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Table 4 Prevalence and extent of radiographic bone loss and periodontal pocked depth by age group, ethnicity and in total

From: Correction to: Periodontal health in an indigenous Sámi population in Northern Norway: a cross-sectional study

Periodontal measurements

Age Groups (years)

Total

18–34

35–49

50–64

65–75

18–75

Ethnicity

Sámi

Non-Sámi

Sámi

Non-Sámi

Sámi

Non-Sámi

Sámi

Non-Sámi

Sámi

Non-Sámi

Number of individuals

313

106

435

252

468

241

165

98

1381

697

RBL, proportionsa

 RBL 15–33%

3.8

5.7

32.6

25.0

59.4

53.5

53.9

57.1

37.7

36.4

 RBL > 33%

0.3

0.0

3.5

5.6

23.3

21.2

25.5

25.5

12.1

12.9

PD, proportionsa

 One or more PD ≥ 4 mm

40.6

40.6

63.7

56.4

71.6

63.1

73.3

81.6

62.3

59.8

 One or more PD ≥ 6 mm

5.1

5.7

16.1

10.3

29.1

19.9

27.3

27.5

19.4

15.6

PD, mean (SE)b

 Proportions of sites/mouth

  PD ≥ 4 mm

3.5 (0.4)

3.8 (0.7)

7.7 (0.5)

6.8 (0.7)

10.5 (0.7)

10.1 (1.0)

8.8 (0.9)

11.7 (1.4)

8.0 (0.3)

8.2 (0.5)

  PD ≥ 6 mm

0.2 ( 0.0)

0.1 (0.1)

0.5 (0.1)

0.4 (0.1)

1.3 (0.2)

1.1 (0.2)

1.2 (0.2)

1.2 (0.3)

0.8 (0.1)

0.7 (0.1)

  1. RBL = radiographic bone loss; PD = periodontal pocket depth. SE = standard error. Bold-face = statistically significant differences between Sámi and non-Sámi in each age group (p < 0.05). Statistical analyses were done with a = χ2-test and b = independent t-test