Factor Total
N 		Self-reported arthritis
N (%) 		OR (95% CI)a OR (95% CI)a
excluding age > 65
Number of natural teeth
> 20 30844 1628 (5.3) 1 1
10 - 19 6023 812 (13.5) 1.29 (1.16; 1.44) 1.37 (1.19; 1.58)
< 10 2878 563 (19.6) 1.45 (1.27; 1.66) 1.53 (1.26; 1.86)
Edentulous 6160 1288 (20.9) 1.22 (1.08; 1.37) 1.49 (1.26; 1.76)
Bleeding gums
No 37687 2828 (7.5) 1 1
Yes 2073 177 (8.5) 1.63 (1.35; 1.96) 1.48 (1.19;1.84)
Toothache
No 34395 2583 (7.5) 1 1
Yes 5369 422 (7.9) 1.32 (1.16; 1.5) 1.34 (1.15; 1.56)
Biting difficulties
No 38319 2786 (7.3) 1 1
Yes 1445 219 (15.2) 1.95 (1.62; 2.34) 2.11 (1.69; 2.64)
Brushing teeth with fluoride toothpaste
No 1372 304 (22.2) 1 1
Yes 8519 663 (7.8) 1.25 (0.74; 2.12) 1.04 (0.51; 2.12)
Use dental floss
No 7641 800 (10.5) 1 1
Yes 2250 167 (7.4) 1.11 (0.89; 1.39) 1.03 (0.78; 1.37)

aOdds ratio (95% Confidence Interval) adjusted for age, gender, qualification, smoking and BMI.
N = number of cases.