Table 2. Final multiple linear regression model.
| Variable | R2 coefficient | Adjusted R2 | B coefficient (95%CI) |
p level |
|---|---|---|---|---|
| BDNF | 0.45 | 0.38 | 0.007 | |
| Regular physical exercise, yes or no | 849.12 (198.34 - 1499.90) | 0.014 | ||
| Age, years | -31.02 (-56.23 - -5.80) | 0.019 | ||
| Constant | 898.70 ( -56.97 - 1854.38) | 0.064 | ||
| STAI-Trait | 0.58 | 0.50 | 0.035 | |
| Sex, female or male | 7.76 (1.308068 - 14.2169) | 0.022 | ||
| Family income | -3.19 (-5.1899 - -1.1964) | 0.004 | ||
| Use of natural substances, yes or no | - 7.58 (-13.991 - -1.1768) | 0.023 | ||
| Constant | 21.36 (11.359 - 31.370) | 0.000 |
Final regression model suggesting that BDNF is positively associated with regular physical activity, and inversely associated with age. IDATE-Trait is associated with female sex, inversely associated with income and use of natural substances.