Table 3.
Summary of six regression models fit separately to the average VBM data (logarithmic scale) from each region of interest. Results are presented as β (SEβ); σ denotes the residual standard deviation; asterisks denote significance at the 0.05 level. For each regression, continuous input variables were mean centered (fitness percentile centered to the percentile), but not rescaled. Regression also controlled for effects of non-interest: total intra-cranial volume, and RER ≥ 1.15
| R. Entorhinal | L. Entorhinal | Average | R. Hipp. | L. Hipp. | Average | |
|---|---|---|---|---|---|---|
|
|
|
|||||
| (Intercept) | −0.63 (0.03) | −0.64 (0.02) | −0.63 (0.02) |
−0.51 (0.02) |
−0.51 (0.02) |
−0.51 (0.02) |
| Fitness percentile |
0.0014* (0.0006) |
−0.0000 (0.0004) |
0.0007 (0.0005) |
−0.0006 (0.0005) |
−0.0005 (0.0005) |
−0.0005 (0.0005) |
| Memory accuracy (%) |
0.0032* (0.0013) |
0.0020 (0.0010) |
0.0026* (0.0011) |
0.0017 (0.0012) |
0.0009 (0.0011) |
0.0013 (0.0011) |
| BDNF (ng·ml−1) |
0.0005 (0.0020) |
−0.0020 (0.0016) |
−0.0007 (0.0016) |
0.0017 (0.0019) |
0.0008 (0.0017) |
0.0012 (0.0017) |
| Gender (0 female; 1 male) |
0.029 (0.030) | 0.035 (0.024) | 0.032 (0.026) |
0.0027 (0.029) |
−0.017 (0.026) |
−0.007 (0.027) |
|
|
||||||
| σ | 0.07 | 0.05 | 0.06 | 0.06 | 0.06 | 0.06 |