DOI: 10.5061/dryad.4mw6m90kh
title: Data from: The impact of serum potassium ion variability on 28-day mortality in ICU patients

description: Objective: Potassium ion disorders are prevalent among patients in
 Intensive Care Units (ICUs), yet there is a notable deficiency in
 established protocols and supplemental plans for potassium management.
 This retrospective study conducted at a single center aims to explore the
 relationship between potassium levels, their variability, and the 28-day
 mortality rate in ICU patients. Methods: This study analyzed patients
 admitted to the ICU within one year. We assessed serum potassium
 variability using the coefficient of variation and categorized it into
 four quartile groups (Q1, Q2, Q3, Q4). Additionally, patients were
 classified into six groups based on serum potassium concentrations. The
 associations between these categories and the 28-day mortality rate were
 evaluated using binary logistic regression, adjusting for potential
 confounders.
description: Within 28 days of admission to the ICU, potassium levels were
 systematically measured every 12 hours. Data collection commenced from the
 first day of the patient's ICU stay, encompassing a comprehensive
 range of variables. These variables included demographic information (age,
 gender), the duration of the hospital stay, clinical outcomes at 28 days,
 heart rate, systolic and diastolic blood pressure, mean arterial pressure,
 the Sequential Organ Failure Assessment (SOFA) score, pH levels, eGFR,
 creatinine, bilirubin, blood glucose, urine output, and the administration
 of insulin, potassium chloride, and furosemide. For patients who die
 within 28 days, if the blood drawn before death happens to occur within 12
 hours, the abnormal blood drawn results will be discarded and then
 incorporated into other blood drawn results at similar times. This
 approach was adopted to ensure the integrity of the data and to minimize
 the influence of external factors.
description: # Data from: The impact of serum potassium ion variability on 28-day
 mortality in ICU patients
 [https://doi.org/10.5061/dryad.4mw6m90kh](https://doi.org/10.5061/dryad.4mw6m90kh) ## Description of the data and file structure Within 28 days of admission to the ICU, potassium levels were systematically measured every 12 hours. Data collection commenced from the first day of the patient's ICU stay, encompassing a comprehensive range of variables. These variables included demographic information (age, gender), the duration of the hospital stay, clinical outcomes at 28 days, heart rate, systolic and diastolic blood pressure, mean arterial pressure, the Sequential Organ Failure Assessment (SOFA) score, pH levels, eGFR, creatinine, bilirubin, blood glucose, urine output, and the administration of insulin, potassium chloride, and furosemide. For patients who die within 28 days, if the blood drawn before death happens to occur within 12 hours, the abnormal blood drawn results will be discarded and then incorporated into other blood drawn results at similar times. This approach was adopted to ensure the integrity of the data and to minimize the influence of external factors. The variability of serum potassium ion concentration is defined by the coefficient of variation, which is calculated as the ratio of standard deviation to the mean serum potassium ion concentration and expressed as a percentage (coefficient of variation=standard deviation/mean x 100%) Measurement unit: Heart Rate, beats per minute; Systolic Pressure, mmHg; Diastolic Pressure, mmHg; Mean Arterial Pressure, mmHg; Potassium Minimum, mmol/L; Potassium Maximum, mmol/L; Potassium Average, mmol/L; Age, years; ICU Hospitalization Days; Glucose Average, mmol/L; Glucose Maximum, mmol/L; Glucose Minimum, mmol/L; Urine Output, ml; Insulin, u; Potassium Chloride, g; Furosemide, mg; Oxygenation Index, mmHg; Creatinine, μmol/L; Bilirubin, μmol/L; and Platelet, 10*9/L.