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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: J Pain. 2011 Oct 26;13(1):21–31. doi: 10.1016/j.jpain.2011.08.003

Table 2.

Relationship of cigarette smoking exposure to TMD (odds ratio [OR], 95% confidence interval [95% CI]), stratified by age.

<30 years
 ≥30 years
OR 95% CI OR 95% CI
Ever smoker 4.14 1.57, 11.35 1.23 0.55, 2.78
Lifetime non-smoker Ref Ref

Breslow-Day test of homogeneity, P= 0.038

95% confidence interval is from the exact method for contingency tables