Table 2.

Relative Percentages of all Inter-state Transitions for the Forced Desynchrony Protocol Data.

Current stage	Next stage	Young Mean (S.D.)	Young Range	Older Mean (S.D.)	Older Range	T-test significance for age difference
NREM Sleep	REM Sleep	42 (5)	33–47	24 (6)	14–37	P<0.0001
NREM Sleep	Wake	6 (4)	2–13	21 (6)	10–29	P<0.0001
REM Sleep	NREM Sleep	35(6)	24–40	16 (6)	6–29	P<0.0001
REM Sleep	Wake	6 (3)	3–12	10 (4)	1–16	P=0.0212
Wake	NREM Sleep	10 (5)	6–18	27 (6)	13–34	P<0.0001
Wake	REM Sleep	1 (1)	0–2	2 (2)	0–5	P=0.0347

The mean (standard deviation) and range (minimum-to-maximum) of the average inter-state transition probabilities per subject across all sleep episodes in the forced desynchrony protocol. Note that only data from sleep episodes with <5% missing data are included in this table; data from all sleep episodes are included in the survival analyses.