Negative Anion Gaps

Supplementary file 1: Breakdown of the data sources in the study which are included in Supplemental files 2-9. Supplementary file 2: Data from 133 serum/plasma specimens from 116 unique patients (52 female, 64 male) that had a negative anion gap (-1 or lower). The retrospective timeframe is May 1, 2009 through August 18, 2021. Specific data fields include: unique patient identification number (deidentified), order description which generated the anion gap calculation, patient age in years at time of specimen collection, sex of patient as in the electronic medical record, [Na+] in mEq/L, [K+] in mEq/L, [Cl-] in mEq/L, [HCO3-] in mEq/L, calculated anion gap, identification of a recognized cause of low anion gap in the patient, comments on processes likely underlying the negative anion gap, classification of the electrolyte abnormalities that would result in a negative anion gap (low [Na+], high [HCO3-], and/or high [Cl-]), presence or absence of hypoalbuminemia (based on age-related r...