Table 3.

Associations between Autonomic Indices and Disease Status and Sleep Stage: P Values from Two-Way Repeated Measures ANOVA on Autonomic Indices with Disease Status as the Unrepeated Factor and Sleep Stage as Repeated Factor (n = 31)^a

Autonomic index	Disease status	Sleep stage	Interaction
SDNN	<0.001	<0.001	0.351
SDANN	0.016	0.062	0.625
RRIHF	0.007	0.028	0.613
RRILHR	0.625	<0.001	0.977
mRRI	0.045	<0.001	0.243
BRSPTT	<0.001	0.010	0.347

^aP values are shown in bold if <0.05 or italics if 0.05 ≤ p < .1.