Ennis said if he had known about his partner’s potential risk of delirium beforehand, he could have tried to prevent it, “rather than, it’s here. Age is a risk factor, as delirium presents in about half of hospitalized patients ages 65 and older. Verma opens a web browser to a delirium risk prediction calculator and inputs a hypothetical 78-year-old woman’s information – her medical record number, hospital, age, lab test results and diagnoses. An Ottawa-based study in 2021 found a patient’s hospital stay can increase by almost a week and cost an additional $6,000. The delirium risk calculator is one of their projects and began with a research study of nearly 4,000 admissions at six Toronto area hospitals.