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Table 5 Screen use patterns in Chinese children in Changsha at each time point

From: Prevalence, correlates, and trajectory of screen viewing among Chinese children in Changsha: a birth cohort study

Variable

Time point

18 months

24 months

36 months

42 months

48 months

54 months

60 months

P valuea

Included population number

866

824

717

634

606

553

497

 

Media device

 Phone

414 (47.8%)

471 (57.2%)

368 (51.3%)

289 (45.6%)

284 (46.9%)

255 (46.1%)

242 (48.7%)

< 0.001

 TV

585 (67.6%)

675 (81.9%)

646 (90.1%)

572 (90.2%)

524 (86.5%)

454 (82.1%)

350 (70.4%)

< 0.001

 iPad

49 (5.7%)

101 (12.3%)

99 (13.8%)

107 (16.9%)

137 (22.6%)

165 (29.85)

219 (44.1%)

> 0.05

 Video game

0

2 (0.2%)

5 (0.7%)

1 (0.2%)

3 (0.5%)

2 (0.4%)

5 (1.0%)

> 0.05

 Computer

13 (1.5%)

15 (1.8%)

17 (2.4%)

14 (2.2%)

19 (3.1%)

9 (1.65%)

22 (4.4%)

> 0.05

 other

8 (0.9%)

18 (2.2%)

4 (0.6%)

10 (1.6%)

9 (1.5%)

24 (4.3%)

29 (5.8%)

> 0.05

Usage Scenarios

 Education

114 (13.2%)

151 (18.35%)

132 (18.4%)

135 (21.3%)

112 (18.5%)

112 (20.3%)

160 (32.2%)

0.105

 Soothing when crying

73 (8.4%)

89 (10.85%)

37 (5.2%)

22 (3.55%)

8 (1.3%)

20 (3.6%)

19 (3.8%)

> 0.05

 Substitute caretaker

99 (11.4%)

257 (31.2%)

143 (19.9%)

91 (14.4%)

75 (12.4%)

69 (12.5%)

36 (7.2%)

> 0.05

 Children watching while adults use it

349 (40.3%)

229 (27.8%)

109 (15.2%)

50 (7.9%)

58 (9.6%)

62 (11.2%)

82 (16.5%)

> 0.05

 other

128 (14.8%)

248 (30.15%)

33 (4.6%)

32 (5.0%)

57 (9.4%)

72 (13.0%)

72 (14.5%)

> 0.05

 Limitation on screen time

  

626 (87.3%)

554 (87.4%)

558 (92.1%)

516 (93.3%)

475 (95.6%)

< 0.001

  1. Since children could have more than one media device to use every day, the number of cases does not always sum to the included population number
  2. Since children could have more than one usage scenario every day, the number of cases does not always sum to the included population number
  3. aP value was calculated by one-way repeated measures ANOVA