The prognostic validity of delirium severity as measured by Delirium Observation Screening Scale (DOS scale) on adverse outcomes.

OBJECTIVE: To investigate whether an assessment of delirium severity at diagnosis using the Delirium Observation Screening Scale (DOS scale) predicts adverse outcomes in hospital and on discharge. METHODS: A prospective cohort study was conducted on a convenience sample of patients admitted to an acute geriatric ward with delirium over an eight-month period. DOS scale was administered to the patients within 48 h of delirium diagnosis to measure delirium severity. Univariate logistic regression analysis was performed to evaluate the correlation between DOS scale and adverse outcomes. RESULTS: Fifty-nine patients were included in the study. There was a moderate correlation between increasing DOS scores and duration of delirium (r = 0.46, p < 0.001), as well as increasing DOS scores and decline in mobility on discharge (r = 0.35, p = 0.007). There was a weak correlation between increasing DOS scores and functional decline as measured by change in Katz Index from admission to discharge (r = -0.27, p = 0.04). No statistically significant correlations were found between DOS scores and in-hospital mortality, inpatient complication rates or discharge to higher level of care. CONCLUSION: Delirium severity as measured by DOS scale may be useful in predicting delirium duration and decline in mobility and function on discharge. Further research with larger sample sizes is needed to establish if this finding can be replicated and whether delirium severity predicts additional adverse outcomes. Measuring delirium severity at diagnosis may be useful for communicating prognostic information to family members and setting expectations and treatment goals.

Frailty and adverse outcomes: impact of multiple bed moves for older inpatients.

BACKGROUND: A consequence of pressure on hospitals to accommodate care needs of older patients is "boarding" or out-lying from their home ward. This may have greater adverse effects on older inpatients who are frail. METHODS: A retrospective matched cohort study was conducted in an outer metropolitan general hospital. Randomly selected patients hospitalized between July 2012 and June 2013 under the care of an Older Person Evaluation Review and Assessment (OPERA) team (n = 300) were age and sex matched with patients under the care of general physicians (n = 300). Frequency of boarding and number of bed moves were recorded for all patients. For patients who had three or more moves, adverse outcomes were compared between the two groups. RESULTS: A higher proportion of OPERA patients (n = 143; 47.7%) were out-lied from medical wards compared with 94 (31.3%) General Medicine patients (p < 0.001). Three or more bed moves were recorded for 67 (22.3%) OPERA and 24 (8%) General Medicine patients (p < 0.001). Of those with multiple moves, OPERA patients were more likely to have pre-morbid cognitive impairment (p = 0.005), to be moderately to severely frail (p = 0.016) and to suffer acute delirium and falls during admission (p = 0.03), compared with General Medicine patients. OPERA patients were also more at risk of adverse outcomes such as increased dependence, discharge to residential care or death (p = 0.023). CONCLUSION: Compared with age- and sex-matched General Medicine patients, OPERA patients were more likely to undergo multiple bed moves and out-lying, which may have contributed to negative outcomes for these patients.