Table 3 Dental characteristics of study individuals in the RA and control groups

Definition

Pvalue

Periodontitis

yes/no (% yes)

0.001

Mean

SD

Mean

SD

Pvalue

Number of remaining teeth

22.

4.6

24.5

4.3

0.001

Number of teeth with endodontic treatment

3.2

3.2

3.1

2.5

0.72

Number of peri-apical lesions

0.3

0.7

0.3

0.6

0.97

Root remnants

0.2

1.0

0.5

6.2

0.59

BOP % (present at ≥20% of sites assessed)

24.5

22.6

21.8

16.8

0.24

Plaque score % (present at ≥20% of sites assessed)

31.5

23.9

32.4

21.9

0.54

Number of sites with a PPD ≥ 5 mm

3.3

6.2

2.7

5.4

0.36

Bone level ≥ 5 mm at ≥30% sites examined radiographically (% sites)

18.7

23.5

13.5

7.6

0.03