Survey on Current Practice of Canadian Physicians Regarding the Investigation in Older Patients with Delirium

Background The current literature provides heterogeneous recommendation regarding the investigation of older delirious patients, which may lead to over-testing. Our study aims to describe Canadian physicians' current practice for the investigation of older patients with delirium. Our secondary objective is to define specific indications for performing a CT head scan in this population. Methods Design: cross-sectional online survey. Participants: physicians who conduct their clinical practice in Canada and who care for older patients with delirium. Potential study participants were reached through Canadian associations: Canadian Geriatrics Society, the Canadian Association of Emergency Physicians, the Association des Medecins d'Urgence du Quebec, and members of Choosing Wisely Canada.Results We received 296 survey responses. More than 80% of respondents always order complete blood count, urea, and creatinine and electrolytes. Extended electrolytes, TSH, chest X-ray, electrocardiogram, urinalysis and urinary culture tests tend to be ordered somewhat frequently. Physicians mostly agreed to order a head CT scan for loss of consciousness, altered mental status, fall, and anticoagulation.Conclusions Physicians' investigations for older patients with delirium are highly variable, even with the lack of evidence supporting a broad workup. Also, respondents mostly align with current recommendations of indications for CT head scans.