Your privacy, your choice

We use essential cookies to make sure the site can function. We also use optional cookies for advertising, personalisation of content, usage analysis, and social media.

By accepting optional cookies, you consent to the processing of your personal data - including transfers to third parties. Some third parties are outside of the European Economic Area, with varying standards of data protection.

See our privacy policy for more information on the use of your personal data.

for further information and to change your choices.
Skip to main content

Table 2 Screen time in the two hours before bed across device and activity types for 83 participants over a possible 344 nights

From: From dusk to dawn: examining how adolescents engage with digital media using objective measures of screen time in a repeated measures study

 

Overall mean duration min (SD)

Number (%) of participants who had screen time

Total number (%) of nights with screen time

Median (25th, 75th percentile) duration when used, min

Mean (SD) within-person SD of screen time min

Total screen time

54·4 (25·5)

82 (98·8)

308 (89·5)

56·4 (33·4, 73·2)

27·5 (11·4)

Type of device

Phone

16·3 (17·4)

72 (86·8)

220 (64·0)

19·0 (7·2, 31·8)

14·5 (13·1)

Laptop

9·0 (16·2)

43 (51·8)

88 (25·6)

23·9 (6·2, 51·1)

9·6 (14·6)

Tablet

3·5 (10·9)

18 (21·7)

31 (9·0)

23·4 (4·8, 54·9)

3·9 (10·3)

TV

23·5 (24·5)

70 (84·4)

192 (55·8)

37·2 (12·8, 63·1)

19·7 (16·6)

Gaming console

7·4 (17·6)

28 (33·7)

59 (17·0)

30·2 (16·5, 57·6)

6·3 (11·3)

Handheld gaming console

0·4 (2·6)

3 (3·6)

5 (1·5)

22·2 (2·2, 42·7)

0·6 (4·3)

Desktop computer

3·1 (11·4)

14 (16·9)

29 (8·4)

22·1 (9·1, 62·2)

3·0 (9·2)

Multitasking across devices

11·9 (15·0)

63 (75·9)

166 (48·3)

18·8 (8·9, 37·9)

12·9 (13·9)

E-reader

0·0 (0·0)

0 (0·0)

0·0 (0)

0·0

0·0

Other

0·1 (0·5)

2 (2·4)

4 (1·2)

3·8 (1·0, 6·6)

0·1 (0·8)

Activity types

Passive1

36·5 (24·2)

82 (98·8)

301 (87·5)

38·1 (21·4, 59·3)

25·7 (14·2)

Interactive2

20·9 (22·5)

77 (92·8)

231 (67·2)

23·8 (9·2, 37·0)

17·1 (12·7)

Screen activities

Watching

31·3 (24·4)

76 (91·6)

246 (71·5)

38·1 (22·1, 59·2)

23·2 (15·1)

Listening

1·7 (4·6)

24 (28·9)

33 (9·6)

7·4 (1·1, 21·2)

2·7 (7·0)

Reading

0·0 (0·3)

1 (1·2)

1 (0·3)

15·3 (15·3, 15·3)

0·1 (0·7)

Social media use

4·7 (7·9)

51 (61·5)

114 (33·1)

7·8 (2·1, 19·4)

5·5 (7·9)

Browsing

1·6 (2·2)

68 (81·9)

151 (43·9)

3·7 (0·1, 5·1)

2·3 (3·3)

Gaming

10·9 (15·6)

59 (71·1)

120 (34·9)

22·9 (10·6, 41·0)

12·1 (13·2)

Communication

3·3 (5·4)

65 (78·3)

150 (43·6)

3·7 (1·3, 7·6)

3·7 (5·8)

Multitasking within a device

5·3 (13·9)

39 (47·0)

73 (21·2)

7·7 (0·6, 24·5)

5·2 (11·5)

Educational/creative

1·3 (3·5)

31 (37·4)

46 (13·4)

4·3 (1·6, 10·5)

2·1 (5·7)

Unknown passive

1·9 (3·3)

78 (94·0)

229 (66·6)

1·3 (0·5, 3·2)

2·6 (4·6)

Unknown interactive

0·9 (0·4)

8 (9·6)

9 (2·6)

1·2 (0·8, 4·2)

0·2 (0·9)

Blocked/not in view2

10·1 (8·9)

80 (96·4)

263 (76·5)

10·6 (4·3, 20·0)

10·4 (10·1)

  1. 1 Passive activities included the total amount of time either watching, listening, reading, browsing or an unknown passive activity on a screen
  2. 2 Interactive activties included the total amount of either gaming, communication, multitasking, educational/creative or an unknown interactive activity on a screen
  3. 3 Blocked view/not in view: instances where the screen was obscured or the participant was outside the camera’s field of view
Back to article page

International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

Contact us