• The Extended Scale for Dementia was introduced as a test for grading the intellectual function of patients with dementia. Its use in discriminating demented patients from nondemented control subjects has been explored. The test had a sensitivity of 93% and a specificity of 96% in patients over the age of 65 years, but the sensitivity fell to 75% in those younger than 65 years. The scale may be useful, particularly for patients over the age of 65 years, in helping to distinguish dementia from normality.
Lau C, Wands K, Merskey H, et al. Sensitivity and Specificity of the Extended Scale for Dementia. Arch Neurol. 1988;45(8):849–852. doi:10.1001/archneur.1988.00520320035012
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