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Errors bars (95% confidence intervals) of the median values of the power in the LB (<1.5 Hz) for healthy subjects (controls) and AD patients (fallers and nonfallers), averaged over 4-second intervals (–4 to 0, 0–4, and 4–8 s). There was a statistically significant difference (* p < 0.05) on Mann-Whitney intergroup comparison between controls and AD fellers. There were no statistically significant changes between the different intervals in any group.
