What the HEC? Physician variation and attainable compliance targets in antiemetic prophylaxis.
74 Background: U.S. National Antiemetic Guidelines recommend upfront triple prophylaxis (NK1 receptor antagonist (RA) + 5HT3 RA + dexamethasone) for patients receiving highly emetogenic chemotherapy (HEC), including carboplatin AUC ≥ 4 per 2017 guidelines. While existing data show gaps in guideline compliance, variation between individual physicians is less studied, and a realistic target compliance rate remains unknown. Methods: In a large electronic health record database (IBM Explorys), we identified HEC courses of therapy initiated from 2012 to 2017. Guideline compliance was defined as triple prophylaxis at chemotherapy initiation. Patient courses for ≥ 7 day cycles of cisplatin or anthracycline + cyclophosphamide (AC), or carboplatin (≥ 14 day cycles as a proxy for AUC ≥ 4) were ascribed to oncologists based on encounter frequency. We then ranked physicians treating ≥ 5 HEC courses and evaluated guideline compliance and individual physician variation. Results: In total, 10,074 HEC courses were identified and attributed to 451 unique physicians. Overall antiemetic guideline compliance with cisplatin and AC averaged 68% and 81% respectively. When ranked by compliance, the top 20% of physicians were 2.5 - 1.5 times as compliant as the bottom 20% (cisplatin 100% vs 40%; AC 100% vs 67%). For cisplatin, 32% of physicians had > 90% compliance; the remaining 68% were evenly distributed from 0 - 90%. For AC, 56% of physicians had > 90% compliance, and another 14% had 80 - 90%; the remaining 30% were evenly distributed. For carboplatin, 62% of physicians had ≤ 10% compliance, and another 17% had 11 - 20%; however, the majority of these data preceded guideline inclusion of carboplatin AUC ≥ 4 as HEC. Rates were independent of course volume per physician. Conclusions: Considerable physician-level variation exists in triple antiemetic prophylaxis guideline adherence for HEC. Hundreds of physicians had > 90% compliance with guidelines, suggesting 90% is a realistic target. However, the majority exhibited substantial gaps in NK1 RA use in HEC, placing patients unnecessarily at risk for CINV. Interventions are needed to bolster triple antiemetic prophylaxis in HEC, perhaps especially for carboplatin.
Roeland, E; Ruddy, KJ; LeBlanc, TW; Nipp, RD; Binder, G; Sebastiani, S; Potluri, RC; Schmerold, LM; Papademetriou, E; Navari, RM
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