Niraparib was recently funded in Canada for the maintenance treatment of ovarian cancer following platinum-based chemotherapy. However, the drug’s safety profile in the real world remains uncertain. We conducted a cohort study to describe the patient population using niraparib and the proportion that experienced adverse events between June 2019 and December 2022 in four Canadian provinces (Ontario, Alberta, British Columbia [BC], and Quebec). We used administrative data and electronic medical records from Ontario Health, Alberta Health Services, and BC Cancer, and registry data from Exactis Innovation. We summarized baseline characteristics using descriptive statistics and reported safety outcomes using cumulative incidence. We identified 514 patients receiving niraparib. Mean age was 67 years and most were initiated on a daily dose of 100 or 200 mg/day. Grade 3/4 anemia, neutropenia, and thrombocytopenia occurred in 11–16% of the cohort. In Ontario, the three-month cumulative incidence of grade 3/4 thrombocytopenia was 11.6% (95% CI, 8.3–15.4%), neutropenia was 7.1% (95% CI, 4.6–10.4%), and anemia was 11.3% (95% CI, 8.0–15.2%). Cumulative incidences in the remaining provinces were similar. Initial daily dose and proportions of hematological adverse events were low in the real world and may be related to cautious prescribing and close monitoring by clinicians.

Chimeric antigen receptor (CAR) T-cell therapy is a new standard of care for patients with diffuse large B-cell lymphoma (DLBCL); however, studies including healthcare resource utilization (HRU) during routine care are lacking. Accordingly, a population-based study was conducted using linked administrative databases from Ontario, Canada. Patients with DLBCL that failed ≥2 lines of systemic therapy were included. Cox proportional hazard models estimated associations between covariates and overall survival (OS). Logistic, binomial and Poisson regression explored associations between covariates with toxicity and HRU. We identified 308 patients enrolled to receive CAR T-cell therapy of which 255 patients received CAR T-cells (mean age 59 years; 39% female). From the date of CAR T-cell infusion, the median OS was 25.0 months (95% CI, 21.6–28.1 months). Cytokine release syndrome and immune effector cell-associated neurotoxicity syndrome data were available for 155 patients and were reported in 135 (87.1%) and 42 (27.1%) patients, respectively. Of those that received CAR-T cells, 172 patients (67%) were hospitalized with a median length of stay of 5 days (IQR, 0–20) and 243 (95%) had an emergency department visit without hospitalization. Our prospective population-based study demonstrates comparable efficacy and safety of CAR T-cell therapy in the real-world to the pivotal trials and highlights this as an efficacious and relatively safe treatment option for patients with DLBCL in routine clinical care.