Table 1.
Perinatal and neurocognitive characteristics of term and preterm infants
| Term-born n = 270 | Preterm-born n = 82 | P value | |
|---|---|---|---|
| Gestational age (weeks), median (IQR) | 40 (39–40.9) | 32.6 (29.6–35.1) | — |
| Postmenstrual age (weeks), median (IQR) | 40.8 (39.4–42) | 41 (39.6–42.3) | P = 0.53 |
| Female sex, no. (%) | 133 (49%) | 40 (49%) | P > 0.99 |
| Scan HC (cm), mean ± SD | 34.7 ± 1.5 | 34.9 ± 1.8 | P = 0.36 |
| Birth HC (cm), mean ± SD | 34.3 ± 1.5 | 29.5 ± 3.6 | P < 0.005 |
| Birth weight (kg), mean ± SD | 3.31 ± 0.5 | 1.8 ± 0.76 | P < 0.005 |
| APGAR score 1 min, median (IQR) | 9 (8–9) | 7 (5–9) | P < 0.005 |
| APGAR score 5 min, median (IQR) | 10 (9–10) | 9 (8–10) | P < 0.005 |
| PWMLs, no. infants (%) | 36 (13%) | 32 (39%) | P < 0.05 |
| BSID-III, no. infants (%) | 210 (78%) | 47 (57%) | — |
| Age (months), median (IQR) | 18.4 (18–18.7) | 18.4 (18–19) | P = 0.87 |
| Gestation age (weeks), median (IQR) | 40 (39–40.9) | 31.9 (29.1–35.9) | — |
| Postmenstrual age (weeks), median (IQR) | 41.1 (39.4–41.8) | 41.1 (39–42.6) | P = 0.61 |
| Female sex, no. (%) | 106 (50%) | 24 (51%) | P > 0.99 |
| BSID-III motor, mean ± SD | 101.6 ± 9.8 | 99.3 ± 11.5 | P = 0.2 |
| BSID-III cognitive, mean ± SD | 100 ± 11 | 101 ± 12.7 | P = 0.3 |
| BSID-III language, mean ± SD | 96.3 ± 15 | 98.5 ± 16.4 | P = 0.23 |
| IMD score, median (IQR) | 26.9 (17–36.4) | 17.4 (10–29.6) | P < 0.005 |
| PWMLs, no. infants (%) | 33 (16%) | 19 (40%) | P < 0.005 |
Notes: IQR, interquartile range; APGAR, appearance, pulse, grimace, activity, and respiration. Missing data: scan HC (2 term/2 preterm), birth HC (17 term/9 preterm); birth weight (1 term); APGAR score (32 term/7 preterm); IMD (13 term/3 preterm).