Fig. 1.

Associations between sleep quality and all-cause mortality by ethnicity. Note. Model 1 = adjusted for age, sex and years of full-time education; Model 2 = Model 1 + smoking, alcohol consumption; Model 3 = Model 1 + WHR, anti-hypertensive medication, CVD, diabetes status; Model 4 = Model 1 + Model 2 + Model 3. In all models all three of the sleep quality exposures were entered simultaneously; 95%CI = 95% confidence interval.