Table 1.

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

Sleep ParametersTertile 1Tertile 2Tertile 3
Stated duration of sleep (min)406 (8.7)489 (8.7)568 (8.6)
    CFB38 (14.2)−72 (18.3)−92 (18.1)
    P for change0.004<0.0001<0.0001
Total sleep assessed (min)289 (7.1)377 (6.9)453 (7)
    CFB14 (11.8)−22 (15.8)−98 (16.3)
    P for change0.10.1<0.0001
Percent awake (%)16 (1.1)20 (1.1)35 (1.1)
    CFB6 (1.4)1 (1.6)3 (1.5)
    P for change<0.00010.30.04
Wake after sleep onset (min)41 (4.2)62 (4.3)105 (4.1)
    CFB24 (5.3)0 (6.5)−11 (5.8)
    P for change<0.00010.50.04
Sleep efficiency (%)58 (1.3)74 (1.3)82 (1.4)
    CFB3 (1.7)−2 (2.1)−5 (2.2)
    P for change0.030.10.02
  • a The heterogenity in mean CFB between tertiles was <0.0001 for all parameters.

  • b Values in parentheses are SEM.