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Table 1 Participant Characteristics Mean (SD) or %

From: Refining sleep measurement using the Motionwatch8©: how many days of monitoring do we need to get reliable estimates of sleep quality for older adults with mild cognitive impairment?

Participant Characteristic

All Participants

(N = 151)

Older Adults without Mild Cognitive Impairment (N = 69)

Older Adults with Mild Cognitive Impairment

(N = 82)

p-value*

Age

71.19 (7.26)

69.42 (6.36)

72.67 (7.66)

< 0.01

%Female

66.89%

76.81%

58.54%

0.03

Body Mass Index (kg/m2)

26.71 (5.05)

25.91 (5.16)

27.45 (4.87)

0.13

%Retired

77.48%

78.26%

76.83%

0.99

Education

Less than high school diploma

4.64%

1.45%

7.32%

0.26

High school diploma

13.91%

14.49%

13.41%

Trade school

11.26%

7.25%

14.63%

Some university

15.89%

14.49%

17.07%

University degree or higher

54.30%

62.32%

47.56%

Smoking History

Current Smoker

1.32%

1.45%

1.22%

0.96

Past Smoker

49.67%

50.72%

48.78%

Non-Smoker

49.01%

47.83%

50.00%

Comorbidities

Hypertension

26.49%

17.39%

34.15%

0.03

Hypercholesterolemia

17.22%

13.04%

20.73%

0.30

Arthritis

13.25%

13.04%

13.41%

0.99

Mood Disorder

7.95%

10.14%

6.10%

0.54

Hypothyroidism

15.89%

20.23%

12.20%

0.26

Cardiovascular Disease

16.56%

7.25%

24.39%

< 0.01

Diabetes Mellitus

2.65%

1.45%

3.66%

0.74

Cancer

1.99%

0.00%

3.66%

0.31

Number of Medications

2.27 (2.15)

2.01 (1.75)

2.49 (2.43)

0.17

Sleeping Medication Use

13.25%

17.39%

9.76%

0.26

Diagnosed Obstructive Sleep Apnea

3.57%

0.00%

7.17%

0.99

CPAPa Use

3.57%

0.00%

7.17%

0.99

MMSEb Score

28.89 (1.11)

29.22 (0.87)

28.61 (1.21)

< 0.01

MoCAc Score

24.79 (2.83)

27.19 (1.10)

22.77 (2.19)

< 0.01

Pittsburgh Sleep Quality Index Measures

Total Score

7.28 (4.00)

6.62 (5.44)*

7.47 (4.71)*

0.15*

Subjective Sleep Duration (min/day)

373.60 (73.43)

393.89 (111.30)*

363.23 (96.99)*

0.01*

MotionWatch8 Sleep Measures

Sleep Duration (min/day)

401.10 (51.23)

415.75 (79.05)*

390.18 (68.87)*

< 0.01*

Fragmentation Index

31.17 (11.03)

30.51 (16.68)*

32.71 (14.76)*

0.23*

Sleep Efficiency

82.57 (6.10)

82.95 (9.06)*

82.05 (8.52)*

0.40*

Sleep Latency (min/day)

6.72 (9.00)

6.14 (13.70)*

7.35 (11.88)*

0.41*

Wake After Sleep Onset (min/day)

85.70 (34.43)

84.92 (53.52)*

87.78 (47.40)*

0.63*

Wake After Sleep Onset (min/day)

85.70 (34.43)

84.92 (53.52)*

87.78 (47.40)*

0.63*

  1. *P-values refer to group differences (i.e., t-tests, chi-square, or ANCOVA) between Older Adults with Mild Cognitive Impairment and those without
  2. *Controlling for age, sex, sleep medication use
  3. aContinuous Positive Air Pressure Machine
  4. bMini Mental State Exam
  5. cMontreal Cognitive Assessment
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Sleep Science and Practice

ISSN: 2398-2683

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