Table 2 Internet use patterns and their relation to internet addiction (*p < 0.05; **p < 0.001)

Start of internet use (years) (X² (13) = 34.874)

1–2

17 (1.5%)

12 (1.2%)

5 (3.9%)

3–4

66 (5.7%)

56 (5.4%)

10 (7.9%)

5–6

259 (22.1%)

219 (21%)

40 (31.5%) *

7–8

404 (34.6%)

362 (34.8%)

42 (33.1%)

9–10

355 (30.4%)

327 (31.4%)

28 (22%)

11–12

65 (5.5%)

63 (6%)

2 (1.6%)

13

2 (0.3%)

2 (0.2%)

0 (0%)

Time spent online (X² (7) = 67.799)

1 h

156 (13.3%)

152 (14.6%)

4 (3.2%) **

2 h

220 (18.8%)

211 (20.3%)

9 (7.1%) **

3 h

225 (19.3%)

207 (19.9%)

18 (14.2%)

4 h

191 (16.4%)

171 (16.4%)

20 (15.7%)

5 h

121 (10.4%)

105 (10.1%)

16 (12.1%)

6 h

85 (7.3%)

69 (6.6%)

16 (12.6%)

> 6 h

170 (14.5%)

126 (12.1%)

44 (34.6%)**

Preferred digital device (multiple answers) (X² (15) = 11.672)

mobile phone

1083 (92.7%)

966 (92.8%)

117 (92.1%)

tablet

199 (17%)

174 (16.7%)

25 (19.7%)

laptop

403 (34.5%)

357 (34.3%)

46 (36.2%)

computer

327 (28%)

295 (28.3%)

32 (25.2%)

Preferred time interval of being online (multiple answers) (X² (9) = 56.926)

morning

280 (24%)

227 (21,8%)

53 (41.7%)

afternoon

1078 (92.3%)

959 (92.1%)

119 (93.7%)

night

419 (35.9%)

347 (33.3%)

72 (56.7%)

Purpose of internet use (multiple answers) (X² (38) = 66.492)

gaming

885 (75.8%)

786 (75.5%)

99 (77.9%)

online chat

944 (81.8%)

844 (81.1%)

100 (78.7%)

video watching

890 (76.2%)

785 (75.4%)

105 (82.7%)

watching films

691 (59.2%)

606 (58.2%)

85 (66.9%)

learning

616 (52.7%)

564 (54.2%)

52 (40.9%)