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Table 4 Comparison of smartphone use frequency between normal internet users and problematic internet users

From: Problematic internet use and psychiatric co-morbidity in a population of Japanese adult psychiatric patients

Age

Smartphone use frequency

Normal internet users, n (%) (N = 173)

Problematic internet users, n (%) (N = 58)

p (Fisher’s exact test)

Total (N = 231)

I don’t use it at all

48 (27.7)

13 (22.4)

<0.001**

I hardly use it

8 (4.6)

1 (1.7)

 

I sometimes use it

21 (12.1)

0

 

I often use it

40 (23.1)

2 (3.4)

 

I use it really often

56 (32.4)

42 (72.4)

 

20–29 (N = 49)

I don’t use it at all

2 (7.7)

2 (8.7)

0.016*

I hardly use it

1 (3.8)

0

 

I sometimes use it

2 (7.7)

0

 

I often use it

8 (30.8)

1 (4.3)

 

I use it really often

13 (50.0)

20 (87.0)

 

30–39 (N = 51)

I don’t use it at all

5 (13.5)

3 (21.4)

0.12

I hardly use it

3 (8.1)

0

 

I sometimes use it

2 (5.4)

0

 

I often use it

9 (24.3)

0

 

I use it really often

18 (48.6)

11 (78.6)

 

40–49 (N = 72)

I don’t use it at all

20 (33.3)

4 (33.3)

0.14

I hardly use it

3 (5.0)

0

 

I sometimes use it

11 (18.3)

0

 

I often use it

12 (20.0)

1 (8.3)

 

I use it really often

14 (23.3)

7 (58.3)

 

50–59 (N = 35)

I don’t use it at all

7 (24.1)

2 (33.3)

0.29

I hardly use it

1 (3.4)

1 (16.7)

 

I sometimes use it

3 (10.3)

0

 

I often use it

9 (31.0)

0

 

I use it really often

9 (31.0)

3 (50.0)

 

60–69 (N = 19)

I don’t use it at all

9 (56.3)

2 (66.7)

1.00

I hardly use it

0

0

 

I sometimes use it

3 (18.8)

0

 

I often use it

2 (12.5)

0

 

I use it really often

2 (12.5)

1 (33.3)

 

70 < (N = 5)

I don’t use it at all

5 (100.0)

0

1.00

I hardly use it

0

0

 

I sometimes use it

0

0

 

I often use it

0

0

 

I use it really often

0

0

 
  1. *: p < 0.05, **: p < 0.001