Table 1 Associations of high daily smartphone usage time (> 2 h/d) and intensive use of different smartphone activities with SAPS scores (PSU symptoms) (N = 564)

374

2.81

1.61 – 4.00

0.20

4.61

 < .001

0.08

 < .001

intensive use of smartphone activities (frequent usage + high daily smartphone usage time)

  social networking

277

3.65

2.50 – 4.80

0.27

6.24

 < .001

0.11

 < .001

  writing text messages

140

1.24

-0.03 – 2.50

0.08

1.91

0.05

0.05

 < .001

  watching video clips

190

2.06

0.92 – 3.20

0.15

3.56

 < .001

0.07

 < .001

  gaming

144

2.39

1.15 – 3.63

0.16

3.79

 < .001

0.07

 < .001

  searching for information

94

1.25

-0.22 – 2.72

0.07

1.67

0.10

0.05

 < .001