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ABSTRACTBackgroundAlthough suspicions of cancer may be raised in patients who visit the emergency department, little is known about emergency department use before a cancer diagnosis. We sought to describe emergency department use among patients in Ontario within the 90 days before confirmed cancer diagnosis and to evaluate factors associated with this emergency department use. MethodsWe conducted a retrospective, population-based study of patients aged 18 years or older who had a confirmed cancer diagnosis in Ontario from 2014 to 2021 using linked administrative databases. The primary outcome was any emergency department visit within 90 days before the cancer diagnosis date. We used multivariable logistic regression to evaluate factors associated with emergency department use, such as demographics (e.g., age, sex, rurality, Ontario Health region, indicators of marginalization), comorbidities, previous emergency department visits and hospital admissions, continuity of primary care, type of cancer, and year of cancer diagnosis. ResultsWe included 651 071 patients with cancer. Of these, 229 683 (35.3%) had an emergency department visit within 90 days before diagnosis, 51.4% of whom were admitted to hospital from the emergency department. Factors associated with increased odds of emergency department use before cancer diagnosis included rurality (odds ratio [OR] 1.15, 95% confidence interval [CI] 1.13–1.17), residence in northern Ontario (North East region OR 1.14, 95% CI 1.10–1.17 and North West region OR 1.27, 95% CI 1.21–1.32, v. Toronto region), and living in the most marginalized areas (material resources OR 1.37, 95% CI 1.35–1.40 and housing OR 1.09, 95% CI 1.06–1.11, v. least marginalized quintile). We observed significant variation in emergency department use by cancer type, with high odds of emergency department use among patients with intracranial, pancreatic, liver or gallbladder, or thoracic cancer. InterpretationEmergency department use is common before cancer diagnosis, with about one-third of patients with cancer in Ontario using the emergency department before diagnosis. Understanding why patients visit the emergency department before cancer diagnosis is important, particularly for patients who live in rural or marginalized areas, or those who have specific cancer types.

Patients with cancer have complex care requirements and frequently use the emergency department. The purpose of this study was to determine whether continuity of care, cancer expertise of an institution or both affect outcomes in patients with cancer in the emergency setting. We conducted a retrospective cohort study using administrative databases from Ontario, Canada, involving records of patients aged 20 years and older who received chemotherapy or radiation in the 30 days before a cancer-related visit to the emergency department between 2006 and 2011. Patients seen in an emergency department at an alternative hospital (not the site where cancer treatment was given) were matched based on propensity score to patients who visited their original hospital (site where cancer treatment was given). Next, patients seen at an alternative emergency department that was in a general hospital (i.e., not a cancer centre) were matched to patients who visited their original hospital or a cancer centre. Outcomes were admission to hospital at the index visit to the emergency department, 30-day mortality, having imaging with computed tomography and return visits to the emergency department. We found 42 820 patients who were eligible for our study. Patients seen in the emergency departments at alternative hospitals were less likely to be admitted to hospital (odds ratio [OR] 0.78, 95% confidence interval [CI] 0.74–0.83) and had higher hazards of return visits to the emergency department than matched patients at original hospitals (hazard ratio [HR] 1.06, 95% CI 1.03–1.11). In comparison, patients at alternative general hospitals also had lower odds of admission to hospital (OR 0.83, 95% CI 0.79–0.88) and higher hazards of return visits to the emergency department (HR 1.07, 95% CI 1.03–1.11) compared with matched counterparts; however, these patients had higher 30-day mortality (OR 1.13, 95% CI 1.05–1.22) and lower odds of having CT imaging (OR 0.74, 95% CI 0.69–0.80). Cancer expertise of an institution rather than continuity of care may be an important predictor of outcomes following emergency treatment of patients with cancer.

We surveyed patients who had a received care for a gastrointestinal cancer between 03/2020 and 05/2021 to understand their perceptions of the impact of the Covid pandemic on cancer care delivery and quality of care. Three-hundred fifty-eight respondents provided evaluable responses (response rate: 17.3%). Approximately half of respondents (46.4%) perceived that they had experienced a pandemic-related cancer care modification; most changes were initiated by a clinician or the cancer center (44.6%). Relative to White patients those from Racialized Groups (OR: 1.91, 95% CI: 1.03-3.54) were more likely to report a cancer treatment change. Additionally, relative to patients in follow-up, those who were newly diagnosed (OR: 2.39; 95% CI: 1.21-4.71) were more likely to report a change. Compared to White patients, patients from Racialized Groups were approximately twice as likely to report perceiving that virtual visits during Covid negatively impacted the quality of their care (OR: 2.21; 95% CI: 0.96-5.08). These findings potentially reflect pre-existing systemic disparities in quality of and access to care, as well as differences in how care is experienced by patients from Racialized Groups.