Relationships between Obstructive Sleep Apnea Syndrome, Continuous Positive Airway Pressure Treatment, and Inflammatory Cytokines

Table 5

Results from correlations and regressions exploring relationships between serum IL-6 levels and polysomnographic parameters impacted by CPAP treatment.

	Correlation		Regression
	𝑟	𝑃	𝑡	𝑃
ΔMinimum SaO2	−0.220	0.290	0.165	0.871
ΔMean SaO2	−0.394	0.051	1.305	0.209
SaO2 ≥ 90 (% TST)	0.268	0.196	0.535	0.600
ΔESS	0.237	0.253	1.289	0.215
ΔAHI	−0.005	0.982	1.333	0.200
ΔREM	−0.057	0.787	−0.716	0.484
ΔNREM	−0.094	0.655	−0.436	0.668

Minimum SaO₂: the lowest oxygen saturation recorded during sleep; mean SaO₂: the average oxygen saturation recorded during sleep; SaO₂ ≥ 90 (% TST): the amount of total sleep time spent at ≥90% saturation; ESS: Epworth sleepiness scale; AHI: apnea-hypopnea index.