Table 3.

Summary Cardiovascular Measures and Spectral Indices of Heart Rate and Blood Pressure Variability

Cardiovascular Measure	Supinea		Standinga		P Values
	Control	OSAS	Control	OSAS	Group	Condition	Group x Condition
Mean RRI, ms	785 ± 34.7	803.6 ± 36.6b	580.6 ± 47.7c	601.2 ± 31.2c	0.103	< 0.001	0.079
Mean blood pressure, mm Hg
Systolic	104.9 ± 4.4	98.2 ± 5.7	96.2 ± 9.25	83.4 ± 7.93	0.742	0.446	0.110
Diastolic	52.2 ± 3.4	41.3 ± 5.2	58.2 ± 2.7	44.8 ± 6.4	0.033	0.249	0.768
HFPRRI, ms2	1430 ± 469	3321 ± 1438	325.3 ± 77.4	516 ± 136c	0.192	0.018	0.274
LHR	1.6 ± 0.5	0.39 ± 0.13	3.73 ± 0.68c	1.58 ± 0.34b	0.002	0.002	0.296
LFPSBP (mmHg2)	4.8 ± 2.1	8.2 ± 2.6	17.88 ± 6.33	32.37 ± 8.16c	0.168	< 0.001	0.232

^aData are presented as mean ± SEM. OSAS refers to obstructive sleep apnea syndrome; see Appendx 2 for definition of abbreviations.

^bSignificantly different from controls in the same condition.

^cSignificantly different from the same group in supine condition.