Table 3 Slope Index of Inequality (SII) and Relative Index of Inequality (RII) for never having access to a dentist appointment

 Up to 9 years old

54.20 (51.93–56.56)

50.78 (48.46–53.10)

39.94 (37.58–42.31)

35.06 (31.88–38.22)

< 0.001

 10–19 years old

31.60 (30.92–32.28)

17.67 (17.02–18.31)

18.20 (17.72–18.67)

19.17^a (18.58–19.75)

< 0.001

 20–49 years old

9.41 (9.16–9.67)

9.06^a (8.86–9.26)

5.93 (5.77–6.09)

7.17^a (6.12–7.44)

< 0.001

 60 years and older

15.80 (14.83–16.78)

14.83 (13.82–15.85)

10.18 (9.42–10.93)

12.35 (11.23–13.46)

< 0.001

 Up to 9 years old

2.66 (2.53–2.79)

2.80 (2.65–2.97)

2.42 (2.28–2.57)

2.31 (2.11–2.52)

< 0.001

 10–19 years old

27.06 (24.06–30.44)

41.77 (35.50–49.16)

40.10 (31.61–49.30)

26.19 (20.08–34.16)

< 0.001

 20–49 years old

24.07 (21.33–27.16)

30.81 (26.97–35.20)

27.17 (23.27–31.74)

18.40 (15.49–21.85)

< 0.001

 60 years and older

11.59 (9.49–14.16)

8.60 (7.16–10.34)

9.35 (7.61–11.49)

8.48 (6.71–10.70)

< 0.001