Conduct 38 interviews at 6 study sites
Supplemental tables from PECARN implementation trial 6	Adoption	Extract user-specific adoption information

Abbreviations: CDS, clinical decision support; CT, computed tomography; EHR, electronic health record; PECARN, Pediatric Emergency Care Applied Research Network; RE-AIM, Reach, Efficacy, Adoption, Implementation, and Maintenance.