Table 2.
Mean values and standard deviations (SD, in brackets) of amplitudes (μV) and latencies (ms) for early-P3a (e-P3a, 280–400 ms) and late-P3a (l-P3a, 350-500 ms) measured in N-S difference waveforms, for the three groups of participants (Control, sdaMCI, and mdaMCI).
| Control N = 20 | sdaMCI N = 19 | mdaMCI N = 11 | ||
|---|---|---|---|---|
| Amplitude e-P3a | Fz | 9.5 (4.5) | 9.4 (5.8) | 13.3 (5.1) |
| Cz | 12.6 (4.4) | 11.2 (6.8) | 16.2 (5.1) | |
| Pz | 10.0 (4.2) | 6.6 (6.2) | 12.6 (6.1) | |
| Latency e-P3a | Cz | 379 (27.6) | 391 (25.0) | 386 (42.7) |
| Amplitude l-P3a | Fz | 9.2 (3.5) | 9.2 (4.1) | 13.1 (4.4) |
| Cz | 12.0 (3.9) | 11.4 (4.5) | 16.9 (5.1) | |
| Pz | 10.8 (3.6) | 8.8 (4.9) | 15.0 (4.8) | |
| Latency l-P3a | Cz | 457 (26.1) | 466 (32.1) | 461 (34.5) |
sdaMCI: single-domain amnestic mild cognitive impairment; mdaMCI: multi-domain amnestic mild cognitive impairment.