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White matter abnormality scores for the control and ELBW infants:
| White matter abnormality score | P value (compared to controls) | |
|---|---|---|
| Controls (term infants) | 6.0 ± 0.0 | N/A |
| ELBW infants without blood product deposition on MRI | 6.2 ± 0.3 | 0.17 |
| ELBW infants withblood product deposition on MRI but no IVH diagnosis | 6.7 ± 0.9 | 0.02 |
| ELBW infants with grades 1 or 2 IVH diagnosis | 7.5 ± 1.7 | 0.003 |
| ELBW infants with grades 3 or 4 IVH diagnosis | 8.6 ± 1.3 | 0.0001 |
