Figure 3

Non-linear association between the TCO2 levels and the risk of patient death. (A) Univariate analysis (B) Multivariate analysis. These graphs were adjusted for TCO2 level (as continuous variable), age, sex, history of hypertension and diabetes, baseline kidney function (as continuous variable using MDRD-eGFR), usage of sodium bicarbonate, RAAS blockades and diuretics.