TABLE 1.

Perinatal, Sociodemographic, and Developmental Characteristics: Respondents Versus Nonrespondents

Respondents (N = 113)Nonrespondents (N = 43)P
Perinatal period
    Female gender, n (%)58 (51)25 (58).446
    Race, white, n (%)101 (89)26 (61).000
    Maternal education.064
        Low, n (%)34 (30)20 (49)
        Average, n (%)58 (51)15 (37)
        Above average, n (%)21 (19)6 (15)
    Gestational age ± SD, d197 ± 9197 ± 8.849
    Gestational age, wk.662
        25/26, n (%)22 (20)9 (21)
        27, n (%)22 (20)7 (16)
        28, n (%)29 (26)15 (35)
        29, n (%)40 (35)12 (28)
    Birth weight ± SD, g1112 ± 2331049 ± 218.129
    Birth weight <10th percentile, n (%)15 (13)5 (12).783
    Intubation at birth, n (%)30 (27)17 (40).114
    Surfactant rescue therapy, n (%)34 (30)14 (33).765
    T4 supplementation, n (%)58 (51)23 (54).809
    Oxygen at 36 wk, n (%)20 (18)9 (21).643
    Cerebral hemorrhage.046
        Grade 1, n (%)18 (16)7 (16)
        Grade 2, n (%)19 (17)3 (7)
        Grade 3, n (%)2 (2)0 (0)
        Grade 4, n (%)7 (6)1 (2)
    Ischemic brain damage, all grades, n (%)17 (15)5 (12).584
Development until age 5.5 y
    Neurologic outcome at 2 y
        Suspect, n (%)14 (12)11 (26).518
        Abnormal, n (%)12 (11)2 (5)
    Mean Mental Development Index at 2 y ± SD (N)*100 ± 2483 ± 22 (42).000
    Mean Psychomotor Development Index at 2 y ± SD (N)*88 ± 20 (110)88 ± 22 (41).987
    Neurologic outcome at 5.5 y
        Suspect, n (%)41 (36)13 (30).211
        Abnormal, n (%)13 (12)3 (7)
    RAKIT IQ at 5.5 y ± SD96 ± 1890 ± 19.048*
    CBCL total score at 5.5 y ± SD (N)51 ± 12 (109)55 ± 10 (36).036*
  • RAKIT indicates Revised Amsterdam Children’s Intelligence Test.

  • * As assessed by using the Bailey Scales of Infant Development, Dutch version 1983.25

  • A higher score means worse outcome.