TABLE 3.

Outcomes at 18 to 22 Months’ Corrected Age According to Weight Gain Quartile

OutcomeaQuartile 1 (n = 124)Quartile 2 (n = 122)Quartile 3 (n = 123)Quartile 4 (n = 121)Pb
Weight gain, mean (SD), g/kg per d12.0 (2.1)15.6 (0.8)17.8 (0.8)21.2 (2.0)
Normal neurologic examination70777686<.01
CP, %2113136<.01
MDI75.7 (18)77.7 (18)79.7 (18)80.9 (15).32
MDI < 70, %39373421<.01
PDI74.8 (19)77.5 (19)81.5 (17)83.3 (14)<.01
PDI < 70, %35321814<.001
Blind, %.21
    Unilateral1104
    Bilateral3101
Hearing impairment, %5632.36
Hearing aids, %3321.69
Neurodevelopmental impairment, %55494129<.001
Weight <10th percentile, %58615146.03
Length <10th percentile, %47432928<.001
Head circumference <10th percentile, %31181822.098
Rehospitalization, %63605045<.01
  • a Missing data for quartiles 1 to 4, respectively: CP: 2, 5, 3, 6 infants; neurologic examination: 2, 5, 5, 6; MDI scores: 13, 11, 13, 11; PDI scores: 12, 14, 17, 14; blindness: 3, 4, 3, 7; hearing impairment, hearing aids: 5, 4, 4, 6; NDI: 8, 11, 15, 12; weight <10th %: 5, 6, 5, 8; length < 10th %: 4, 4, 4, 7; head circumference <10th %: 3, 4, 4, 7.

  • b Kruskal-Wallis test for continuous variables; Mantel-Haenszel χ2 or Fisher’s exact test for categorical variables, as appropriate.