The incidence of hyponatraemia in cancer
patients admitted to our inpatient rehabilitation unit was 41.4%. Median rehabilitation LOS for patients with mild (Na 130–134 mEq/L) and moderate–severe (Na < 130 mEq/L) hyponatraemia was 11 and 15 days, respectively, which was significantly longer than patients with eunatraemia (10 days; P = 0.03).