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Table 1 Baseline characteristics of patients with Alzheimer disease

From: Persistent treatment with cholinesterase inhibitors and/or memantine slows clinical progression of Alzheimer disease

Variable (n = 641) Value Range
Age, years 73 (8.50) 43-93
Female 68%  
Education, years 14 (3.56) 0-29
Early exposure index, years 0.5 (0.27) 0-1
Duration of symptoms before initial visit, years 3.7 (2.29) 0.5-13
Follow-up time, years 3.0 (1.94) 0.8-13.4
Total number of visits 3.4 (1.64) 2-11
  1. For all continuous variables, values are presented as mean (standard deviation).