Session: 905. Outcomes Research—Malignant Conditions (Lymphoid Disease): Poster III
Hematology Disease Topics & Pathways:
Adult, Diseases, Lymphoma (any), Non-Hodgkin Lymphoma, Study Population, Lymphoid Malignancies, Clinically relevant
Methods: Using the Manitoba Cancer Registry we identified patients aged over 18 years with NHL diagnosed from 2004-2015. We limited the cohort to aggressive NHL types using morphology codes. Data on demographics, stage, NHL type, comorbidities, polypharmacy, and chemotherapy were obtained from population-based provincial databases. Comorbidity was measured using Johns Hopkins ACG System software, which factored in all measured hospital-based and outpatient medical services utilized and collapsed them into one of six Resource Utilization Band (RUB) categories, from no use to very high user. Overall survival (OS) was calculated using Kaplan–Meier curves. Cox proportional hazards regression models were constructed to determine the interaction of age with a variety of factors. Multi-variable logistic regression was also used to examine the receipt of chemotherapy and the interaction with age.
Results: In our cohort of 1,073 patients with aggressive NHL, 704 were treated with systemic chemotherapy. Treatment rates decreased with increasing age and medication count, while stage and comorbidity had little impact (Table 1). Median OS decreased with age among treated patients and was very short without chemotherapy (Table 1). Multivariate analyses found that individuals with increasing age, stage III, unknown stage, histology other than DLBCL, and higher medication counts were less likely to receive chemotherapy. For the receipt of chemotherapy, no age interactions were found. In addition, in patients who received chemotherapy, increased age and stage were associated with poorer survival, while more recent year of diagnosis improved survival. No age interactions with a substantial impact on survival were found.
Conclusions: OS in aggressive NHL diminishes with increasing age, but is longer in those receiving chemotherapy across all age groups. Comorbidity and medication count influenced the receipt of chemotherapy and OS. Higher medication count was only independently associated with less likelihood of receiving chemotherapy, while comorbidity was not independent of other factors for either receipt of chemotherapy or OS.
Disclosures: Dawe: AstraZeneca Canada: Research Funding; AstraZeneca Canada: Membership on an entity's Board of Directors or advisory committees; Boehringer-Ingelheim: Honoraria; Merck Canada: Membership on an entity's Board of Directors or advisory committees.
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