Table 1: Cohort characteristics (N = 182).

 

n (%)

Sex

 

Boys

105 (58.24)

Girls

76 (41.76)

Age (years)

 

12

1 (0.55)

13

23 (12.64)

14

49 (26.92)

15

39 (21.43)

16

53 (29.12)

17

17 (9.34)

Internet addiction (scores)

 

No addiction (1-20)

88 (48.35)

Mild addiction (21-49)

8 (4.40)

Moderate addiction (50-79)

29 (15.93)

Severe addiction (80+)

57 (31.32)

Cognitive fatigue

 

No problem

19 (10.44)

Almost never a problem

42 (23.08)

Sometimes a problem

60 (32.97)

Often a problem

39 (21.43)

Almost always a problem

22 (12.09)

Sleeping fatigue

 

No problem

36 (19.78)

Almost never a problem

68 (37.36)

Sometimes a problem

59 (32.42)

Often a problem

13 (7.14)

Almost always a problem

6 (3.30)

General fatigue

 

No problem

37 (20.33)

Almost never a problem

73 (40.11)

Sometimes a problem

56 (30.77)

Often a problem

11 (6.04)

Almost always a problem

5 (2.75)

Depression

 

No/minimal depression

86 (47.25)

Mild depression

20 (10.99)

Moderate depression

15 (8.24)

Severe depression

61 (33.52)