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The correlated parameters of equation and result of t-test.
| Terms | Coefficient | t | p |
|---|---|---|---|
| Equation for y (age) | |||
| Constant | −0.3524 | ||
| x | −0.01759 | −3.763 | <0.001 |
| x2 | 0.009417 | 13.644 | <0.001 |
| x3 | −0.0001840 | −6.681 | <0.001 |
| Equation for SD (age) | |||
| Constant | 0.1059 | ||
| x | 0.01434 | 9.265 | <0.001 |
| x2 | −0.0005324 | −5.213 | <0.001 |
