Table 1:
Characteristics of preterm samples and term reference samplea
| Birth and Maternal Data | Full Preterm Sample with Early MRI (n = 83) | Preterm Sample with Additional Term MRI (n = 77) | Term Reference Sample (n = 38) |
|---|---|---|---|
| Gestational age at birth (wk) | 28+4 [26+6–29+3], 23+6–30+6 | 28+5 [26+6–29+3], 23+6–30+6 | 39+6 [39–40+3], 38+2–41+3 |
| Birth weight (g) | 1068 (312), 494−1886 | 1076 (322), 494−1886 | 3509 (317), 2932−4330 |
| Birth head circumference (cm) | 25.62 (2.38), 20.5–30.5, n = 80 | 25.64 (2.43), 20.5–30.5, n = 75 | 34.71 (1.12), 32.5–37, n = 31 |
| Males | 49 (59%) | 46 (60%) | 19 (50%) |
| Multiple births | 24 (29%) | 21 (27%) | 0 (0%) |
| Premature rupture of membranes | 19 (23%) | 18 (23%) | 4 (12%) n = 33 |
| Cesarean delivery | 60 (72%) | 56 (73%) | 9 (27%) n = 33 |
| Chorioamnionitis | 14 (17%) | 13 (17%) | |
| Antenatal steroids | 62 (75%) | 57 (74%) | |
| Magnesium sulphate | 43 (65%), n = 66 | 41 (65%), n = 63 | |
| Higher social risk | 40 (48%) | 34 (44%) | 5 (16%) n = 31 |
Note:—IQR indicates interquartile range.
a
Early MRI, 29 to 35 weeks PMA; term MRI, 40 to 42 weeks PMA. Data are No. (%), median [IQR] or mean (SD), range.