Data collection
cognitive impairment
At the time of enrolment, sites checked eligibility and recorded demographic characteristics in the screening log. Baseline assessments were undertaken after consent was obtained, prior to randomisation. Data collected at baseline included: hospital admission, age, sex, ethnicity, height, weight, patient cognitive impairment assessed using the AMTS,Participants were followed up at 4 months post randomisation. Data were collected via postal questionnaires by the central trial team.