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	The typical course lasts approximately 10 years, however it has recently been reported that patients with AD are living longer. The survival experience of a cohort of 960 AD patients was followed from 1960-1984. The authors found that patients with more recent onset (1975-1984) tend to live longer than those who were diagnosed during the period (1960-1974). Increased survival may be due to earlier recognition of the disease, good nursing home care and the increase in nursing home beds in the study community (Rochester, Minn).