Table 4 Absolute and relative socioeconomic inequality in plaque-free, periodontal health, and deep pockets in adults aged 25–54 from the Dutch National Oral Health Survey 1995–2013

Plaque-free

 Regression-based absolute effect index ^a

2.6 (− 1.7 to 6.9)

1.9 (− 2.1 to 6.0)

8.4 (2.1 to 14.7)

8.6 (1.5 to 15.7)

 Regression-based relative effect index ^b

1.308 (0.819 to 2.090)

1.292 (0.674 to 2.477)

1.698 (1.124 to 2.565)

1.561 (1.080 to 2.257)

Periodontal health

 Regression-based absolute effect index ^a

3.7 (− 3.5 to 10.8)

10.0 (1.6 to 18.4)

4.0 (− 3.8 to 11.8)

9.6 (1.8 to 17.4)

 Regression-based relative effect index ^b

1.163 (0.873 to 1.549)

1.516 (1.080 to 2.126)

1.188 (0.852 to 1.656)

1.516 (1.092 to 2.106)

Deep pockets

 Regression-based absolute effect index ^a

 − 4.2 (− 7.1 to − 1.3)

 − 2.3 (− 5.9 to 1.3)

 − 3.1 (− 5.4 to 0.7)

 − 2.6 (− 5.6 to 0.3)

 Regression-based relative effect index ^b

0.433 (0.216 to 0.869)

0.730 (0.382 to 1.396)

0.618 (0.325 to 1.176)

0.585 (0.290 to 1.177)