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Table 3 Correlation between sleep stage percentages with P300 differences and average baseline occipital alpha power

From: Can electrophysiological tests be used as screening tools in detection of cognitive impairment in obstructive sleep apnea hypopnea syndrome?

  S1 (%) S2 (%) S3 (%) REM
P300 latency difference     
 Correlation coefficient 0.326 − 0.352 − 0.046 − 0.178
P value 0.173 0.140 0.852 0.465
P300 reaction time difference     
 Correlation coefficient − 0.133 − 0.077 0.218 − 0.060
P value 0.586 0.753 0.370 0.807
Average O alpha (baseline power before sleep)     
 Correlation coefficient 0.014 0.240 − 0.125 − 0.113
P value 0.955 0.323 0.611 0.644
Average O alpha (baseline power after sleep)     
 Correlation coefficient − 0.035 0.258 − 0.021 − 0.065
P value 0.887 0.286 0.932 0.790
Average O alpha difference     
 Correlation coefficient 0.030 − 0.194 0.290 − 0.039
P value 0.904 0.426 0.228 0.874
  1. O occipital