Quispel‐Aggenbach DWP, Schep‐de Ruiter EPR, van Bergen W, et al. - Since delirium is a serious neuropsychiatric syndrome that needs timely treatment, however, it is easily overlooked, particularly in older patients with premorbid cognitive disorders, researchers examined the prevalence and risk factors of delirium in older outpatients with and without dementia. Between March 2013 and March 2014, 444 patients referred to the memory clinic of a psychiatric hospital were assessed. Demographic information, medical history, impairments in daily living activities, and referral information have been registered. In one of five patients referred for dementia screening, delirium has been identified. Most patients could have been treated at home. Data reported that the prevalence of probable delirium was 19% in older outpatients with and without dementia, the prevalence of possible delirium was 2%. Infection, drug‐intoxication or withdrawal, and metabolic/endocrine disturbance were the most common triggers. Independent non‐modifiable factors associated with an increased risk of delirium were age and prior delirium. Infection was the only independent modifiable risk factor.