Clinical demographics of study cohorta
| All Infants (n = 39) | No-Injury (n = 23) | Injury (n = 16) | P Value | |
|---|---|---|---|---|
| GA (weeks) | 39 (SD, 2) | 38 (SD, 2) | 39 (SD, 3) | .58 |
| BW (g) | 3237 (SD, 607) | 3176 (SD, 542) | 3325 (SD, 698) | .46 |
| 1- minute Apgar | 2 (SD, 2) | 2 (SD, 2) | 2 (SD, 2) | .91 |
| 5-minute Apgar | 4 (SD, 2) | 4 (SD, 2) | 3 (SD, 3) | .21 |
| Cord pH | 6.91 (SD, 0.11) | 6.9 (SD, 0.09) | 6.9 (SD, 0.13) | .23 |
| Base deficit | 16.6 (SD, 5.1) | 15.9 (SD, 4.7) | 17.6 (SD, 5.6) | .40 |
| 1st MR imaging (days) | 2.2 (SD, 0.5) | 2.3 (SD, 0.5) | 2.1 (SD, 0.7) | .48 |
| 2nd MR imaging (days) | 6.9 (SD, 2.7) | 6.8 (SD, 2.6) | 7 (SD, 2.9) | .85 |
| Time between MRIs (days) | 4.7 (SD, 2.5) | 4.5 (SD, 2.5) | 4.8 (SD, 2.8) | .72 |
| Poor clinical outcomeb at 24–36 months (%) (No.) | 21 (8) | 0 (0) | 50 (8) | <.001 |
Note:—GA indicates gestational age; BW, birth weight.
↵a Data are means unless otherwise indicated.
↵b Poor clinical outcome is defined as any of the following: Gross Motor Function Classification system levels 3–5, Mental Developmental Index score of <70 on the Bayley Scales of Infant Developmental III, visual impairment with no useful vision, tracheostomy, gastrostomy tube, and death.