Retrospective Assessment of Chemotherapy/Biotherapy Toxicity in a Hispanic/Latinx Population Versus Published Study Population


Introduction: Eskenazi Health in Indianapolis, Indiana, USA. services diverse communities in Central Indiana, including the Hispanic/Latinx community. It has been postulated that this population experiences toxicities at a higher rate and with a faster onset than the general population when treated with chemotherapy or biotherapy. The published clinical trials that have evaluated chemotherapy/biotherapy efficacy and toxicity have not adequately represented the Hispanic/Latinx population. This retrospective analysis aims to analyze the incidence and severity of adverse drug events in the Hispanic/Latinx population compared to the general study population.

Methods: A retrospective chart review included patients reported as Hispanic/Latinx in the electronic medical record who had breast cancer, colon cancer, acute myeloid leukemia, or multiple myeloma currently receiving chemotherapy/biotherapy and/or received chemotherapy/biotherapy during the study period. Seventy-three instances of patients receiving chemotherapy/biotherapy and 46 unique patients were included in the final analysis.

Results: Of the 73 instances, 29 (40%) had toxicity at baseline prior to chemotherapy/biotherapy received during the study period. Of those 29 baseline toxicities, 26 (90%) of them had new toxicity during the study period. Of the 73 instances, 62 (85%) experienced toxicities during the study period.

Conclusion: Ethnicity has a proven effect on medication efficacy and safety, but the specific impact of ethnicity on chemotherapy/biotherapy toxicity risk has not been well elucidated. This study found that a majority (85%) of Hispanic/Latinx patients treated with chemotherapy/biotherapy experienced toxicity of any grade, and the majority (90%) patients who had prior toxicity experienced another toxicity.