Factor N Facial pain
(n = 9,345)a 		Chronic facial pain
(n = 4,409)b
Prevalence (%) RR (95% CI)c Prevalence (%) RR (95% CI)c
Mouth ulcers
No 445,154 1.68 1 0.78 1
Yes 50,183 3.51 2.01 (1.9, 2.11) 1.76 2.15 (2, 2.32)
No information 5,151
Painful gums
No 480,133 1.68 1 0.79 1
Yes 15,204 7.62 4.27 (4.01, 4.54) 3.89 4.62 (4.24, 5.04)
No information 5,151
Bleeding gums
No 429,060 1.73 1 0.82 1
Yes 66,277 2.74 1.45 (1.37, 1.52) 1.27 1.4 (1.30, 1.51)
No information 5,151
Loose teeth
No 473,694 1.82 1 0.86 1
Yes 21,643 2.86 1.63 (1.5, 1.77) 1.28 1.54 (1.37, 1.74)
No information 5,151
Toothache
No 473,171 1.63 1 0.77 1
Yes 22,166 6.88 4.24 (4.01, 4.48) 3.22 4.22 (3.89, 4.58)
No information 5,151
Dentures
No 412,333 1.87 1 0.88 1
Yes 83,004 1.86 1.15 (1.08, 1.21) 0.9 1.17 (1.08, 1.27)
No information 5,151

aFacial pain that interfered with participants’ usual activities.
bChronic facial pain was defined as facial pains for more than 3 months. 132 participants did not answer the question about chronicity and were excluded.
cAdjusted for age group and gender.
RR = relative risks.