Table 1 Mean proportions (standard errors) of the covariates used in the analysis

Girl

48.2% (0.5)

48.9% (0.5)

48.6% (0.5)

48.0% (0.5)

48.4% (0.5)

49.7% (0.5)

47.2% (0.5)

Age 6–8

32.7% (0.5)

29.9% (0.5)

28.2% (0.5)

31.1% (0.5)

27.0% (0.4)

29.5% (0.4)

31.5% (0.5)

Age 9–11

33.3% (0.5)

34.3% (0.5)

34.4% (0.5)

32.3% (0.5)

32.0% (0.5)

32.4% (0.5)

32.7% (0.5)

Age 12–14

34.0% (0.5)

35.8% (0.5)

37.4% (0.5)

36.6% (.48)

41.0% (.49)

38.2% (0.5)

35.9% (0.5)

Social class

Upper non-manual

3.6% (0.2)

13.5% (0.4)

16.6% (0.4)

8.6% (0.3)

9.3% (0.3)

10.8% (0.3)

12.0% (0.3)

Lower non-manual

31.5% (0.5)

34.5% (0.5)

31.3% (0.5)

36.7% (0.5)

35.1% (0.5)

36.0% (0.5)

27.8% (0.5)

Skilled manual

38.6% (0.5)

33.5% (0.5)

35.4% (0.5)

45.4% (0.5)

44.7% (0.5)

41.3% (0.5)

46.5% (0.5)

Unskilled manual

26.3% (0.4)

18.5% (0.4)

16.6% (0.4)

9.3% (0.3)

10.9% (0.3)

11.9% (0.3)

13.6% (0.3)

Dental care programme

PADI

-

3.9% (0.2)

2.6% (0.2)

10.7% (0.1)

12.4% (0.3)

26.4% (0.4)

38.4% (0.5)

Rate of dentists

per 100,000 inhabitants

17.6

32.34

37.13

44.19

44.58

49.52

60.23

(standard deviations)

(4.1)

(7.7)

(8.9)

(11.1)

(10.7)

(10.6)

(14.9)

N° observations

6046

3162

2453

2861

3718

4845

3079

(missing values)

(230)

(108)

(175)

(364)

(132)

(285)

(181)