Figure 2 | Scientific Reports

Figure 2

From: Difference in spectral power density of sleep EEG between patients with simple snoring and those with obstructive sleep apnoea

Figure 2

Partial correlations between AHI and absolute beta power during NREM sleep. (a) Partial correlation between AHI and absolute beta power during NREM period controlling for age and sex in the OSA group (r = 0.251, p corr = 0.027). (b) Partial correlation between AHI and absolute beta power during NREM period controlling for age and sex in total participants (r = 0.340, p corr <0.001). AHI, apnoea-hypopnea index; NREM, non-rapid eye movement; OSA, obstructive sleep apnoea; r, Pearson’s r; Log transformation for spectral EEG was performed before Pearson correlation analysis when both variables deviate from the normal distribution. p corr, p value after Bonferroni correction (uncorrected p value × 6) for correction of multiple comparisons.

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