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The term behavioral and psychological symptoms of dementia (BPSD) encompasses a diverse cluster of behavioral disturbances, such as restlessness (Hope et al., 1994), aggression (Patel & Hope, 1992), and shouting (Cohen-Mansfield & Werner, 1997), and a variety of psychiatric symptoms, including delusions (Burns et al., 1990), hallucinations (Holroyd & Sheldon-Keller, 1995), depression (Greenwald et al., 1989), and anxiety (Ballard et al., 1996a). Such symptoms are extremely common in patients with dementia and have important associations with burden and depression in caregivers.
Ballard et al. (Sat,) studied this question.