Table 3.
ANCOVA (Type III) with BDNF status and covariate
| F (df) | p-value | Partial Eta squared | Cohen’s f | Achieved power | |||
|---|---|---|---|---|---|---|---|
| 110% group rank(MEP) ~ Age + BDNF |
Mean MEP amplitude | ||||||
| Val/Val | Val/Met | ||||||
| BDNF | 8.995 (1, 8) | 0.017* | 0.529 | 1.06 | 0.69 | 1.0 (±0.3) | 0.50 (±0.3) |
| Age | 0.322 (1, 8) | 0.585 | - | - | - | ||
| 1 mV group rank(MEP) ~ Age + BDNF |
Mean MEP amplitude | ||||||
| Val/Val | Val/Met | ||||||
| BDNF | 4.909 (1, 27) | 0.035* | 0.154 | 0.43 | 0.55 | 1.10 (±0.3) | 0.87 (±0.5) |
| Age | 7.689 (1, 27) | 0.010* | 0.222 | 0.53 | 0.57 | ||
ANCOVA = Analysis of covariances; MEP = motor evoked potential; EQ = Excitability quotient; × = interaction; BDNF = Brain-derived neurotrophic factor; df=numerator, denominator (residual) degrees of freedom