Incidence and risk factors for bacterial infection using bortezomib, lenalidomide, and dexamethasone (RVd) in newly
Anisa Bici1, Matthew J Pianko2, Victoria R Nachar3
1Department of Pharmacy Services, Michigan Medicine and the University of Michigan College of Pharmacy, Ann Arbor, MI, USA.
Abstract:
Infections are an important cause of morbidity and mortality in newly diagnosed multiple myeloma (NDMM), but the real-world risk using modern induction regimens such as bortezomib, lenalidomide, and dexamethasone (RVd) is not well described. We performed a retrospective single-center cohort study to identify infections and risk factors in patients treated with first-line RVd from January 2014 to January 2020 and collected demographic and clinical data. Of 144 patients treated with RVd for NDMM, 21 patients (14.5%) experienced a bacterial infection during induction, of which 8 (5.5%) were grade 3 infections despite a low rate of antibiotic prophylaxis use (12%). Grade 3 neutropenia occurred in 11% of patients, 2% had febrile neutropenia and there were no deaths from infection. On multivariable analysis, age, smoking history, diabetes, antibiotic use in the 60 days preceding the start of RVd, and high-risk cytogenetics were associated with higher risk of bacterial infection.
Insights
Bacterial infections occurred in 14.5% of newly diagnosed multiple myeloma patients receiving bortezomib, lenalidomide, and dexamethasone (RVd) induction therapy. Age, smoking, diabetes, prior antibiotic use, and high-risk cytogenetics increased infection risk.
Area of Science:
- Hematology
- Oncology
- Infectious Diseases
Background:
- Infections are a significant cause of morbidity and mortality in newly diagnosed multiple myeloma (NDMM).
- The real-world risk of infection with modern induction regimens like bortezomib, lenalidomide, and dexamethasone (RVd) is not well-characterized.
- Understanding infection risks is crucial for optimizing treatment strategies in NDMM.
Purpose of the Study:
- To identify the incidence of bacterial infections during first-line RVd induction therapy for NDMM.
- To determine risk factors associated with bacterial infections in this patient population.
- To evaluate the severity and outcomes of infections in patients treated with RVd.
Main Methods:
- Retrospective single-center cohort study.
- Inclusion of 144 patients with NDMM treated with first-line RVd from January 2014 to January 2020.
- Collection of demographic and clinical data to identify infections and risk factors.
Main Results:
- 21 patients (14.5%) experienced bacterial infections during RVd induction.
- 8 patients (5.5%) had grade 3 infections, despite low antibiotic prophylaxis use (12%).
- Multivariable analysis identified age, smoking history, diabetes, recent antibiotic use, and high-risk cytogenetics as significant risk factors for infection.
Conclusions:
- Bacterial infections are a notable concern in NDMM patients undergoing RVd induction.
- Specific patient characteristics and prior treatments are associated with an increased risk of infection.
- Further research into prophylactic strategies and risk stratification may improve outcomes.
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