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Table 3. Peritumoral tensor metrics measurements in classic and atypical meningiomas
Tensor Metric Classic Meningioma Atypical Meningioma P Value 95% CI
FA 0.192 ± 0.070 0.191 ± 0.037 .969 −.058–.60
FA ratios 0.39 ± 0.16 0.37 ± 0.09 .743 −.115–.158
ADC 1.674 ± 0.271 1.544 ± 0.110 .210 −.086–.348
ADC ratios 2.09 ± 0.37 1.97 ± 0.19 .423 −.192–.433
λ₁ 1.988 ± 0.255 1.863 ± 0.125 .216 −.084–.334
λ₁ ratios 1.57 ± 0.29 1.47 ± 0.05 .386 −.130–.318
λ₂ 1.653 ± 0.293 1.507 ± 0.129 .203 −.091–.382
λ₂ ratios 2.36 ± 0.54 2.19 ± 0.52 .512 −.377–.724
λ₃ 1.382 ± 0.321 1.273 ± 0.119 .363 −.146–.364
λ₃ ratios 3.71 ± 1.82 3.50 ± 0.80 .759 −1.259–1.679
Note:—Data are the mean ± SD. Unit of λ₁, λ₂, λ₃, and ADC values is × 10⁻³ mm²/s. Tensor metric ratios were calculated by dividing the mean values of each tensor metric in the affected hemisphere by that in the contralateral NAWM. CI indicates confidence interval; FA, fractional anisotropy; ADC, apparent diffusion coefficient.