Table 3.
Domain/Measure | Parameter Estimate | Parameter 95% CI | P Value from GLM |
Executive function | |||
Composite score | 0.096 b | 0.016 to 0.177 | .019 |
Wisconsin Card Sort Test | |||
Total errors | −0.022 b | −0.028 to −0.015 | <.001 |
Perseverative errors | −0.016 b | −0.025 to −0.007 | <.001 |
Nonperseverative errors | −0.027 b | −0.036 to −0.018 | <.001 |
Trail Making Test | |||
Trails A time | 0.0000 | −0.0002 to 0.0002 | .778 |
Trails B time | 0.0001 b | 0.0000 to 0.0002 | <.001 |
Trails B regressed on Trails A | −0.628 b | −1.272 to 0.017 | 0.056 |
Verbal Fluency Test | |||
Letter fluency (total correct) | 0.001 | −0.004 to 0.007 | .672 |
Category fluency (total correct) | 0.0005 | −0.004 to 0.005 | .811 |
Ruff Figural Fluency Test | |||
Ruff Figural Fluency (total correct) | 0.005 b | 0.002 to 0.007 | <.001 |
Working memory | |||
Composite score | 0.030b | −0.012 to 0.072 | .168 |
WAIS Digit Span | |||
Forward last correct | 0.012b | −0.002 to 0.026 | .091 |
Backward last correct | 0.009 | −0.006 to 0.023 | .249 |
Letter-Number Sequencing (LNS) | |||
LNS scaled score | 0.011b | 0.002 to 0.020 | .012 |
Auditory N-Back | |||
0-Back d-prime | −0.002 | −0.004 to −0.000 | .037 |
2-Back d-prime | −0.001 | −0.007 to 0.004 | .640 |
Neuromotor function | |||
Grooved Peg Board dominant hand time | 0.00003 | −0.00004 to 0.00009 | .408 |
Finger Tap total taps for trials 1–3 | 0.003b | 0.001 to 0.006 | <.001 |
WAIS | |||
Full-scale IQ estimate | 0.327b | 0.093 to 0.560 | .006 |
WAIS info total scaled score | 0.083 | −0.024 to 0.191 | .128 |
WAIS picture completion total scaled score | 0.083b | −0.003 to 0.169 | .060 |
Verbal memory | |||
Composite score | −0.017 | −0.067 to 0.034 | .526 |
CVLTc trial 5 | −0.008 | −0.031 to 0.016 | .511 |
CVLT total learning slope trials 1–5 | −0.009 | −0.038 to 0.021 | .565 |
Note: Bolded values are statistically significant at the P = .05 level; GLM, generalized linear models; CVLT, California Verbal Learning Test; WAIS III, Wechsler Adult Intelligence Scale III.
All adjusted for gestational age.
Parameter indicates worse performance for lower birth weight.
All CVLT scores are standard scores.