Table 3.

Number of low scores in the ADNI NC group (low scores ≤1.5SD) out of 9 tests. N = 280

N low scores	n	%	Cum %
≥6	0	0.00%	0.00%
5	3	1.07%	1.07%
4	1	0.36%	1.43%
3	18	6.43%	7.86%
2	45	16.07%	23.93%
1	78	27.86%	51.79%
0	135	48.21%	100.00%

Bold cells indicate the <10% cut-off point. Cum %: cumulative percentage of individuals obtaining a number of low test scores from 0 to ≥6.

Memory category includes three variables: LM delayed recall, RAVLT delayed recall and recognition

Non-memory category includes six variables: CD test copy and drawing, TMT Parts a and B, semantic fluency and BNT.