Table 2.

Actigraphic sleep-wake indices (mean ± SD), by group and in relation to treatment.

Actigraphy indices	Baseline			During light administration
	Healthy volunteers	PBC	Cirrhosis	Healthy volunteers	PBC	Cirrhosis
	(n = 2)	(n = 11)	(n = 5)	(n = 2)	(n = 11)	(n = 5)
Time in bed (min)	399 ± 54	437 ± 51	463 ± 38	404 ± 96	437 ± 34	465 ± 50
Total sleep time (min)	383 ± 50	403 ± 63	406 ± 38	386 ± 90	405 ± 45	428 ± 56
Sleep onset latency (min)	7 ± 0	11 ± 16	13 ± 15	7 ± 0	6 ± 8	8 ± 8
Wake after sleep onset (min)	9 ± 4	23 ± 7	44 ± 46	10 ± 5	26 ± 14	29 ± 26
Number of awakenings (n)	2.6 ± 0.3	2.4 ± 1.3	4.9 ± 2.5	2.2 ± 0.9	2.5 ± 0.7	4.1 ± 2.9
Sleep efficiency (%)	96 ± 1	92 ± 17	88 ± 11	96 ± 1	93 ± 4	92 ± 7