Introduction
Studies suggest that patients with cancer are more likely to experience severe outcomes from COVID-19. Therefore, cancer centers have undertaken efforts to care for patients with cancer in COVID-free units. Nevertheless, the frequency and relevance of nosocomial transmission of COVID-19 in patients with cancer remain unknown. The goal of this study was to determine the incidence and impact of hospital-acquired COVID-19 in this population and identify predictive factors for COVID-19 severity in patients with cancer.
Methods
Patients with cancer and a laboratory-confirmed diagnosis of COVID-19 were prospectively identified using provincial registries and hospital databases between March 3
rd
and May 23
rd
, 2020 in the provinces of Quebec and British Columbia in Canada. Patient’s baseline characteristics including age, sex, comorbidities, cancer type, and type of anti-cancer treatment were collected. The exposure of interest was incidence of hospital-acquired infection defined by diagnosis of SARS-CoV-2 ≥ 5 days after hospital admission for COVID-unrelated cause. Co-primary outcomes were death or composite outcomes of severe illness from COVID-19 such as hospitalization, supplemental oxygen, intensive-care unit (ICU) admission and/or mechanical ventilation.
Results
A total of 252 patients (N=249 adult, and N=3 pediatric) with COVID-19 and cancer were identified, and the majority were residents of Quebec (N=233). One-hundred-and-six patients (42.1%) received active anti-cancer treatment in the last 3 months prior to COVID-19 diagnosis. During a median follow-up of 25 days, 33 (13.1%) required admission to the ICU, and 71 (28.2%) died. Forty-seven (19.1%) had a diagnosis of hospital-acquired COVID-19. Median overall survival was shorter in those with hospital-acquired infection, compared to a contemporary community-acquired population (27 days vs unreached, HR 2.3, 95% CI 1.2-4.4, p=0.0006). Multivariate analysis demonstrated that hospital-acquired COVID-19, age, ECOG status, and advanced stage of cancer were independently associated with death.
Interpretation
Our study demonstrates a high rate of nosocomial transmission of COVID-19, associated with increased mortality in both univariate and multivariate analysis in the cancer population, reinforcing the importance of treating patients with cancer in COVID-free units. We also validated that age and advanced cancer were negative predictive factors for COVID-19 severity in patients with cancer.
Background
Many clinical trials supporting new drug applications underrepresent minority patients. Trials conducted by the National Cancer Institute’s National Clinical Trial’s Network (NCTN) have greater outreach to community sites, potentially allowing better representation. We compared the representation of Black patients in pharmaceutical company–sponsored cancer clinical trials with NCTN trials and with the US cancer population.
Methods
We established a large cohort of study publications representing the results of trials that supported new US Food and Drug Administration drug approvals from 2008 to 2018. NCTN trial data were from the SWOG Cancer Research Network. US cancer population rates were estimated using Surveillance, Epidemiology, and End Results survey data. We compared the proportion of Black patients by enrollment year for each cancer type and overall. Tests of proportions were used. All statistical tests were 2-sided.
Results
A total 358 trials (pharmaceutical company–sponsored trials, 85; SWOG trials, 273) comprised of 93 825 patients (pharmaceutical company–sponsored trials, 46 313; SWOG trials, 47 512) for 15 cancer types were analyzed. Overall, the proportion of Black patients was 2.9% for pharmaceutical company–sponsored trials, 9.0% for SWOG trials, and 12.1% for the US cancer population (P < .001 for each pairwise comparison). These findings were generally consistent across individual cancer types.
Conclusions
The poor representation of Black patients in pharmaceutical company–sponsored trials supporting new drug applications could result in the use of new drugs with little data about efficacy or side effects in this key population. Moreover, because pharmaceutical company–sponsored trials test the newest available therapies, limited access to these trials represents a disparity in access to potential breakthrough therapies.
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