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Table 2 Description of symptoms measured with the PSU and PSQ

From: Symptom network between problematic smartphone use and poor sleep quality in adolescents with depression

Abbreviations

Item

M

SD

Skewness

Kurtosis

Predictability

P1

Subjective sleep quality

1.68

0.82

-0.17

-0.49

0.749

P2

Sleep latency

1.86

1.04

-0.44

-1.00

0.779

P3

Sleep duration

1.35

1.22

0.15

-1.56

0.790

P4

Habitual sleep efficiency

0.82

1.11

1.01

-0.49

0.828

P5

Sleep disturbances

1.57

0.62

0.55

-0.51

0.863

P6

Use of sleeping medication

1.08

1.32

0.57

-1.50

0.954

P7

Daytime dysfunction

2.46

0.82

-1.39

0.98

0.853

M1

Losing control and receiving complaints

2.82

0.92

0.16

-0.54

0.726

M2

Anxiety and craving

2.40

1.05

0.51

-0.63

0.715

M3

Withdrawal/Escape

2.89

1.08

0.37

-0.74

0.916

M4

Productivity loss

2.44

1.06

0.55

-0.40

0.763

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BMC Psychiatry

ISSN: 1471-244X

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