Table 1.
Demographic and neuropsychological data
| a-MCI (n=31) | NC (n=42) | |||
|---|---|---|---|---|
| Mean (STD) | Range | Mean (STD) | Range | |
| Age (years old) | 70.9 (6.5) | 56 to 83 | 70.6 (8.8) | 55 to 88 |
| Education (years) | 16.5 (2.7) | 9 to 20 | 16.3 (3.1) | 9 to 20 |
| Female : Male | 11 : 20** | - | 29 : 13 | - |
| MMSE | 27.8** (1.8) | 24 to 30 | 29.1 (1.2) | 25 to 30 |
| Trails A (seconds) | 37.5* (14.5) | 19 to 69 | 30.9 (9.8) | 18 to 65 |
| Trails B (seconds) | 112.3** (61.9) | 41 to 300 | 75.4 (28.9) | 38 to 161 |
| Digits Forwards Max a | 6.6 (1.2) | 4 to 8 | 7.0 (1.0) | 5 to 8 |
| Digits Backwards Max a | 4.9 (1.2) | 3 to 7 | 5.1 (1.3) | 3 to 7 |
| 10-item Word List Immediate Recall | 17.8** (4.3) | 8 to 30 | 23.5 (3.8) | 16 to 30 |
| 10-item Word List Delayed Recall | 3.6** (2.1) | 0 to 8 | 8.0 (2.0) | 0 to 10 |
| Category Fluency (animals) | 17.6** (4.1) | 11 to 26 | 22.0 (5.7) | 10 to 31 |
| 30-item Boston Naming Test Total | 26.8* (4.0) | 19 to 30 | 28.6 (1.9) | 22 to 30 |
| Scene Recognition Memory (d’) b | 1.5** (0.9) | −0.5 to 2.9 | 2.3 (0.6) | 1.0 to 3.4 |
Note: Standard deviations (STD) are in parentheses.
*
= p < 0.05,
**
= p < 0.01,
compared to the normal controls, tested by contingency χ2 test (sex) and independent two-sample t-test (the other items). a-MCI = amnestic mild cognitive impairment. NC = normal control. MMSE = mini mental status examination.
a
2 a-MCI patients did not have Digits Forwards and Digits Backwards data available.
b
6 a-MCI patients and 5 NC subjects did not have Scene Recognition Memory data available.