Statistical comparisons between the selected features of the VaD patients and the controls in the three frequency bands.

Group mean value for each selected feature was calculated by averaging the feature values, the inter-regional functional connections, across all subjects in the VaD group or in the control group. Positive or negative feature values represent inter-regional functional correlations or anticorrelations, respectively. Statistical comparisons of the feature values between the VaD patients and the controls were estimated based on a two samples t-test. A positive (negative) t-value stands for a feature that was significantly increased (decreased) in the VaD group compared with the control group. The features are listed in order of decreasing weighted rank in the pattern discrimination. The symbol “**” represents significant difference determined by pp