Table 2.

Results of baseline and post-Yoga practice sleep, activity, and symptom assessments

Variables Median (Q1,Q3)		Baseline measurements	Post-3 months Yoga practice measurements	p value
Polysomnography	total sleep time (min)	402(336–456)	408(352–440)	0.68
	sleep efficiency (%)	82.2(71.4–91.3)	86.9(80.6–90.2)	0.25
	sleep onset latency (min)	18(12–34)	15(12–33)	0.30
	REM latency (min)	98(67–129)	111(76.5–142)	0.29
	Stage N1(%)	3.1(1.3–4.1)	2.5(1.7–3.4)	0.22
	Stage N2(%)	51.3(39.4–59.2)	48(45–55.5)	0.90
	Stage N3(%)	24.2(18.2–28.7)	24.6(18.7–31.3)	0.29
	Stage REM(%)	22.4(17.9–26.6)	20.5(15.5–23.8)	0.21
	Arousal index (/h sleep)	10.4(6.1–12.4)	8.2(6.8–10.5)	0.64
Actigraphy	time in bed (min)	532(499–551)	518(465–536)	0.13
	total sleep time (min)	421(375–456)	434(375–473)	0.82
	sleep efficiency (%)	80.2(77.7–84.9)	85.2(78.7–89.7)	0.11
	Arousals (n)	10.8(7–12.7)	7.9(6.7–10.6)	< 0.01
	naps (n)	0.3(0.17–0.5)	0.4(0–0.7)	0.20
	steps walked/day (n)	7406(5657–8853)	7060(6383–9717)	0.23
	Time spent > 3METs/day (min)	118(63–152.8)	85(64–130)	0.15
Questionnaires	Pittsburgh Sleep Quality Index	14(13–16)	8(7–11)	< 0.001
	HADS-A	9(7–11)	6(5–9)	0.02
	HADS-D	5(3–7)	2(1–4)	< 0.001
	Epworth Sleepiness Scale	6(3–9)	5(3–7)	0.04
	Pichot fatigue scale	14(11–20)	10(7–14)	0.01

HADS Hospital Anxiety Depression scale, REM rapid eye movement, METs metabolic equivalent of tasks