Table 1: Demographic and medical characteristics.

CharacteristicPT childrenFT childrenGroup differences
(n= 110)(n= 39)

Gender
 Male, n (%)63 (57%)21 (54%)ns
 Female, n (%)47 (43%)18 (46%)
Gestational age (weeks)
 M (SD), range31.16 (2.63), 24–3439.82 (0.97), 37–41PT < FT
 ≤ 28, n (%)19 (17%)
 29-32, n (%)34 (31%)
 33-34, n (%)57 (52%)
Birthweight (grams)
 M (SD), range1556.02 (480.98), 490–24003372.56 (345.89), 2500–4258PT < FT
1 min. Apgar score
 M (SD), range7.65 (1.89), 1–98.95 (0.32), 7–9PT < FT
5 min. Apgar score
 M (SD), range8.9 (1.3), 2–109.9 (0.31), 9–10PT < FT
Ventilation duration (days)
 M (SD), range17.02 (34.85), 0–205--
Hospitalization duration
 M (SD), range44.32 (36.70), 9–2052.95 (0.89), 2–5PT > FT
Maternal age at birth (years)
 M (SD), range31.54 (5.86), 19–5133.03 (4.18), 27–41ns
Maternal education (years)
 High-school education n (%)21 (19%)4 (10%)
 Non-academic professional19 (17%)4 (10%)
 education n (%)46 (42%)22 (57%)ns
 Undergraduate degree n (%)24 (22%)9 (23%)
 Master’s and/or doctoral
 degree n (%)
Income
 Below median n (%)23 (21%)3 (8%)
 Median range n (%)71 (64%)28 (72%)ns
 Above median n (%)16 (15%)8 (20%)

p < .01.