CRBRSCrichton Royal Behaviour Rating Scale
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To explore the effect of home size on behavioural problems a further logistic regression model was fitted at the home level with the proportion of patients aged 85 years and over, the proportion who were male, the proportion with moderate or severe confusion (CRBRS score [is greater than or equal to] 24), home size (number of residents) and the type of care as covariates.
In total 37.6% of elderly people in residential care (2219) were deemed by their care staff to be cognitively impaired (defined as moderately or severely confused by the confusion sub-scale of the CRBRS).
Since the tour homes were chosen to represent those with both lower and higher levels of confusion, this suggests that the CRBRS may be underestimating the presence of severe dementia.