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Table 4 Screen time after first shuteye time 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

2·6 (8.0)

27 (32·5)

54 (15.7)

8·4 (0·5, 28·6)

3·2 (7·4)

Type of device

Phone

2·0 (5·6)

22 (26·5)

46 (13·4)

7·3 (0·5, 29·2)

2·8 (7·9)

Laptop

0·1 (0·3)

3 (3·6)

3 (0·9)

7·8 (1·1, 9·0)

0·1 (0·6)

Tablet

0·0 (0·0)

1 (1·2)

1 (0·3)

1·7 (1·7, 1·7)

0·0 (0·1)

TV

0·0 (0·0)

2 (2·4)

2 (0·6)

0·4 (0·3, 0·5)

0·0 (0·0)

Gaming console

0

0

0

0

0

Handheld gaming console

0·0 (0·4)

1 (1·2)

1 (0·3)

15·7 (15·7, 15·7)

0·1 (0·9)

Desktop computer

0

0

0

0

0

Multitasking across devices

0·4 (3·3)

3 (3·6)

5 (1·5)

20·2 (0·3, 39·5)

0·5 (3·5)

E-reader

0

0

0

0

0

Other

0·8 (4·7)

4 (4·8)

8 (2·3)

24·9 (21·7, 33·8)

0·8 (4·2)

Activity types

Passive1

1·8 (5·6)

25 (30·1)

47 (13·7)

5.8 (0.5, 26.5)

2·6 (6·6)

Interactive2

0·6 (2·7)

10 (12·1)

18 (5·2)

4·6 (2·0, 15·7)

0·8 (3·5)

Screen activities

Watching

0·1 (0·4)

5 (6·0)

5 (1·5)

1·7 (0·5, 9·5)

0·1 (0·8)

Listening

1·3 (5·3)

11 (13·3)

18 (5·2)

25·9 (12·9, 29·5)

1·8 (5·9)

Reading

0

0

0

0

0

Social media use

0·4 (2·5)

5 (6·0)

8 (2·3)

4·7 (1·2, 25·6)

0·7 (3·9)

Browsing

0

0

0

0

0

Gaming

0·2 (1·4)

3 (3·6)

4 (1·2)

15·7 (2·0, 25·1)

0·4 (2·4)

Communication

0·3 (5·4)

5 (6·0)

9 (2·6)

3·9 (3·5, 5·3)

0·4 (2·6)

Multitasking within a device

0

0

0

0

0

Educational/creative

0

0

0

0

0

Unknown passive

0·4 (2·0)

17 (20·5)

30 (8·7)

0·7 (0·5, 2·2)

0·7 (3·0)

Unknown interactive

0·1 (0·4)

4 (4·8)

6 (1·7)

2·2 (0·4, 4·5)

0·1 (0·6)

Blocked/not in view

0·8 (2·1)

27 (32·5)

43 (12·5)

2·1 (0·4, 13·9)

1·3 (3·2)

  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
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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