Table 1.

Change from baseline (CFB) in sleep parameters upon wearing an ambulatory BP monitor^a,b

Sleep Parameters	Tertile 1	Tertile 2	Tertile 3
Stated duration of sleep (min)	406 (8.7)	489 (8.7)	568 (8.6)
CFB	38 (14.2)	−72 (18.3)	−92 (18.1)
P for change	0.004	<0.0001	<0.0001
Total sleep assessed (min)	289 (7.1)	377 (6.9)	453 (7)
CFB	14 (11.8)	−22 (15.8)	−98 (16.3)
P for change	0.1	0.1	<0.0001
Percent awake (%)	16 (1.1)	20 (1.1)	35 (1.1)
CFB	6 (1.4)	1 (1.6)	3 (1.5)
P for change	<0.0001	0.3	0.04
Wake after sleep onset (min)	41 (4.2)	62 (4.3)	105 (4.1)
CFB	24 (5.3)	0 (6.5)	−11 (5.8)
P for change	<0.0001	0.5	0.04
Sleep efficiency (%)	58 (1.3)	74 (1.3)	82 (1.4)
CFB	3 (1.7)	−2 (2.1)	−5 (2.2)
P for change	0.03	0.1	0.02

^aThe heterogenity in mean CFB between tertiles was <0.0001 for all parameters.

^bValues in parentheses are SEM.