Table 4.

HF band power (ms²/s) across different sleep stages in median with its interquartile range.

Variables	PoTS	Controls	p Value
Sleep stage 2	333.10 (188.72 – 600.79)	250.91 (155.79 – 969.79)	0.975
Slow wave sleep	342.34 (181.68 – 621.52)	237.18 (166.18 – 678.45)	0.386
REM	227.39 (112.47 – 749.35)	176.39 (62.62 – 389.17)	0.192