TABLE 3.
Estimated fixed effects and variance components in the final quadratic growth model for infant’s resting RSA
| Parameter | Estimate | Est/S.E. | p-value |
|---|---|---|---|
| Residual variance | 0.673 | 16.630 | <.001 |
| Mean intercept | 2.698 | 55.419 | <.001 |
| Mean linear slope | 0.069 | 2.208 | .027 |
| Mean quadratic slope | .026 | 7.924 | <.001 |
| Intercept variance | .267 | 4.307 | <.001 |
| Linear slope variance | .059 | 2.379 | .017 |
| Quadratic slope variance | .001 | 2.890 | .004 |
| Intercept/linear slope covariance | −.039 | −1.225 | .220 |
| Intercept/quadratic slope covariance | .002 | 0.794 | .427 |
| Linear slope/quadratic slope covariance | −.007 | −2.588 | .010 |