Table III.

Average power in each frequency band by sleep stage and twin pair

	CFS Twin	Non-CFS Twin
Power, μV2	Mean (standard deviation)	Mean (standard deviation)
Stage 1
Beta	149.4 (29.2)	140.5 (24.5)
Sigma	122.5 (21.9)	124.8 (30.1)
Alpha	185.5 (35.5)	199.7(88.6)
Theta	272.3 (38.6)	277.9 (72.5)
Delta	530.7 (62.7)	538.1 (108.8)
Stage 2
Beta	130.7 (25.3)	127.8 (25.1)
Sigma	166.9 (71.1)	159.2 (51.9)
Alpha	247.9 (87.5)	247.3 (112.3)
Theta	323.5 (39.2)	318.2 (66.4)
Delta	774.4 (79.6)	759.7 (128.6)
Slow Wave Sleep
Beta	119.8 (20.3)	118.4 (22.4)
Sigma	149.9 (59.8)	145.3 (44.3)
Alpha	272.3 (127.4)	275.6 (125.6)
Theta	375.6 (47.1)	374.4 (71.0)
Delta	1,276.4 (138.4)	1,205.1 (331.4)
REM
Beta	135.5 (31.2)	128.7 (26.7)
Sigma	95.5 (16.4)	99.1 (19.4)
Alpha	154.7 (25.7)	158.1 (61.7)
Theta	240.5 (35.3)	243.1 (47.2)
Delta	411.0 (55.5)	397.2 (80.3)