Rates of Influenza and Pneumococcal Vaccination and Correlation With Survival in Multiple Myeloma Patients

BACKGROUND

Infections are a common reason for hospitalization and death in multiple myeloma (MM). Although pneumococcal vaccination (PV) and influenza vaccination (FV) are recommended for MM patients, data on vaccination status and outcomes are limited in MM.

MATERIALS AND METHODS

We utilized data from the global, prospective, observational INSIGHT MM study to analyze FV and PV rates and associated outcomes of patients with MM enrolled 2016-2019.

RESULTS

Of the 4307 patients enrolled, 2543 and 2500 had study-entry data on FV and PV status. Overall vaccination rates were low (FV 39.6%, PV 30.2%) and varied by region. On separate multivariable analyses of overall survival (OS) by Cox model, FV in the prior 2 years and PV in the prior 5 years impacted OS (vs. no vaccination; FV: HR, 0.73; 95% CI, 0.60-0.90; P = .003; PV: HR, 0.51; 95% CI, 0.42-0.63; P < .0001) when adjusted for age, region, performance status, disease stage, cytogenetics at diagnosis, MM symptoms, disease status, time since diagnosis, and prior transplant. Proportions of deaths due to infections were lower among vaccinated versus non-vaccinated patients (FV: 9.8% vs. 15.3%, P = .142; PV: 9.9% vs. 18.0%, P = .032). Patients with FV had generally lower health resource utilization (HRU) versus patients without FV; patients with PV had higher or similar HRU versus patients without PV.

CONCLUSION

Vaccination is important in MM and should be encouraged. Vaccination status should be recorded in prospective clinical trials as it may affect survival. This trial was registered at www.

CLINICALTRIALS

gov as #NCT02761187.

Feasibility of Long-term Proteasome Inhibition in Multiple Myeloma by in-class Transition From Bortezomib to Ixazomib

BACKGROUND

The ongoing US MM-6 study is investigating in-class transition (iCT) from parenteral bortezomib-based induction to all-oral IRd (ixazomib-lenalidomide-dexamethasone) with the aim of increasing proteasome inhibitor (PI)-based treatment adherence and duration while maintaining patients' health-related quality of life (HRQoL) and improving outcomes.

PATIENTS AND METHODS

US community sites are enrolling non-transplant-eligible patients with newly diagnosed multiple myeloma (MM) with no evidence of progressive disease after 3 cycles of bortezomib-based therapy to receive IRd (up to 39 cycles or until progression or toxicity). The patients use mobile or wearable digital devices to collect actigraphy (activity and sleep) data and electronically complete HRQoL, treatment satisfaction and medication adherence questionnaires. The primary endpoint is progression-free survival. The key secondary endpoints include response rates and therapy duration.

RESULTS

At the data cutoff, 84 patients had been treated (median age 73 years; 44% aged ≥ 75 years; 49% men; 15% Black or African American; and 10% Hispanic or Latino). Of the 84 patients, 62% were continuing therapy. The mean duration of total PI therapy was 10.1 months and for the IRd regimen was 7.3 months. With an 8-month median follow-up, the 12-month progression-free survival rate was 86% (95% confidence interval, 73%-93%) from both the start of bortezomib-based treatment and the start of IRd. The overall response rate was 62% (complete response, 4%; very good partial response, 25%; partial response, 33%) after bortezomib-based induction and 70% (complete response, 26%; very good partial response, 29%; partial response, 15%) after iCT. The IRd safety profile was consistent with previous clinical trial data, and HRQoL and treatment satisfaction were maintained.

CONCLUSION

The patients included in the US MM-6 study are representative of the real-world US MM population. The use of iCT might permit prolonged PI-based therapy with promising efficacy, without impacting patients' HRQoL or treatment satisfaction.

Multiple myeloma (MM) vaccination (influenza, FV and pneumococcal, PV) rates worldwide and impact on infection, hospitalization, and death

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Background: MM is a cancer of the immune system. Infections are common reasons for hospitalization and death in MM. As MM patients (pts) are living longer, with prolonged exposure to systemic therapy, there is a need to vaccinate pts and to determine the effectiveness of these vaccines. Vaccination in MM pts is underutilized, based on a study of vaccination patterns in a large health system (Alemu JPCRR 2017) and data collected via a pt self-report online portal (Thompson ASCO 2020). We analyzed FV and PV patterns and associated outcomes in INSIGHT MM, the largest global, prospective, observational study in MM to date. Methods: INSIGHT MM aims to understand MM pt and disease characteristics at diagnosis and relapse, treatment patterns, clinical outcomes, and treatment-associated tolerability, effectiveness, quality of life, and healthcare resource utilization. INSIGHT MM has enrolled 4318 MM pts from 15 countries worldwide; pts are being followed up prospectively for ≥5 yrs. Vaccine status is collected at study entry and yearly. We analyzed FV and PV patterns and associated outcomes of pts enrolled in July 2016–2019. Results: At data cutoff (Sep 1, 2019), 2562/2523 pts had study entry data on FV/PV status. Overall vaccination rates were low (FV 40%, PV 30%) and varied by region: FV 56%/38%/27%/4% and PV 43%/28%/21%/5% in US/Europe/Latin America/Asia. In evaluable pts, lack of vaccination was associated with higher infection and hospitalization rates for FV, and with increased risk of death (univariate analysis) for both FV and PV (Table; multivariate analysis underway). Infections, including influenza and pneumonia, were the cause of death in 19% (43/226) / 8% (9/108) (P = 0.018) of pts who did not receive FV / received it in the past 2 yrs and 19% (46/236) / 9% (9/100) (P = 0.027) of pts who did not receive PV / received it in the past 5 yrs, and in 7%/15%/20%/40% of pts who died in US/ Europe/Latin America/Asia (P < 0.0001). Conclusions: Global vaccination rates in MM pts were low and varied by region. Lack of vaccination correlated with rates of infection (FV), hospitalization (FV), and death (FV and PV). Further MM datasets should be analyzed to confirm the findings. Vaccination data should be collected in prospective clinical trials as it may affect survival. Vaccination is important in MM and should be encouraged. Clinical trial information: NCT02761187 . [Table: see text]