TABLE 3.

Standardized coefficient β of consecutive pulse waves versus hemodynamic parameter.

	Controls n: 34 Average (±SD)	OSA n:22 Average (±SD)	P-value	d
HR SCB	−0.01 (0.28)	−0.06 (0.23)	0.483	0.19
SBP SCB	−0.16 (0.38±)	0.05 (±0.29)	0.031	0.32
SV SCB	−0.07 (±0.29)	0.09 (0.22)	0.033	0.62

Average (standard deviation) of the standardized coefficient β (SCB), which was calculated by regression analysis of the measured hemodynamic value against each consecutive pulse wave. Controls demonstrated a negative SCB and thus decline of heart rate (HR), systolic blood pressure (SBP), and stroke volume (SV) during the 25-min period. In the OSA group, this decrease was attenuated or in case of stroke volume even inverted. The detected significance values and the effect size (d = Cohen’s d) are listed in the last two columns.