Pretreatment Low Serum Sodium as a Prognostic Factor for Patients with Esophageal Cancer Treated with Radiotherapy or Chemoradiotherapy

Figure 2

(a) Kaplan–Meier survival curves of the serum sodium concentration at the median cutoff value (140.0 mmol/L) are shown (). (b) Kaplan–Meier survival curves of the serum sodium concentration at the median cutoff value (140.0 mmol/L) are shown ().

(a)

(b)