Table 3. Neuropsychological test results according to subgroups of memory impairment (n=38) and NC (n=37).
| Verbal-aMCI (n=12) | Visual-aMCI (n=10) | Both-aMCI (n=16) | NC (n=37) | |
|---|---|---|---|---|
| Attention | ||||
| Digit Span Test, forward | 0.79±1.44 | 0.44±1.22 | 0.22±1.14* | 1.03±0.79 |
| Digit Span Test, backward | 0.45±0.67 | -0.20±1.35 | -0.44±0.83* | 0.47±1.09 |
| Language and related function | ||||
| K-BNT score | -0.26±1.07 | -0.44±0.77* | -1.92±1.68* | 0.18±0.85 |
| Visuospatial function | ||||
| RCFT, copying | 0.48±0.84 | -0.23±1.22 | -0.60±2.11 | 0.50±0.61 |
| Memory | ||||
| SVLT, immediate recall | -0.86±0.43* | -0.51±0.89* | -1.35±0.94* | 0.30±0.78 |
| SVLT, delayed recall | -1.74±0.44* | -0.37±0.51* | -2.27±0.59* | 0.38±0.69 |
| RCFT, immediate recall | 0.00±0.72* | -1.04±0.44* | -1.49±0.72* | 0.83±0.89 |
| RCFT, delayed recall | -0.23±0.64* | -1.53±0.20* | -1.82±0.56* | 0.89±0.83 |
| Frontal executive function | ||||
| COWAT, animal names | -0.55±0.82 | -1.03±0.54* | -1,78±0.92* | 0.05±0.96 |
| COWAT, supermarket items | -0.64±0.89* | -0.18±0.79 | -1.28±0.82* | 0.36±0.91 |
| COWAT, phonemic fluency | -0.14±0.81* | 0.28±1.07 | -0.43±1.26* | 0.58±0.94 |
| Stroop test, color reading | -0.79±0.65* | -0.02±1.30 | -1.33±1.25* | 0.39±0.90 |
| TMT-B | -1.15±1.39* | -0.64±1.38* | -4.19±4.57* | 0.20±0.82 |
Data are mean±SD values. All data are z scores.
*p<0.05 versus NC in independent t-test for continuous variables.
aMCI: amnestic MCI, Both-aMCI: MCI with both visual and verbal memory impairment, COWAT: Controlled Oral Word Association Test, K-BNT: Korean version of the Boston Naming Test, MCI: mild cognitive impairment, MMSE: Mini Mental State Examination, NC: normal cognition, RCFT: Rey Complex Figure Test, SVLT: Seoul Verbal Learning Test, TMT-B: Trail-Making Test type B, Verbal-aMCI: MCI with verbal memory impairment, Visual-aMCI: MCI with visual memory impairment.