Table 1 Demographic characteristics (sex, age, and social class) and TV exposure by country: The Pro Children study

Participation rate (%)

95.3

84.5

92.0

88.7

79.7

89.5

98.4

94.7

84.2

Sex: % girls

53.0

46.1

49.1

47.8

53.8

49.6

53.1

46.4

50.0

Age in years: mean; 98%CI

11.0

10.97–11.03

11.5

11.43–11.49

11.4

11.36–11.41

11.3

11.24–11.30

11.7

11.67–11.75

11.3

11.27–11.34

11.5

11.47–11.51

11.4

11.39–11.45

11.4

11.35–11.41

Social class: %

social class I-II

22.7

28.4

26.6

26.5

23.5

26.4

17.9

25.8

24.9

Regular TV viewing (hours per day):

mean; 98%CI

2.2

2.1–2.3

2.7

2.6–2.8

2.2

2.1–2.3

2.0

1.9–2.1

2.7

2.6–2.8

2.2

2.0–2.3

2.7

2.6–2.7

2.2

2.1–2.3

2.1

2.0–2.2

TV during dinner (days per week):

mean; 98%CI

2.8

2.7–3.0

2.9

2.7–3.0

2.3

2.2–2.5

4.7

4.5–4.9

2.5

2.3–2.7

1.9

1.7–2.1

5.5

5.4–5.7

4.8

4.6–5.0

2.8

2.6–2.9