Skip to main content

Table 2 Circadian rest-activity pattern and sleep

From: The circadian rest-activity pattern predicts cognitive decline among mild-moderate Alzheimer’s disease patients

 

Global

n=100

n (%) or median [p25;p75]

Rest-activity rhythm

 Interdaily stability

0.57 [0.49;0.63]

 Intradaily variability

0.80 [0.68;0.95]

 Relative amplitude

0.88 [0.84;0.92]

 M10

116 [83.6;151]

 L5

6.44 [4.48;9.93]

Sleep

 Time in bed, hours

8.98 [8.08;9.57]

 Total sleep time, hours

6.70 [5.54;7.56]

  < 7 h

56 (56.0%)

  7–9 h

39 (39.0%)

  > 9 h

5 (5.0%)

 Sleep efficiency, %

83.5 [78.1;88.4]

  ≥ 85%

44 (44.0%)

  84–75%

41 (41.0%)

  <  75%

15 (15.0%)

 Latency, minutes

22.0 [13.8;33.2]

  ≤ 30 min

69 (69.0%)

  31–60 min

25 (25.0%)

  >  60 min

6 (6.0%)

 WASO, minutes

39.4 [32.2;52.2]

  ≤ 30 min

20 (20.0%)

  >  30 min

80 (80.0%)

  1. L5 the mean activity of the five consecutive hours with the lowest activity, M10 the mean activity of the ten consecutive hours with the highest activity, n number, p percentile, WASO time spent awake after sleep onset