Top 20 links (according to the amplitude of regression coefficient x) among the selected 400 edges in community matrix K.

The brain regions that are involved in each of these 20 edges are listed in the first two columns. Among these links, 7 links are from right-hemisphere, 5 are from symmetric left- and right-hemisphere (bold), 5 are from nonsymmetric left- and right-hemisphere, 3 remaining are from left-hemisphere alone. The 3rd column is the regression coefficient, with the sign of the group difference (Healthy minus Patient). The 4th column is the P value of the edge by ranksum-test (we use ranksum-test as the distribution of some of the edges in community matrix K is not Gaussian). We find that 9 edges (in bold) are statistically significant (p = 0.05, ranksum-test, with Bonferroni correction. Here the single edge threshold is 0.05/650 = 7.69*1e-5, in which 650 is the average number of non-zero edges in K. The number of non-zero connections is obtained by counting the number of entries in the average community matrix K that are greater than 0.05).