Table 4 Comparison of subjective sleep quality between the chronotypes

Subjective sleep quality

Absence

57

(77.0)

309

(63.7)

1.96

*

1.10

-

3.48

47

(44.3)

4.40

*

2.25

-

8.58

Presence

17

(23.0)

176

(36.3)

59

(55.7)

Component scores^a

Sleep quality

0 points

11

(14.9)

47

(9.7)

1.87

*

1.14

-

3.07

5

(4.7)

3.32

*

1.83

-

6.03

1 point

48

(64.9)

277

(57.1)

53

(50.0)

2 points

14

(18.9)

151

(31.1)

43

(40.6)

3 points

1

(1.4)

10

(2.1)

5

(4.7)

Sleep latency

0 points

37

(50.0)

163

(33.6)

1.87

*

1.18

-

2.97

25

(23.6)

3.80

*

2.17

-

6.65

1 point

24

(32.4)

197

(40.6)

35

(33.0)

2 points

11

(14.9)

97

(20.0)

31

(29.2)

3 points

2

(2.7)

28

(5.8)

15

(14.2)

Sleep duration

0 points

21

(28.4)

143

(29.5)

1.00

0.64

-

1.57

26

(24.5)

1.40

0.81

-

2.42

1 point

30

(40.5)

188

(38.8)

38

(35.8)

2 points

21

(28.4)

143

(29.5)

38

(35.8)

3 points

2

(2.7)

11

(2.3)

4

(3.8)

Sleep efficiency

0 points

62

(83.8)

370

(76.3)

1.60

0.84

-

3.07

71

(67.0)

2.60

*

1.25

-

5.41

1 point

9

(12.2)

88

(18.1)

25

(23.6)

2 points

3

(4.1)

21

(4.3)

6

(5.7)

3 points

0

(0.0)

6

(1.2)

4

(3.8)

Sleep disturbance

0 points

34

(45.9)

172

(35.5)

1.58

0.96

-

2.59

39

(36.8)

1.54

0.84

-

2.81

1 point

39

(52.7)

305

(62.9)

65

(61.3)

2 points

1

(1.4)

8

(1.6)

2

(1.9)

Using sleep medication

0 points

72

(97.3)

476

(98.1)

0.65

0.14

-

3.13

106

(100.0)

0.00

0.00

1 point

1

(1.4)

5

(1.0)

0

(0.0)

2 points

1

(1.4)

4

(0.8)

0

(0.0)

Daytime dysfunction

0 points

43

(58.1)

239

(49.3)

1.41

0.87

-

2.29

40

(37.7)

2.23

*

1.25

-

3.99

1 point

25

(33.8)

202

(41.6)

53

(50.0)

2 points

5

(6.8)

39

(8.0)

10

(9.4)

3 points

1

(1.4)

5

(1.0)

3

(2.8)