Table 5.
Correlations between plasma levels of BDNF and cognitive functions determined using Spearman’s test.
| Correlations/HD Stages | All HD | Early | Intermediate | Advanced | ||||
|---|---|---|---|---|---|---|---|---|
| R | p | R | p | R | p | R | p | |
| BDNF and VF Repetitions 0–60 s |
−0.27 | 0.04 | n.s. | n.s. | −0.41 | 0.04 | n.s. | n.s. |
| BDNF and TF III Correct words |
n.s. | n.s. | n.s. | n.s. | n.s. | n.s. | −0.86 | 0.04 |
| BDNF and SCNT Correct answers |
n.s. | n.s. | 0.53 | 0.04 | n.s. | n.s. | n.s. | n.s. |
| BDNF and SWRT Correct answers |
n.s. | n.s. | n.s. | n.s. | n.s. | n.s. | −0.87 | 0.04 |
| BDNF SWRT Incorrect answers–corrected |
0.31 | 0.04 | n.s. | n.s. | 0.41 | 0.04 | n.s. | n.s. |
| BDNF and SIT Correct answers |
n.s. | n.s. | 0.56 | 0.04 | n.s. | n.s. | n.s. | n.s. |
| BDNF and TMT part 1 Incorrect answers |
n.s. | n.s. | n.s. | n.s. | −0.4 | 0.04 | n.s. | n.s. |
| BDNF and TMT part 2 Filling time |
n.s. | n.s. | −0.53 | 0.04 | n.s. | n.s. | n.s. | n.s. |
| BDNF and TMT part 2 Correct answers |
n.s. | n.s. | n.s. | n.s. | n.s. | n.s. | −0.94 | 0.04 |
R—Spearman’s correlation coefficient, n.s.—not statistically significant, VF—verbal fluency, TF—phonemic fluency, SCNT—Stroop color naming test, SWR—Stroop word reading, SIT—Stroop interfence test, TMT—trail making test.