Table 1.
Clinical characteristics of preterm infants and full-term control infants.
| Preterm Infants, n=66 | Healthy Full-term Infants, n=66 | P-value | |
|---|---|---|---|
| Perinatal Characteristics | |||
| Birth gestational age, wk, mean ± SD [range] | 27.36 ± 2.68 [22.4 - 32] | 39.48 ± 0.99 [37.3-41.3] | <0.0001 |
| Birthweight, g, mean ± SD [range] | 931 ± 305 [480-1500] | 3373 ± 356 [2590-4011] | <0.0001 |
| Small for gestational age1, n (%) | 9 (14) | 6 (9) | 0.41 |
| Male, n (%) | 29 (44) | 36 (55) | 0.76 |
| Native American; Hispanic; White Asian; Black; Multiethnic, n (%) | 0; 15 (23); 9 (14) 0; 39 (59); 3 (4) |
2 (3); 6 (9); 16 (24) 5 (8); 24 (51); 3 (5) |
0.021 |
| Vaginal delivery, n (%) | 27 (40) | 45 (68) | 0.0017 |
| Apgar score at 5 min, median [range] | 8 [1-9] | 9 [8-10] | <0.001 |
| Maternal age, y, mean ± SD | 27.91 ± 5.9 | 29.2 ± 7.18 | 0.26 |
| MRI Characteristics | |||
| Postmenstrual age at MRI, wk, mean ± SD [range] | 40.21 ± 1.56 [37.4-44.4] | 41.1 ± 1.1 [38.4-44.3] | 0.0002 |
| Day of life at MRI, d, mean ± SD [range] | 89.97 ± 21.4 [41-137] | 11.21 ± 4.88 [4-20] | <0.0001 |
| Head circumference at MRI, cm, mean ± SD [range] | 33.26 ± 2 [27-37] | 35.71 ± 1.09 [32-39] | <0.0001 |
| Weight at MRI, g, mean ± SD [range] | 2818 ± 681 [1870-5400] | 3596 ± 422 [2475-4470] | <0.0001 |
1
SGA if BW less than the 10% percentile for sex and GA, based on the Fenton growth chart