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Descriptive statistics for 113 individuals with LBW^a and 100 normal birth weight controls^b followed up at age 19 years
LBW (n = 113) Mean (SD) Controls (n = 100) Mean (SD) Unpaired t Test, P Value Cohen d Effect Size
Birth wt (g) 1546 (345) ≥3000 
Gender: male/female 49/64 46/54 
Gestational age at birth (wk) 32.1 (3.1) ≥37 
Apgar score at 1 min 7.3 (2.2) 
Apgar score at 5 min 8.4 (1.1) 
Postnatal cerebral ultrasound classification^c 0.3 (0.7) 
Age at scanning (yr) 18.7 (0.8) 18.4 (0.7) .003 0.40
Height at 19 years (cm) 168.0 (8.3) 173.3 (10.6) <.001 0.56
FBV (cm³) 952 (101) 1024 (129) <.001 0.62
FBV as area (cm²) 96,4 (11.2) 101.5 (6.8) <.001 0.55
Total CC area, uncorrected (mm²) 553.4 (98.3) 584.1 (82.7) .014 0.34


a Birth weight <2000 g.

b Gestational age ≥37 weeks and birth weight ≥3000 g.


c Classification of findings at cerebral ultrasound during first week of life: 0 = normal, 1 = subependymal hemorrhage, 2 = intraventricular hemorrhage without dilated ventricles, 3 = intraventricular hemorrhage with dilated ventricles, and 4 = parenchymal hemorrhagic infarction (missing: 54).