TABLE 3

Multiple Linear Regression Models Comparing Cognitive Performance Among VLBW and Term Born Young Adults.

MeasureTaskAdjusted Group Difference, % (95% CI)aP
Reaction time, msbSRT
    Model 14.20 (1.40 to 7.10).004
    Model 23.50 (0.70 to 6.30).016
    Model 33.10 (−0.10 to 0.30).054
CRT
    Model 13.30 (0.30 to 6.30).029
    Model 23.00 (−0.01 to 6.00).051
    Model 33.10 (−0.30 to 6.60).074
WM
    Model 18.70 (4.10 to 13.50)<.001
    Model 28.20 (3.60 to 13.00)<.001
    Model 39.20 (3.90 to 14.70).001
DA
    Model 17.40 (3.00 to 12.10).001
    Model 26.60 (2.20 to 11.30).003
    Model 34.00 (−0.80 to 9.10).100
AL
    Model 16.80 (1.90 to 12.00).007
    Model 26.20 (1.30 to 11.30).014
    Model 35.68 (0.10 to 11.60).047
Accuracy, % correctcAL
    Model 1−5.60 (−7.50 to −3.60)<.001
    Model 2−5.50 (−7.50 to −3.50)<.001
    Model 3−5.30 (−7.50 to 3.10)<.001
  • Model 1, adjusted for gender and age (n = 318); model 2, adjusted for gender, age, and parental educational attainment (dummy-coded with the lowest of 4 groups as a the reference group; n = 314); model 3: model 2 and adult head circumference (n = 295).

  • a A positive value indicates a longer reaction time for VLBW individuals.

  • b Linear regression comparing logarithm (log 10) reaction times on CogState tasks.

  • c The group mean difference in absolute percentage is reported. A negative value means lower accuracy for VLBW individuals.