Association Between the Neutrophil-to-Lymphocyte Ratio and Infection and Survival in Diffuse Large B Cell Lymphoma

Background/Aim: Infection is a common cause of morbidity and mortality in patients treated for diffuse large B -cell lymphoma (DLBCL). However, there is limited information on the impact and risk factors for infection among patients receiving rituximab, cyclophosphamide, vincristine, doxorubicin, and prednisolone (R-CHOP). Patients and Methods: A retrospective study evaluating patients with DLBCL receiving R -CHOP and R-COP between 2004 and 2021 was conducted at a medical center. Hospital patients' records for the five-item modified frailty index (mFI-5), sarcopenia, blood-based inflammatory markers, and clinical outcomes were statistically analyzed. Results: Patients with frailty, sarcopenia, and high neutrophil-to-lymphocyte ratio (NLR) were associated with a higher risk of infections. The revised International Prognostic Index poor-risk group, high NLR, infections, and treatment modality were risk factors for shorter progression-free and overall survival. Conclusion: Pre-treatment high NLR was a predictor of infection and survival outcome in DLBCL patients.