The role of non-oncology specialties in the real world longitudinal journey of prostate cancer patients.
e19255 Background: Electronic health records (EHRs) are increasingly being recognized by regulators and researchers as reliable sources of evidence. It is therefore critical that real world evidence databases accurately reflect all diagnostics and interventions that could affect patient outcomes. Some of the commercially available datasets source data solely from oncology clinics, which may not reflect patients’ full care journey. This analysis assessed the contribution of non-oncology specialties to prostate cancer care. Methods: Newly diagnosed prostate cancer patients with encounters between Jan 2014 to Dec 2017 were analyzed from the deidentified Optum Electronic Health Record Data Repository. Diagnostic procedures 6 months prior to the index date (first diagnosis date within the study period) and 1 year post index date were identified. Attending physician specialties were identified. All treatment related encounters up to 1 year post the index dates were mapped by specialty. Codes were verified by certified medical professional. Results: A total of 186,299 prostate cancer patients were identified between Jan 2014 to Dec 2017. In the 6 months prior to index date, biopsy was most commonly ordered by urologists (70%), followed by surgical specialists (14%). Biomarker tests were ordered mostly by general practitioners (40%) followed by urologists (18%). The trend was similar for 1 year post biopsy and other histology procedures. Interestingly, a large portion of treatment encounters was observed outside oncology: 48% of surgical management by urologists (48%), chemotherapy was prescribed by both oncologists (27%) and urologists (31%) in a similar ratio, while radiotherapy was performed predominantly by radiation oncologists (81%). Conclusions: In prostate cancer, a large proportion of care encounters occur outside oncology specialties, with urology conducting a significant proportion of diagnostic testing and early treatment. Restricting source data to oncology specialties may omit key factors affecting patients’ outcomes, therefore data for such studies should reflect the entire care continuum.