Skip to main content

Table 2 Sample Characteristics

From: Mapping of the Insomnia Severity Index and other sleep measures to EuroQol EQ-5D health state utilities

 

Number

%

Mean Age (SD) (Years)

Mean (SD)

EQ-5D

Mean Duration (SD) (Hours)

Mean ISI

(SD)

Whole sample

2,842

100

42.9 (15.7)

0.765 (0.2)

7.8 (1.9)

14.1 (4.8)

Age group

      

   18-29

743

26.1

24.2 (3.8)

0.784 (0.2)

8.0 (1.9)

13.4 (4.6)

   30-39

569

20.0

34.7 (2.9)

0.754 (0.2)

7.7 (1.9)

15.0 (5.0)

   40-49

624

22.0

45.0 (2.8)

0.754 (0.2)

7.5 (1.8)

15.0 (4.7)

   50-59

405

14.3

54.9 (2.8)

0.749 (0.2)

7.5 (1.8)

14.2 (4.7)

   60-69

351

12.4

64.2 (2.9)

0.770 (0.2)

7.9 (1.9)

12.9 (4.5)

   ≥ 70

150

5.30

74.8 (4.6)

0.786 (0.1)

8.1 (1.6)

12.3 (4.7)

Gender

      

   Female

1,834

64.50

42.0 (15.9)

0.766 (0.2)

7.9 (1.9)

14.3 (4.8)

   Male

1,008

35.50

44.5 (15.2)

0.762 (0.2)

7.5 (1.8)

13.7 (4.7)

Race

      

   White

2,318

83.7

44.0 (15.7)

0.768 (0.2)

7.8 (1.8)

13.9 (4.7)

   Black

292

10.5

38.1 (14.7)

0.755 (0.2)

7.4 (2.1)

14.7 (5.1)

   Asian

44

1.60

26.7 (10.4)

0.805 (0.1)

7.4 (2.1)

13.7 (3.7)

   Other

116

4.20

38.3 (13.7)

0.719 (0.2)

7.5 (2.1)

15.7 (5.3)

Comorbidity

      

   No

1068

37.60

38.2 (14.4)

0.835 (0.1)

7.7 (1.8)

12.7 (4.3)

   Yes

1774

62.40

45.7 (15.8)

0.723 (0.2)

7.8 (1.9)

14.9 (4.9)

Sleep quality

      

   0

146

5.14

43.6 (13.4)

0.614 (0.2)

6.6 (2.5)

20.5 (5.1)

   1

94

3.31

43.7 (15.7)

0.697 (0.2)

7.2 (2.3)

18.3 (4.8)

   2

250

8.81

43.9 (14.2)

0.712 (0.2)

7.4 (2.2)

17.1 (4.6)

   3

457

16.10

44.0 (15.0)

0.755 (0.2)

7.7 (1.9)

15.5 (4.1)

   4

457

16.10

41.6 (14.8)

0.763 (0.2)

7.9 (1.8)

13.9 (4.0)

   5

559

19.70

43.3 (15.7)

0.795 (0.1)

7.8 (1.6)

12.9 (3.9)

   6

411

14.48

40.9 (16.8)

0.800 (0.1)

8.0 (1.6)

12.2 (3.7)

   7

291

10.25

42.7 (17.0)

0.804 (0.2)

8.0 (1.7)

11.6 (4.1)

   8

108

3.81

43.8 (17.8)

0.781 (0.2)

8.4 (1.8)

10.9 (4.0)

   9

35

1.23

40.5 (18.3)

0.858 (0.2)

8.5 (1.2)

11.7 (5.2)

   10

30

1.06

48.3 (17.6)

0.727 (0.3)

8.0 (2.2)

10.5 (5.7)

Next day sleepiness

      

   0

162

5.71

54.0 (15.8)

0.764 (0.2)

7.8 (2.0)

12.4 (5.4)

   1

100

3.52

49.3 (16.6)

0.805 (0.2)

8.0 (2.0)

12.2 (4.5)

   2

157

5.53

45.0 (16.9)

0.792 (0.2)

7.9 (1.8)

12.5 (4.0)

   3

213

7.51

46.0 (16.0)

0.788 (0.2)

7.8 (1.7)

12.4 (4.1)

   4

236

8.32

44.6 (16.1)

0.776 (0.2)

7.8 (1.8)

13.0 (4.1)

   5

373

13.15

44.4 (15.6)

0.781 (0.2)

7.9 (1.8)

13.5 (4.3)

   6

436

15.37

40.9 (15.4)

0.783 (0.2)

7.8 (1.9)

13.5 (4.2)

   7

520

18.33

40.6 (14.2)

0.758 (0.2)

7.8 (1.8)

14.7 (4.6)

   8

364

12.83

38.4 (14.3)

0.747 (0.2)

7.7 (1.9)

15.6 (4.8)

   9

135

4.76

40.5 (13.7)

0.683 (0.2)

7.5 (2.1)

16.2 (5.3)

   10

141

4.97

39.2 (14.0)

0.710 (0.2)

7.2 (2.2)

18.1 (5.5)

Latency (minutes)

      

   < 15

443

17.39

44.2 (15.2)

0.808 (0.1)

7.7 (1.7)

11.9 (4.3)

   15-30

468

18.37

44.7 (16.5)

0.799 (0.2)

7.8 (1.7)

12.3 (4.1)

   30-45

449

17.62

42.9 (16.0)

0.791 (0.1)

7.8 (1.7)

13.5 (4.3)

   45-60

205

8.05

41.8 (15.0)

0.773 (0.2)

7.6 (1.7)

13.9 (4.3)

   60-90

404

15.86

42.3 (15.1)

0.752 (0.2)

7.8 (1.8)

14.6 (4.4)

   > = 90

579

22.72

40.5 (15.9)

0.729 (0.2)

8.0 (2.1)

15.9 (4.7)

Wake up times

      

   1

375

18.20

43.6 (15.4)

0.802 (0.2)

7.5 (1.7)

12.8 (4.3)

   2

732

35.6

44.5 (16.1)

0.780 (0.2)

7.7 (1.7)

13.6 (4.5)

   3

588

28.6

44.1 (15.6)

0.759 (0.2)

8.0 (1.8)

14.3 (4.4)

   4

184

8.90

44.9 (15.2)

0.743 (0.2)

8.3 (1.8)

15.6 (4.7)

   5

179

8.70

42.6 (13.0)

0.715 (0.2)

8.4 (1.8)

16.2 (4.6)