Table 5 Associations of SAPS scores (PSU symptoms) and high smartphone usage time (> 2 h/d) with school performance (N = 564)

Simple regression

  SAPS score (PSU symptoms)

OR

1.03

1.04

1.03

1.04

CI 95%

1.004—1.07

1.01–1.07

1.001 – 1.06

1.01–1.07

p

0.03

0.004

0.04

0.004

  high smartphone usage time (> 2 h/d)

OR

1.66

1.31

1.22

1.40

CI 95%

1.01 – 2.72

0.86 – 2.00

0.83 – 1.80

0.93 – 2.10

p

0.04

0.20

0.30

0.10

Multiple regression

  SAPS score (PSU symptoms)

OR

1.03

1.04

1.03

1.04

CI 95%

0.99 – 1.06

1.01 – 1.07

0.99 – 1.05

1.01 – 1.07

p

0.06

0.007

0.06

0.01

  high smartphone usage time (> 2 h/d)

OR

1.52

1.17

1.14

1.26

CI 95%

0.92 – 2.52

0.76 – 1.81

0.77– 1.69

0.83 – 1.92

p

0.10

0.46

0.51

0.27