Fig. 2
From: Fasting serum potassium and long-term mortality in healthy men
Multivariable adjusted hazard ratio (HR) for a (upper panel) cancer death and b (lower panel) cardiovascular death by levels of potassium at baseline. Bars indicate 95% confidence intervals. Restricted cubic spline function of potassium with four knots chosen according to Harrell’s recommended percentiles. The reference group was set to the middle value, K = 4.3 mmol/L. Estimates for values ≤3.2 and ≥ 5.4 were not presented due to low numbers. Dashed lines indicate the cut-off values for hypokalemia (≤3.5) and hyperkalemia (> 5.0). Hazard ratios were adjusted according to the multivariable models as presented in Table 3