Table 1.
Descriptive statistics by sample (raw scores except where indicated)
| TARCC NHW (N = 2251) | ADNI NHW (N = 1668) | |
|---|---|---|
| Alzheimer’s disease cases, n (%) | 1100 (49.7) | 342 (19.7) |
| MCI cases, n (%) | 395 (17.8) | 978 (56.3) |
| NC, n (%) | 718 (32.4) | 417 (24.8) |
| Gender, female, n (%) | 1288 (57.2) | 919 (55.1) |
| Mean (SD) | Mean (SD/d1) | |
| Age | 73.1 (8.96) | 73.8 (7.2/0.09**) |
| Education | 15.1(2.78) | 15.9 (2.9/0.28**) |
| MMSE | 25.2 (5.04) | 27.2 (2.7/0.49**) |
| Animals | 14.4 (6.04) | 17.2 (5.9/0.47**) |
| BNTa | 9.2 (4.19) | 26.1 (4.51/b) |
| CDR-SB | 3.1 (3.59) | 1.6 (1.8/0.53**) |
| GDS | 4.9 (4.10) | 1.4 (1.4/1.14**) |
| LMI | 7.7 (4.43) | 9.3 (4.8/0.35**) |
| LMII | 7.5 (4.75) | 7.1 (5.3/0.08**) |
| Trails B | 8.0 (4.08) | 122.2 (75.8/c) |
d1 = Cohen’s d versus TARCC. Animals = animal naming; BNT = Boston Naming Test; CDR-SB = Clinical Dementia Rating scale ‘Sum of Boxes’; LMI = Wechsler Logical Memory immediate recall; LMII = Wechsler Logical Memory delayed recall; MA = Mexican-American; MMSE = Mini–Mental State Examination; SD = standard deviation; Trails B = Trail-Making Test Part B.
a
Scaled scores.
b
TARCC uses 30-item BNT, and ADNI uses 60-item BNT.
c
TARCC uses scale scores, and ADNI uses in seconds.
**P < 0.001.