Table 1 Demographics, questionnaires and actigraphy results.

From: Dynamics of working memory process revealed by independent component analysis in an fMRI study

Variables

MT (N = 29)

ET (N = 29)

Sign

M

SD

M

SD

Sex (M/F)

10/19

11/18

-

Age (years)

24.52

4.04

24.24

3.37

ns

ME

15.62

2.64

28.35

2.07

**

AM

21.88

3.60

22.48

3.02

ns

ESS

5.34

2.33

7.70

3.40

*

PSQI

3.14

0.99

3.31

1.20

ns

EHI

86.13

13.87

90.73

14.03

ns

Declared waketime (hh:mm)

6:58 AM

64 min

7:37 AM

51 min

*

Declared bedtime (hh:mm)

11:21 PM

54 min

00:06 AM

48 min

*

Declared length of perfect sleep (hh:mm)

08:50

61 min

08:25

41 min

ns

Actigraphy-derived waketime (hh:mm)

7:36 AM

74 min

8:35 AM

72 min

*

Actigraphy-derived bedtime (hh:mm)

11:55 PM

60 min

1:01 AM

56 min

*

Actigraphy-derived length of real sleep (hh:mm)

06:33

44 min

06:28

31 min

ns

PER3 polymorphism

5/5

4/4

-

  1. Mann–Whitney U test, *p < 0.05, **p < 0.001, ns not significant.
  2. MT morning types, ET evening types, ME morningness/eveningness scale from Chronotype Questionnaire, AM amplitude scale from Chronotype Questionnaire, ESS Epworth Sleepiness Scale, PSQI Pittsburgh Sleep Quality Index, EHI Edinburgh Handedness Inventory, M mean, SD standard deviation.
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