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FIG 4. A, Fractal dimensions in the AD group plotted for the anterior region and the posterior region. Statistical analysis with the Wilcoxon signed rank test showed that the fractal dimension was significantly greater (*P < .01) in the posterior region than the anterior region in the AD group. A/P ratio = 0.952.
B, Fractal dimensions in the VaD group plotted for the anterior region and the posterior region. Statistical analysis with the Wilcoxon signed rank test showed that the fractal dimension was significantly greater (*P < .01) in the anterior region than the posterior region in the VaD group. A/P ratio = 1.163
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