Table 3.
Relation between EEG alpha coherence in the frontoparietal electrode pair and clinical characteristics in PD patients.
| Low F3-P3 (left side) coherence group |
High F3-P3 (left side) coherence group |
p | Low F4-P4 (right side) coherence group |
High F4-P4 (right side) coherence group |
p | |
|---|---|---|---|---|---|---|
| Age (years) | 70.0 (42–87) | 61.5 (34–81) | 70.5 (42–87) | 59.0 (34–76) | ||
| ≤50 | 2 | 4 | 0.144 | 1 | 5 | 0.002∗ |
| 51–60 | 7 | 10 | 3 | 14 | ||
| 61–70 | 13 | 9 | 13 | 9 | ||
| >70 | 18 | 7 | 17 | 8 | ||
|
| ||||||
| Sex | ||||||
| Male | 23 | 14 | 0.469 | 18 | 19 | 1.00 |
| Female | 17 | 16 | 16 | 17 | ||
|
| ||||||
| Disease duration (months) | 48 (9–192) | 60 (9–228) | 0.130 | 50 (9–192) | 60 (9–228) | 0.300 |
|
| ||||||
| HY stage | 3.0 (1–5) | 2.0 (1–4) | ||||
| I | 3 | 2 | 0.464 | 1 | 4 | 0.012∗ |
| II | 15 | 16 | 12 | 19 | ||
| III | 19 | 9 | 20 | 8 | ||
| IV | 2 | 3 | 1 | 4 | ||
| V | 1 | 0 | 0 | 1 | ||
|
| ||||||
| Standardized BADS score | 85 (46–114) | 95 (56–124) | 0.032∗ | 85 (51–114) | 95 (46–124) | 0.055 |
|
| ||||||
| Age-controlled standardized BADS score | 89 (54–124) | 94 (53–124) | 0.063 | 84 (59–124) | 94 (53–124) | 0.152 |
Data are expressed as median (range) or n.
BADS: Behavioral Assessment of the Dysexecutive Syndrome; HY stage: Hoehn and Yahr stage; PD: Parkinson's disease.
The low coherence group had coherence <0.5 and the high coherence group had coherence ≥0.5.
Age, sex, and HY stage were compared across groups using Fisher's exact test. Disease duration, standardized BADS score, and age-controlled standardized BADS score were compared across groups using the Mann-Whitney U test. ∗Statistically significant (p < 0.05).