Table 4.
Mixed models predicting academic skills from indicators of emotional-behavioral difficulties. (Part 2).
| Reading Speed | ||||||
|---|---|---|---|---|---|---|
| Fixed Effects | B | SE | df | T | LLCI | ULCI |
| Intercept | −0.048 | 0.035 | 20.302 | −1.379 | −0.121 | 0.024 |
| Sex | −0.097 * | 0.043 | 422.509 | −2.236 * | −0.183 | −0.011 |
| Conduct problems | −0.007 | 0.038 | 424.244 | −0.209 | −0.083 | 0.067 |
| Hyperactivity | −0.120 *** | 0.033 | 426.456 | −3.551 *** | −0.187 | −0.053 |
| Difficulties with peers | 0.018 | 0.034 | 413.404 | 0.535 | −0.048 | 0.085 |
| Emotional difficulties | −0.016 | 0.029 | 420.211 | −0.567 | −0.073 | 0.040 |
| Conduct problems X Sex | 0.032 | 0.076 | 423.930 | 0.423 | −0.117 | 0.182 |
| Hyperactivity X Sex | −0.044 | 0.066 | 421.226 | −0.663 | −0.175 | 0.086 |
| Difficulties with peers X Sex | −0.008 | 0.064 | 415.374 | −0.125 | −0.135 | 0.119 |
| Emotional difficulties X Sex | −0.087 | 0.056 | 421.699 | −1.564 | −0.197 | 0.022 |
| Random Effects | b | Z Wald | ||||
| Σu | 0.015 † | 1.931 † | ||||
| Σe | 0.181 *** | 14.302 *** | ||||
| Deviance | ||||||
| −2LL (df) | 558.268(12) | |||||
| AIC | 552.268 | |||||
†p < 0.10. * p < 0.05. *** p < 0.001. Note: Sex: male −0.5 and female 0.5; such values allow interpreting the intercept value as referring to a generic child, with no sex assigned. LLCI, lower-level confidence interval (95%); ULCI, upper-level confidence interval (95%). σu: estimate of the residual error variance. σe: estimate of the intercept variance. −2LL: −2 Log likelihood. AIC: Akaike’s Information Criterion.