TABLE 7

Outcomes of the Intervention Observed at 12 Months of Corrected Age on IQ at 20 Years of Age in the Re-enrolled Sample (≤1800 g)

Outcome at 1 yIQ at 20 yP
IQ <90IQ ≥90
Factorial scorea of weight during first year of CA−0.16 ± 0.960.01 ± 0.89.01
Factorial scorea of height increase during first year of CA−0.24 ± 0.950.07 ± 0.97.01
Factorial score of head circumference during first year of CA−0.12 ± 0.950.15 ± 0.98.03
Head circumference at 1 y of CA per 50th percentile of expected head circumference for age and sex × 10097 ± 3.1398 ± 2.72.01
Factorial scorea of maternal feeling of stress
 At 41 wk0.12 ± 0.93−0.14 ± 1.15.04
 At 1 y of CA−0.13 ± 0.900.28 ± 0.99.00
HOME test at 1 y of CA
 All 5 subscales37.5 ± 6.2440.4 ± 5.32.00
 Family cognitive stimulation subscale4.4 ± 2.345.6 ± 2.46.00
 Structured environment subscale5.5 ± 1.495.8 ± 1.26.02
  • Data are presented as mean ± SD.

  • a Factorial score of weight, height, and head circumference at 40 weeks’ CA and 3, 6, 9, and 12 months’ CA.