Fig 3.

Hospital mortality and admission chloride level in the overall population, based on the admission sodium (A), admission anion gap (B), and acid-base status (C). Hypochloremia is defined as chloride <98 mEq/L and hyperchloremia is defined as chloride ≥108 mEq/L. Hyponatremia is defined as sodium <135 and hypernatremia is defined as sodium ≥145. Metabolic acidosis is defined as bicarbonate <22 and metabolic alkalosis is defined as bicarbonate >26.