ALB and dementia: Of the risk factors examined, 10 consistently showed statistically significant association with incident delirium in both univariable and multivariable analysis: dementia, co-morbid physical illness, severity of physical illness (as measured by APACHE II) , poor ADL function, urinary catheterisation, polypharmacy, low albumin, urea/creatinine ratio abnormality (azotemia), low or high sodium and prolonged hospital stay.