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Racial and Socioeconomic Treatment Disparities in Adolescents and Young Adults with Stage II-III Rectal Cancer.
Annals of Surgical Oncology 2017 Februrary
INTRODUCTION: Stage II-III rectal cancer requires multidisciplinary cancer care, and adolescents and young adults (AYA, ages 15-39 years) often do not receive optimal cancer therapy.
METHODS: Overall, 3295 AYAs with clinical stage II-III rectal cancer were identified in the National Cancer Database. Factors associated with the receipt of adjuvant and surgical therapies, as well as overall survival (OS), were examined.
RESULTS: The majority of patients were non-Hispanic White (72.0 %), male (57.5 %), and without comorbidities (93.8 %). A greater proportion of Black and Hispanic patients did not receive radiation (24.5 and 27.1 %, respectively, vs. 16.5 % for non-Hispanic White patients), surgery (22.4 % and 21.6 vs. 12.3 %), or chemotherapy (21.5 % and 24.1 vs. 14.7 %) compared with non-Hispanic White patients (all p < 0.05). After controlling for competing factors, Black (odds ratio [OR] 0.7, 95 % confidence interval [CI] 0.5-0.9) and Hispanic patients (OR 0.6, 95 % CI 0.4-0.9) were less likely to receive neoadjuvant chemoradiation compared with non-Hispanic White patients. Females, the uninsured, and those treated at a community cancer center were also less likely to receive neoadjuvant therapy. Having government insurance (OR 0.22, 95 % CI 010-0.49) was a predictor for not receiving surgery. Although 5-year OS was lower (p < 0.05) in Black (59.8 %) and Hispanic patients (65.9 %) compared with non-Hispanic White patients (74.9 %), on multivariate analysis race did not impact mortality. Not having surgery (hazard ratio [HR] 7.1, 95 % CI 2.8-18.2) had the greatest influence on mortality, followed by poorly differentiated histology (HR 3.0, 95 % CI 1.3-6.5), nodal positivity (HR 2.6, 95 % CI 1.9-3.6), no chemotherapy (HR 1.9, 95 % CI 1.03-3.6), no insurance (HR 1.7, 95 % CI 1.1-2.7), and male sex (HR 1.5, 95 % CI 1.1-2.0).
CONCLUSION: There are racial and socioeconomic disparities in the treatment of stage II-III rectal cancer in AYAs, many of which impact OS. Interventions that can address and mitigate these differences may lead to improvements in OS for some patients.
METHODS: Overall, 3295 AYAs with clinical stage II-III rectal cancer were identified in the National Cancer Database. Factors associated with the receipt of adjuvant and surgical therapies, as well as overall survival (OS), were examined.
RESULTS: The majority of patients were non-Hispanic White (72.0 %), male (57.5 %), and without comorbidities (93.8 %). A greater proportion of Black and Hispanic patients did not receive radiation (24.5 and 27.1 %, respectively, vs. 16.5 % for non-Hispanic White patients), surgery (22.4 % and 21.6 vs. 12.3 %), or chemotherapy (21.5 % and 24.1 vs. 14.7 %) compared with non-Hispanic White patients (all p < 0.05). After controlling for competing factors, Black (odds ratio [OR] 0.7, 95 % confidence interval [CI] 0.5-0.9) and Hispanic patients (OR 0.6, 95 % CI 0.4-0.9) were less likely to receive neoadjuvant chemoradiation compared with non-Hispanic White patients. Females, the uninsured, and those treated at a community cancer center were also less likely to receive neoadjuvant therapy. Having government insurance (OR 0.22, 95 % CI 010-0.49) was a predictor for not receiving surgery. Although 5-year OS was lower (p < 0.05) in Black (59.8 %) and Hispanic patients (65.9 %) compared with non-Hispanic White patients (74.9 %), on multivariate analysis race did not impact mortality. Not having surgery (hazard ratio [HR] 7.1, 95 % CI 2.8-18.2) had the greatest influence on mortality, followed by poorly differentiated histology (HR 3.0, 95 % CI 1.3-6.5), nodal positivity (HR 2.6, 95 % CI 1.9-3.6), no chemotherapy (HR 1.9, 95 % CI 1.03-3.6), no insurance (HR 1.7, 95 % CI 1.1-2.7), and male sex (HR 1.5, 95 % CI 1.1-2.0).
CONCLUSION: There are racial and socioeconomic disparities in the treatment of stage II-III rectal cancer in AYAs, many of which impact OS. Interventions that can address and mitigate these differences may lead to improvements in OS for some patients.
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