Table 1 Demographics and clinic characteristics of insomnia subtypes and healthy controls.

From: Insomnia subtypes characterised by objective sleep duration and NREM spectral power and the effect of acute sleep restriction: an exploratory analysis

 

Total insomnia

Control

Insomnia subtypes

p values

Effect size

SSDD

NSDD

NNS

Sex (F)

n = 99 (69)

n = 25 (14)

n = 26 (18)

n = 51 (32)

n = 22 (19)

0.08

0.23

Age (y)

46.2 ± 1.5d

30.3 ± 1.7abc

52.9 ± 2.7 cd

44.9 ± 2.0d

41.4 ± 3.3ad

< 0.001

0.24

BMI (kg/m2)

25.4 ± 0.5

26.6 ± 1.0

25.7 ± 1.0

25.9 ± 0.7

23.9 ± 1.1

0.17

0.03

ISI

19.3 ± 0.8d

3.0 ± 0.6abc

20.8 ± 0.8d

19.8 ± 0.6d

18.8 ± 0.9d

< 0.00

0.50

PSQI

13.2 ± 0.3d

3.9 ± 0.5abc

14.5 ± 0.6d

12.5 ± 0.4d

13.2 ± 0.8d

< 0.001

0.55

DASS-D

9.1 ± 1.0d

1.6 ± 0.5abc

11.8 ± 2.5d

7.4 ± 1.2d

9.6 ± 0.5d

 < 0.001

0.19

DASS-A

5.9 ± 0.7d

1.9 ± 0.6abc

7.4 ± 1.4d

4.6 ± 0.8d

7.2 ± 1.6d

0.003

0.13

DASS-S

13.8 ± 1.0d

2.9 ± 0.7abc

16.8 ± 2.3d

11.6 ± 1.1d

15.1 ± 2.2d

< 0.001

0.36

ESS

7.4 ± 0.6d

4.3 ± 0.6b

6.2 ± 1.0

8.2 ± 0.8d

6.9 ± 1.2

0.03

0.08

FSS

4.3 ± 0.2d

2.4 ± 0.2abc

4.5 ± 0.3d

4.1 ± 0.2d

4.5 ± 0.3d

< 0.001

0.26

  1. Values are expressed as mean ± SEM.
  2. BMI body mass index, ISI Insomnia severity index, PSQI Pittsburgh Sleep Quality Index, DASS Depression, Anxiety and Stress Scale (D depression, A Anxiety, S stress), ESS Epworth Sleepiness Scale, FSS Fatigue Severity Scale.
  3. aSignificantly different than subtype SSDD.
  4. bSignificantly different than subtype NSDD.
  5. cSignificantly different than subtype NNS.
  6. dSignificantly different than controls. Effect size based on Cramers phi and Kruskal–Wallis H test.
Back to article page