Table 5.
Multiple regression models (unstandardized coefficients (SE)) predicting non-verbal IQ (Leiter-R) at 4 ½ years in full term-born (FT: n = 49) and preterm-born (PT: n = 45) children from early language processing efficiency at 18 months (corrected for prematurity).
| Model 3a | Model 3b | Model 3c | Model 3d | Model 3e | |
|---|---|---|---|---|---|
| Age at test | 1.40 (0.87) | 1.59 (0.84) | 1.49 (0.84) | 1.56 (0.82) | 1.57 (0.80) |
| SES | 0.31 (0.23) | 0.22 (0.23) | 0.19 (0.23) | 0.24 (0.22) | 0.15 (0.22) |
| Group | −10.34 (3.89) ** | −8.83 (3.78) * | −35.36 (23.07) | −8.62 (3.72) * | 30.89 (16.95) |
| Acc | -- | 49.85 (17.64) ** | 28.52 (25.39) | -- | -- |
| Acc x Group | -- | -- | 40.89 (35.07) | -- | -- |
| RT | -- | -- | -- | −0.04 (0.01) ** | −0.01 (0.02) |
| RT x Group | -- | -- | -- | -- | −0.05 (0.02) * |
|
| |||||
| R 2 | 15.4 ** | 22.4 *** | 23.5 *** | 24.8 *** | 29.4 ** |
| r2-change | -- | 7.0 ** | 1.1 | 9.4 ** | 4.5 * |
Note: r2-change for Models 3b and 3d in reference to Model 3a; Models 3c and 3e in reference to Models 3b and 3d, respectively. SES: Scores on an updated version of the Hollingshead Four Factor Index of Social Status 65; Acc: Proportion looking to target on the looking-while-listening task 6; RT: Mean response time on the looking-while-listening task 6.
*
p < 0.05
**
p < 0.01
***
p < 0.001