Table 3.

Subtests scores of the extended CERAD-NAB.

Subtest	Short Description
CERAD-NAB (core)   Animal fluency	Number of animals within 1 minute
Abbreviated Boston Naming Test	Number of correctly named objects (max. = 15)
Word list learning	Immediate recall of 10 words, three repetitions (max. = 30)
Word list recall	Delayed recall of 10 words (max. = 10)
Word list intrusions	Number of erroneously recalled words on all Word list learning and Word list recall trials
Word list savings	$=\frac{\mathrm{Word}\mathrm{list}\mathrm{recall}}{\mathrm{Word}\mathrm{list}\mathrm{learning},\mathrm{third}\mathrm{trial}}\times 100$
Word list discriminability	Recognition of 10 words on a 20 words list (includes 10 distractors)        $=\left\{1-\frac{\left(10-\mathrm{Hits}\right)+\left(10-\mathrm{Correct}\mathrm{Rejections}\right)}{20}\right\}\times 10$ (max. = 10)
Constructional praxis	Copying of four geometrical forms (max. = 11)
Constructional praxis recall	Delayed recall of four geometrical forms (max. = 11)
Constructional praxis savings CERAD-NAB (extension)	$=\frac{\mathrm{Constructional}\mathrm{praxis}\mathrm{recall}}{\mathrm{Constructional}\mathrm{praxis}}\times 100$
Letter fluency	Number of words beginning with letter ‘s’ within 1 minute
Trail Making Test A   Trail Making Test B	Time needed in seconds (max. = 180 by truncation) Time needed in seconds (max. = 300 by truncation)

The Mini Mental State Examination was not assessed. The Trial Making Test B/A quotient was not considered.