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
Overall health
Excellent 81,835 0.74 1d 0.26 1d
Good 288,592 1.5 2.06 (1.89, 2.24) 0.61 2.41 (2.09, 2.78)
Fair 105,067 2.89 4.15 (3.8, 4.52) 1.5 6.24 (5.4, 7.2)
Poor 22,714 5.68 8.20 (7.44, 9.03) 3.64 15.29 (13.14, 17.79)
No information 2,280
Sleep problems
Never/rarely 120,584 1.16 1d 0.5 1d
Sometimes 238,351 1.73 1.42 (1.33, 1.51) 0.75 1.44 (1.31, 1.58)
Usually 141,134 2.71 2.19 (2.05, 2.33) 1.41 2.59 (2.37, 2.85)
No information 419
Snoring
No 291,626 1.8 1 0.86 1
Yes 173,100 1.91 1.23 (1.17, 1.28) 0.88 1.20 (1.13, 1.28)
No information 35,762
Smoking
No 447,389 1.81 1 0.85 1
Only occasionally 13,700 1.9 1.11 (0.98, 1.25) 0.8 1 (0.83, 1.22)
Yes, on most or all days 39,102 2.52 1.42 (1.33, 1.51) 1.22 1.47 (1.34, 1.62)
No information 297
Alcohol intake frequency
Never 40,409 2.74 1 1.53 1
Special occasions only 57,805 2.63 0.92 (0.85, 0.99) 1.34 0.84 (0.75, 0.93)
One to three times a month 55,767 2.33 0.83 (0.76, 0.9) 1.11 0.71 (0.63, 0.79)
Once or twice a week 129,069 1.73 0.65 (0.61, 0.7) 0.8 0.55 (0.49, 0.6)
Three or four times a week 115,325 1.49 0.58 (0.54, 0.63) 0.63 0.45 (0.4, 0.5)
Daily or almost daily 101,691 1.42 0.59 (0.54, 0.63) 0.62 0.47 (0.42, 0.52)
No information 422

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.
dTest for trend P < 0.001.
RR = relative risks.