The National Adult Reading Test (NART), used to estimate premorbid mental ability, involves pronunciation of irregular words. The authors demonstrate that, after controlling for age 11 IQ test scores, mean NART scores do not differ in people with and without dementia. The correlation between age 11 IQ and NART scores at about age 80 was similar in the groups with (r = 0.63, p < 0.001) and without (r = 0.60, p < 0.001) dementia. These findings validate the NART as an estimator of premorbid ability in mild to moderate dementia.

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Clinically, the degree to which drugs impair cognition in relatively fit, older people may not be apparent. However, in population terms, medication use, particularly polypharmacy, is important. Statins, used as currently indicated for cardiovascular disease, appear promising in ameliorating cognitive decline in older people. However, firm recommendation of their use should await the outcome of ongoing randomised clinical trials.

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