Table 1.
Group characteristics.
| Preterm born infants (n = 52) | Term born infants (n = 29) | p-valuea | |
|---|---|---|---|
| Male, N (%) | 26 (50) | 16 (55.2) | 0.66 |
| GA at birth, mean (SD), weeks | 27.16 (1.09) | 39.72 (1.02) | <0.001 |
| GA at MRI time, mean (SD), weeks | 40.05 (0.91) | 40.28 (1.29) | 0.38 |
| Birth weight, mean (SD), g | 930.5 (204.3) | 3289.3 (343.9) | <0.001 |
| Birth weight z-score, mean (SD)b | −0.09 (0.72) | −0.37 (0.77) | 0.11 |
| IVH, N (%) | 2 (3.8) | 1 (3.4) | 1.00 |
| PVL, N (%) | 2 (3.8) | 0 (0) | 0.54 |
| BPD, N (%) | 23 (44.2) | 0 (0) | <0.001 |
| PDA, N (%) | 25 (48.1) | 0 (0) | <0.001 |
| NEC, N (%) | 2 (3.8) | 0 (0) | 0.41 |
| Antenatal steroids, N (%) | 36 (69.2) | 0 (0) | <0.001 |
Abbreviations: IVH, intraventricular hemorrhage; PVL, periventricular leukomalacia assessed by MRI at TEA; BPD, broncho-pulmonary disease; PDA, patent ductus arteriosus; NEC, necrotizing enterocolitis; SD, standard deviation. aGroup characteristics were compared using independent sample t-tests for continuous variables, and Chi-square or Fisher’s exact test for categorical variables, as appropriate. bComputed as (weight—M)/SD, where the mean weight M and standard deviation SD were obtained according to the infant’s sex and gestational age (Voigt et al., 2006).