The Minimum Data Set Agitated and Reactive Behavior Scale: Measuring Behaviors in Nursing Home Residents With Dementia.

objectivesInterventions aimed at managing agitated and aggressive behaviors in dementia without the use of antipsychotics are currently being tested in nursing homes (NHs). Researchers and clinicians require a measure that can capture the severity of residents' behaviors. We test the internal consistency and construct validity of the Agitated and Reactive Behavior Scale (ARBS), a measure created using data from mandatory NH assessments.

designCross-sectional. SETTING AND

participantsThe 2016 national sample of 15,326 Centers for Medicare and Medicaid Services-certified NHs. The analytic sample included 489,854 new admissions and 765,367 long-stay residents (at least 90 days in NH). All participants have a dementia diagnosis.

methodsMinimum Data Set (MDS), version 3.0. The ARBS is a composite measure of (1) physical behavioral symptoms directed at other people; (2) verbal behavioral symptoms directed at other people; (3) other behavioral symptoms not directed at other people; and (4) rejection of care. Variables used to establish construct validity included degree of cognitive impairment, use of medications for managing agitation and aggression, and co-occurring conditions associated with agitated and aggressive behaviors (eg, schizophrenia, depression, or delirium).

resultsThis report has 3 important findings: (1) the ARBS score has borderline-adequate internal consistency (α = .64-.71) in the national population NH residents with dementia; (2) only 18% of new admissions and 21% of long-stay residents with dementia evidence any agitated or aggressive behaviors in the last week, as rated in the MDS assessment; and (3) the ARBS demonstrates good construct validity; it increases with cognitive impairment, treatment with relevant medications, and co-occurring psychiatric conditions and symptoms. DISCUSSION: Nationally available MDS data may significantly underestimate the prevalence of agitated and aggressive behaviors among NH residents with dementia. CONCLUSIONS AND IMPLICATIONS: Researchers conducting pragmatic trials of non-pharmaceutical interventions to manage behaviors in NH residents with dementia should consider the likely underdetection of these behaviors in the available MDS data.