| Model | R
2 | MARS GCV | Std. Err. of the estimate | BF in model | Predictors |
| (30;1) | 0.991 | 0.989 | 22.53 | 6 | TR,
C,
P NE,
P IN2 | (40;1) | 0.991 | 0.989 | 22.55 | 6 | TR, , , , | (50;1) | 0.991 | 0.989 | 22.53 | 6 | TR, , , |
| (30;2) | 0.997 | 0.995 | 13.90 | 13 | TR,
P NE,
C,
P RF, DR,
P IN2 | (35;2) | 0.997 | 0.995 | 13.90 | 13 | TR, , , , DR, , | (40;2) | 0.997 | 0.995 | 13.90 | 13 | TR, , , , DR, , |
| (30;3) | 1.000 | 0.999 | 0.14 | 21 | TR, , , DR, | (35;3) | 1.000 | 0.999 | 0.33 | 24 | TR, , , DR, | (40;3) | 1.000 | 0.999 | 0.33 | 24 | TR, , , DR, |
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