TABLE 1

Characteristics of the 12-Year-Old Cohort

PretermTerm
Brain InjuryNo Brain Injury
Number of subjects at inceptiona58408
Proportion surviving to NICU discharge, n (%)42/58 (72)398/408 (98)b
Proportion surviving to 12 y, n (%)39/58 (67)395/408 (97)b
Follow-up at 12 years (%)34/39 (87)337/395 (85)111
Child characteristics
    Male gender, n (%)21 (62)181 (54)51 (46)
Social factors
    Maternal years at birth, mean (SD)27.5 (5.6)27.5 (6.1)29.3 (6.0)
    Maternal years of education, mean (SD)13.8 (2.7)13.4 (2.3)14.3 (2.8)
    Maternal education less than high school, n/N (%)3/34 (9)38/336 (11)9/111 (8)
    Single parent household, n/N (%)11/34 (32)115/332 (35)31/111 (28)
    Minority status by maternal report, n/N (%)8/34 (24)100/337 (30)34/111 (31)
Neurosensory impairment
    Abnormal neurologic examination, n/N (%)17/34 (50)23/337 (7)b0
    Cerebral palsy, n/N (%)17/34 (50)17/337 (5)b0
    Ventriculo-peritoneal shunt, n/N (%)7/34 (21)1/337 (0.3)b0
    Seizure disorder, n/N (%)6/33 (18)5/327 (1.5)b0
    Hearing aids, n/N (%)4/33 (12)8/323 (2.5)b0
    Blind services, n/N (%)5/32 (16)4/325 (1.2)b0
    Any neurosensory impairment, n/N (%)21/34 (62)34/333 (10)b0
Glasses, n/N (%)15/33 (46)109/327 (33)33/111 (30)
Mean age at assessment, mean (SD), y12.2 (0.4)12.2 (0.4)12.7 (0.8)
  • a Some children died or were discharged before near-term cranial ultrasound and could not be classified into the 2 subgroups (brain injury versus no brain injury).

  • b Preterm children with brain injury versus no brain injury, P < .05 (Fisher's exact test).