Statistical tests on the small-world properties of the networks for all the groups after the permutation test.

D_P, the P value of the difference between the normal control and AD group.P_P, the permutation P value of the difference between the normal control and AD group.Statistical tests on the small-world properties of the networks for all the groups of the permutation test.D_P，即正常对照组与阿尔茨海默病（Alzheimer's Disease, AD）组之间差异的P值；P_P，即正常对照组与AD组之间差异的置换P值；针对置换检验所有分组的网络小世界属性开展统计学检验。