Table 1. Prevalence of Abnormal Values of Sodium, Chloride, and Anion Gap

Reference ranges for central laboratory measurement: sodium 135–145, chloride 95–107, AG 12–20 mEq/l.

Reference ranges for point-of-care measurements: sodium 135–148, chloride 98–106, AG 12–20 mEq/l.

AG = anion gap; BE = base excess.