ABSTRACT
BACKGROUND: Solid cancer is an independent prognostic factor for poor outcome with COVID-19. As guidelines for patient management in that setting depend on retrospective efforts, we here present the first analyses of a nationwide database of patients with cancer hospitalized with COVID-19 in Belgium, with a focus on changes in anticancer treatment plans at the time of SARS-CoV-2 infection. METHODS: Nineteen Belgian hospitals identified all patients with a history of solid cancer hospitalized with COVID-19 between March 2020 and February 2021. Demographic, cancer-specific and COVID-specific data were pseudonymously entered into a central Belgian Society of Medical Oncology (BSMO)-COVID database. The association between survival and primary cancer type was analyzed through multivariate multinomial logistic regression. Group comparisons for categorical variables were carried out through a Chi-square test. RESULTS: A total of 928 patients were registered in the database; most of them were aged ≥70 years (61.0%) and with poor performance scores [57.2% Eastern Cooperative Oncology Group (ECOG) ≥2]. Thirty-day COVID-related mortality was 19.8%. In multivariate analysis, a trend was seen for higher mortality in patients with lung cancer (27.6% versus 20.8%, P = 0.062) and lower mortality for patients with breast cancer (13.0% versus 23.3%, P = 0.052) compared with other tumour types. Non-curative treatment was associated with higher 30-day COVID-related mortality rates compared with curative or no active treatment (25.8% versus 14.3% versus 21.9%, respectively, P < 0.001). In 33% of patients under active treatment, the therapeutic plan was changed due to COVID-19 diagnosis, most frequently involving delays/interruptions in systemic treatments (18.6%). Thirty-day COVID-related mortality was not significantly different between patients with and without treatment modifications (21.4% versus 20.5%). CONCLUSION: Interruption in anticancer treatments at the time of SARS-CoV-2 infection was not associated with a reduction in COVID-related mortality in our cohort of patients with solid cancer, highlighting that treatment continuation should be strived for, especially in the curative setting.
ABSTRACT
Background: Solid cancer is an independent prognostic factor for COVID-19 related mortality. Adverse prognostic factors in these patients include low performance status, lung cancer, advanced cancer stage and recent diagnosis. In this study, we further evaluated prognostic effects of cancer diagnosis and treatment variables and characterized changes in anticancer treatment plans due to COVID-19 diagnosis in a nation-wide cohort study. Methods: Patients with a history of solid cancer hospitalized with COVID-19 between March 2020 and February 2021 in one of the 20 participating institutions in Belgium were included. Patient demographics, comorbidities, COVID-19 hospitalization course and treatment, cancer and anticancer treatment characteristics, treatment changes due to COVID-19 and clinical outcomes in-hospital and during follow-up were retrospectively registered in a central database. The primary objective was to evaluate potential differences in 30-day and 3-month COVID-19-related mortality according to cancer and anticancer treatment characteristics. Results: A total of 946 patients (median age 73y, interquartile range 64-81y) were included. Pre-existing comorbidities were present in 90.1% of patients, and 21.9% had a history of > 1 malignancy. Half of the patients (n = 463, 49.3%) had received anticancer treatment ≤3 months before COVID-19 diagnosis (“active cancer”), of whom 286 (63.1%) in the non-curative setting. The overall 30-day and 3-month COVID-19- related mortality rates in this cohort were 21.4% (n = 178) and 24.1% (n = 194), respectively. COVID- related 3-month mortality was comparable in patients with active cancer (n = 96, 24.3%) and in patients with non-active cancer (n = 97, 24.0%), but within the first group COVID-related mortality was higher in those receiving systemic treatment in the non-curative (28.3%) versus the curative setting (15.2%). A change in the anticancer treatment plan due to COVID-19 was recorded in 148/463 patients with active cancer (32.0%). In patients with changes in systemic treatment plans (n = 146), treatment was delayed in 94 patients (in half of cases for > 1 month) and cancelled in 42 patients. The main reason for modifications in anti-cancer treatment was COVID-19 related complications (79.6%), followed by fear for/existence of anticancer treatment related toxicity (14.8%). Conclusions: Our nation-wide analysis in patients with solid cancer hospitalized with COVID-19 shows comparable 3-month mortality among patients who did and who did not receive anticancer treatment in the three months before COVID-19 diagnosis. Changes in anticancer treatment were very frequent in patients hospitalized with COVID-19. Further monitoring of the long-term impact of COVID-19-related changes to anticancer treatment plans is warranted.