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Mental disorders of old age 

Mental disorders of old age
Mental disorders of old age

Robin Jacoby


July 30, 2015: This chapter has been re-evaluated and remains up-to-date. No changes have been necessary.


Dementia—discussion of evidence of the harm that can be caused by antipsychotic drugs, and recommendations for their use.

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date: 19 September 2021

Mental disorders of old age are important because: (1) demographic trends in all countries show a marked increase in the number of older people, especially the very old; (2) this age group is particularly prone to debilitating mental illness—about 20% of people over 80 have dementia, and over 10% of people over 65 have pervasive depressive symptoms; (3) presentations of mental illness in older people may differ from those at younger ages and go unrecognized—assessment requires a reliable informant, examination of the mental state, and physical examination; (4) the pattern of morbidity differs, with older people suffering more from organic disorder—delirium and dementia; (5) mental and physical illness often occur together, the one sometimes masking the other....

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