Fig. 5

Subgroup analysis of the association between spot urinary sodium and all-cause mortality. Cox proportional hazard regression models were adjusted for age, sex, body mass index, estimated glomerular filtration rate, current smoking, current drinking, hypertension, diabetes mellitus, dyslipidemia, anti-hypertensive medication, antidiabetic medication, and antilipidemic medication. When a variable was assessed for its possible modification on the association of spot urinary sodium and all-cause mortality, the stratified variable was not adjusted repeatedly. CI, confidence interval; HR, hazard ratio. CI, confidence interval; HR, hazard ratio