Table 2. Comparisons of DKI-WM metrics of the posterior limb of the internal capsule among study groups.
FA | MD (×10−3 mm/s2) | AD (×10−3 mm/s2) | RD (×10−3 mm/s2) | Da(×10−3 mm/s2) | De,// (×10−3 mm/s2) | De,⊥ (×10−3 mm/s2) | |
---|---|---|---|---|---|---|---|
Preterm neonates | |||||||
Control group | 0.38 ± 0.02 | 1.16 ± 0.07 | 1.68 ± 0.08 | 0.90 ± 0.06 | 1.06 ± 0.17 | 1.93 ± 0.12 | 1.09 ± 0.11 |
Simple T2h group | 0.37 ± 0.03 | 1.18 ± 0.07 | 1.70 ± 0.07 | 0.92 ± 0.08 | 1.21 ± 0.19 | 1.95 ± 0.10 | 1.08 ± 0.09 |
Full-term neonates | |||||||
Control group | 0.39 ± 0.02 | 1.14 ± 0.05 | 1.67 ± 0.05 | 0.87 ± 0.05 | 1.04 ± 0.09 | 1.93 ± 0.07 | 1.07 ± 0.07 |
Simple T2h group | 0.38 ± 0.03 | 1.16 ± 0.05 | 1.68 ± 0.05 | 0.90 ± 0.06 | 1.07 ± 0.17 | 1.93 ± 0.08 | 1.08 ± 0.09 |
Complex T2h with HIE group | 0.33 ± 0.04 | 1.21 ± 0.06 | 1.68 ± 0.08 | 0.97 ± 0.07 | 0.87 ± 0.09 | 1.94 ± 0.08 | 1.19 ± 0.07 |
P value | |||||||
Preterm simple T2h vs. control group | 0.403 | 0.344 | 0.415 | 0.331 | 0.322 | 0.380 | 0.404 |
Full-term simple T2h vs. control group | 0.095 | 0.350 | 0.918 | 0.215 | 0.551 | 0.815 | 0.483 |
Preterm simple T2h vs. full- term simple T2h group | 0.564 | 0.500 | 0.637 | 0.474 | 0.076 | 0.328 | 0.896 |
Full-term simple T2h vs. complex T2h with HIE group | 0.001 | 0.030 | 0.781 | 0.005 | 0.013 | 0.622 | 0.009 |
Note: data presented as means ± SDs. AD, axial diffusivity; Da, intra-axonal diffusivity; De,//, extra-axonal axial diffusivity; De,⊥, extra-axonal radial diffusivity; FA, fractional anisotropy; MD, mean diffusivity; RD, radial diffusivity.