Table 1 Child and parent demographics and average screen time behaviors (mean minutes/day [±SD]) by screen time behavior typology membership

 Parent sex (% women)

93.5

93.3

92.9

94.8

0.915

 Parent age

40.9 (6.16)

40.3 (5.78)^a

41.9 (6.64)^ab

39.5 (6.32)^b

0.0017

 Child sex (% girls)

46.2

49.0^a

49.7^b

36.3^ab

0.046

 Child age

11.2 (2.62)

10.4 (2.43)^ab

12.2 (2.64)^ab

10.7 (2.36)^b

< 0.001

 TV viewing

67.22 (59.03)

43.68 (41.86)^ac

71.88 (60.87)^ab

91.9 (64.39)^bc

p < 0.001

 Tablet/smartphone (leisure)

55.32 (72.06)

26.96 (41.98)^ab

69.08 (72.32)^a

72.48 (89.61)^b

p < 0.001

 Computer (leisure)

45.36 (72.58)

7.17 (13.65)^a

96.51 (86.25)^ab

14.03 (38.16)^b

p < 0.001

 Computer (homework)

25.84 (59.17)

9.54 (19.75)^a

54.14 (84.35)^ab

6.27 (22.75)^b

p < 0.001

 Electronic gaming

22.67 (53.71)

7.06 (21.43)^ac

24.3 (52.83)^ab

41.74 (75.56)^bc

p < 0.001

 Tablet/smartphone (homework)

6.3 (19.54)

1.54 (7.62)^a

11.27 (28.11)^a

5.86 (13.77)

p < 0.001

 TV viewing

61.38 (62.90)

32.09 (34.56)^ac

68.15 (71.36)^ab

88.04 (63.25)^bc

p < 0.001

 Tablet/smartphone (leisure)

79.8 (102.05)

26.2 (25.95)^ac

86.11 (107.05)^ab

134.46 (119.01)^bc

p < 0.001

 Computer (leisure)

34.71 (62.31)

16.26 (41.49)^a

61.73 (76.46)^ab

18.95 (45.67)^b

p < 0.001

 Computer (homework)

45.52 (89.45)

29.03 (59.02)^a

72.26 (119.16)^ab

27.78 (56.4)^b

p < 0.001

 Electronic gaming

1.53 (12.46)

0.29 (3.16)^a

3.79 (20.04)^ab

0.07 (0.76)^b

p = 0.01

 Tablet/smartphone (homework)

11.06 (28.99)

6.4 (18.25)^a

18.16 (38.28)^ab

7.04 (22.53)^b

p < 0.001