Table 3.

Z-scores equations based on Aβ- individuals.

Neuropsychological test	Raw score range	n	Z-score equations
AVLT Immediate	0–75	440	Z-score = Raw score–(68.396 + −0.363 * AGE + −5.913 * SEX + 0.358 * EDUCATION)/3.048
AVLT delayed	0–15	439	Z-score = Raw score–(17.508 + −0.117 * AGE + −1.586 * SEX + 0.019 * EDUCATION)/1.796
TMT-A	15–100	674	Z-score = −1*(Raw score–(20.020 + 0.433 * AGE + −0.839 * EDUCATION)/3.587)
TMT-B	20–200	670	Z-score = −1*(Raw score–(37.609 + 1.251 * AGE + −2.486 * EDUCATION)/5.627)

AVLT Immediate, Auditory Verbal Learning Test sum of 5 learning trials; AVLT Delayed, Auditory Verbal Learning Test delayed recall; TMT-A, Trail Making Test part A; TMT-B, Trail Making Test part B. Variables are coded as follows: Age (continuous variable); Sex: Female = 0, Male = 1; Education: years of education (continuous variable).