Table 1 Participants demographic characteristics

Age categories (years) (n = 5715)

18–29 years

5290

92.5%

2785

99.2%

1303

86.3%

663

86.6%

383

88.7%

156

78.0%

30–49 years

342

6.0%

16

0.6%

168

11.1%

98

12.8%

39

9.0%

21

10.5%

50 years and above

83

1.5%

7

0.2%

38

2.5%

5

0.7%

10

2.3%

23

11.5%

Gender (n = 5712)

Females

3773

66.1%

1841

65.6%

971

64.3%

494

64.5%

317

73.4%

150

75.0%

Marital status (n = 5716)

Single

5139

89.9%

2683

95.5%

1213

80.4%

654

85.4%

409

94.7%

180

90.0%

Married

503

8.8%

120

4.3%

247

16.4%

97

12.7%

22

5.1%

17

8.5%

Divorced

58

1.0%

4

0.1%

37

2.5%

13

1.7%

1

0.2%

3

1.5%

Widowed

16

0.3%

2

0.1%

12

0.8%

2

0.3%

0

0.0%

0

0.0%

Field of study (n = 5707)

Medical college

3191

55.9%

1248

44.6%

797

52.8%

616

80.4%

350

81.0%

180

90.0%

Year level (n = 5701)

First year

716

12.6%

224

8.0%

182

12.1%

142

18.5%

89

20.6%

79

39.5%

Second year

772

13.5%

359

12.8%

162

10.7%

152

19.8%

76

17.6%

23

11.5%

Third year

892

15.6%

429

15.4%

240

15.9%

124

16.2%

78

18.1%

21

10.5%

Fourth year

1026

18.0%

577

20.7%

248

16.4%

123

16.1%

68

15.7%

10

5.0%

Fifth year

1443

25.3%

885

31.7%

299

19.8%

163

21.3%

81

18.8%

15

7.5%

Sixth year

281

4.9%

44

1.6%

197

13.1%

7

0.9%

5

1.2%

28

14.0%

Higher education

571

10.0%

276

9.9%

181

12.0%

55

7.2%

35

8.1%

24

12.0%

Income level (n = 5504)

Less than 700$

4415

80.2%

2494

96.0%

990

65.6%

510

66.6%

334

77.3%

87

43.5%

700–1500$

542

9.8%

68

2.6%

177

11.7%

183

23.9%

56

13.0%

58

29.0%

1500–2100$

227

4.1%

12

0.5%

125

8.3%

45

5.9%

23

5.3%

22

11.0%

2100$ and above

320

5.8%

23

0.9%

217

14.4%

28

3.7%

19

4.4%

33

16.5%

In general, do you suffer from an anxiety problem or use a treatment for anxiety (n = 5646)?

Yes

1688

29.9%

670

23.9%

524

35.6%

248

33.3%

170

39.4%

76

38.0%

Mean daily time spent on using mobile phone (SD) (minutes):

186.4 (94.4)

159.7 (102.0)

217.9 (77.6)

198.3 (81.0)

208.9 (74.6)

225.7 (77.3)

Duration of mobile phone usage (years) (n = 5705):

Less than one year

95

1.7%

57

2.0%

16

1.1%

16

2.1%

2

0.5%

4

2.0%

1–5 years

1200

21.0%

714

25.5%

185

12.3%

205

26.8%

71

16.4%

25

12.5%

6–10 years

2460

43.1%

1144

40.9%

694

46.0%

287

37.5%

250

57.9%

85

42.5%

10 years and above

1950

34.2%

883

31.6%

614

40.7%

258

33.7%

109

25.2%

86

43.0%