Obesity, comorbidities, and treatment selection in Black and White women with early breast cancer
Menée aux Etats-Unis à partir de données portant sur 548 patientes atteintes d'un cancer du sein de stade précoce (26 % de patientes afro-américaines, 74 % de patientes de type caucasien), cette étude rétrospective analyse les disparités ethniques dans l'association entre la présence d'une obésité, des comorbidités et les décisions relatives au choix des traitements
Background : This study investigates obesity and comorbidity in Black and White women with early breast cancer (stages I‐III) and their potential impact on treatment decisions for patients with hormone receptor–positive (HR+)/human epidermal growth factor receptor 2–negative (HER2–) tumors.
Methods : In this retrospective chart review, comparisons of frequencies for Black and White patients were calculated with the Fisher exact test. Log binomial regression was used to estimate prevalence ratios (PRs) with 95% confidence intervals for total and individual comorbidities, and multivariable modeling was used to estimate PRs adjusted for age and body mass index (BMI).
Results : In a sample of 548 patients, 26% were Black, and 74% were White. Sixty‐two percent of Black patients and 32% of White patients were obese (BMI ≥ 30 kg/m2; P < .0001). Seventy‐five percent of Black patients and 87% of White patients had HR+ tumors (P = .001). Significant intergroup differences were seen for 2 or more total comorbidities (62% of Blacks vs 47% of Whites; P = .001), 2 or more obesity‐related comorbidities (33% vs 10%; P < .0001), hypertension (60% vs 32%; P < .0001), diabetes mellitus (23% vs 6%; P < .0001), hypercholesterolemia or hyperlipidemia (28% vs 18%; P = .02), and hypothyroidism (4% vs 11%; P = .012). In women with HR+/HER2– tumors, there were no intergroup differences in treatment decisions regarding the type of surgery, chemotherapy regimen, radiation, or endocrine treatment despite significant differences in the prevalence of obesity and comorbidities.
Conclusions : This study documents significant disparities between Black and White women with early breast cancer with regard to high rates of obesity, overall comorbidities, and obesity‐related comorbidities, and it highlights the prevalence of competing risks that may complicate outcomes in breast cancer.
Cancer , résumé, 2019