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(A) Correlation between oxy-Hb changes with PSQI scores. (B) Scatter plot of the oxy-Hb changes in channels 31, 37, and 43 changing with PSQI scores.
Note: Channels in red show that oxy-Hb changes was negatively correlated with PSQI scores.
Abbreviations: oxy-Hb, oxygenated hemoglobin; PSQI, Pittsburgh Sleep Quality Index.
