Common Risk Factors for Delirium Precipitating • New acute medical problem • Exacerbation of chronic medical problem • Surgery/anesthesia • New psychoactive medication • Acute stroke • Pain • Environmental change • Urine retention/fecal impaction • Electrolyte disturbances • Dehydration • Sepsis Predisposing • Advanced age • Preexisting dementia • History of stroke • Parkinson disease • Multiple comorbid conditions • Impaired vision • Impaired hearing • Functional impairment • Male sex • History of alcohol abuse Marcantonio, 2011.