Appendix Table 3.

Association between subjective sleep quality and risk of first-onset TMD^(a) among 2,410 OPPERA prospective cohort study participants adjusted for baseline predictors of TMD; hazard ratios (95% confidence limits) (n=2,410)

	Hazard Ratio (95% confidence limits)
Baseline PSQI score per 2.8 units	1.04 (0.90, 1.20)
Any non-pain facial symptom at baseline [ref=None]	1.74 (1.28, 2.38)*
Any comorbid health condition at baseline [ref=None]	1.64 (1.21, 2.21)*
Baseline PSS score per 6.4 units	1.16 (1.00, 1.35)
Baseline PILL score per 21.0 units	1.16 (1.01, 1.35)*
Time-varying covariate per 2.0 units	1.23 (1.07, 1.42)*
Model fit: likelihood ratio statistic (df)	135.2 (15)

^(a)The model adjusts for study site, age, sex and race/ethnicity

^*The symbol denotes a statistically significant predictor of first-onset TMD