Table 1 Sample characteristics of very preterm and term-born participants.

From: Altered brain metabolism contributes to executive function deficits in school-aged children born very preterm

 

VPT

(n = 68)

TB

(n = 70)

p

Female

29 (42.7)

34 (48.6)

0.60

Age at assessment (in years), mean (SD), range

10.8 (1.2), 8.8–13.4

11.1 (1.3), 8.2–13.5

0.23

Socioeconomic statusa, mean (SD), range

7.9 (2.0), 4–12

9.6 (2.0), 6–12

<0.001

Gestational age (in weeks), mean (SD), range

29.3 (1.7), 26.0–31.7

39.7 (1.1), 37.3–42.0

<0.001

Birthweight (in g), mean (SD), range

1209 (320), 570–2020

3484 (466), 2370–4410

<0.001

Major brain lesionsb

2 (2.9)

–

 

BPDb,c

8 (11.8)

–

 

NECb

3 (4.4)

–

 

ROPb ≥ grade 3

0 (0.0)

–

 

IQ estimated, mean (SD), range

102.8 (15.3), 67.1–138.0

115.6 (13.7), 83.7–152.0

<0.001

Processing speed indexe, mean (SD), range

100.9 (10.6), 76.0–129.0

106.9 (11.5), 83.0–131.0

0.002

  1. Data are n (%) unless specified.
  2. VPT very preterm participants, TB term-born participants, BPD bronchopulmonary dysplasia, NEC necrotizing enterocolitis, ROP retinopathy of prematurity.
  3. aInformation on families’ socioeconomic status was missing for five VPT and four TB participants.
  4. bPerinatal data of term-born children as reported by parents. Inclusion criteria for TB children comprise no perinatal complications.
  5. cDefined as requirement for additional oxygen at 36 0/7 weeks postmenstrual age.
  6. dIQ estimate was missing for six VPT and one TB participants.
  7. eProcessing speed index was missing for five VPT and two TB participants.
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