Additional file 1 of Eating habit of adding salt to foods and incident sleep apnea: a prospective cohort study

Additional file 1. Supplementary Table 1. Illnesses definitions in UK Biobank study. Supplementary Table 2. Covariate definitions and methods of assessment. Supplementary Table 3. Cox proportional hazard model for the association between the habit of adding salt to food (binary variable) and incident sleep apnea among participants in UK biobank (n = 488,196). Supplementary Table 4. Sensitivity analyses for association of the frequency of adding salt to foods with incident sleep apnoea.