| Variable | Intercept | A | B | C | R2 |
| Coef. | 4.791 | 28.219 | 18.659 | −7.769 | 0.743 |
| Std.err | 0.548 | 5.048 | 5.890 | 7.084 | |
| P-value | 0.000 | 0.000 | 0.007 | 0.291 |