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Multivariable regression model of verbal, performance and full IQ scores.
| Variables | Parameter estimate |
SE | t value | P value |
|---|---|---|---|---|
| Verbal IQ | ||||
| Intercept | 85.33 | 3.87 | 22.05 | <.0001 |
| UHL | −4.51 | 2.04 | −2.21 | .028 |
| Maternal education level | 6.33 | 1.12 | 5.64 | <.0001 |
| Performance IQ | ||||
| Intercept | 89.10 | 3.75 | 23.77 | <.0001 |
| UHL | −2.82 | 1.98 | −1.42 | .1561 |
| Maternal education level | 4.45 | 1.09 | 3.90 | .0001 |
| Full IQ | ||||
| Intercept | 85.79 | 3.70 | 23.22 | <.0001 |
| UHL | −4.06 | 1.95 | −2.08 | .0384 |
| Maternal education level | 5.89 | 1.07 | 5.50 | <.0001 |
