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Table 1 Descriptive statistics for the sample we investigated in this study

From: Epidemiological differences in levels of depressive signs among nocturnal symptoms of insomnia; results from the HUNT study

  

Sleep onset

(SOI)

Maintenance

(MI)

Terminal

(TI)

SOI + MI

MI + TI

SOI + TI

All

symptoms

Tot. Cases

Controls

Total

N

 

733

1333

470

516

527

96

642

4317

3616

7933

Females %

 

72

71.6

62.1

80.8

69.6

80.2

81.9

73.2*

57.9

66.2

Age M (SD)

 

49.5 (17.8)

53.3 (16.3)

57.9 (15.2)

52.6 (15.3)

56.2 (14.2)

59.7 (18.1)

56.1 (15.4)

53.9 (16.2)*

44.6 (14.7)

49.7 (16.2)

HADS-D M (SD)

Tot.

4.0 (3.2)

3.4 (2.9)

4.1 (3.0)

4.6 (3.2)

4.3 (3.1)

5 (3.4)

5.2 (3.6)

4.1 (3.2)*

1.9 (2.1)

3.2 (2.8)

Females

3.7a

3.2a

3.9a

4.4a

4.0a

4.3a

5.0a

3.9a

1.7a

2.8a

Males

4.5

4.1

4.6

5.3

5.0

8.1

6.2

4.7

2.2

3.3

  1. *significantly different (α = 0.05) between cases and controls
  2. asignificantly lower (α = 0.05) than in males