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Table 5 Correlations of time to treatment and serum potassium levels with ECGs’ alterations, patients’ vital signs, and their laboratory values

From: Clinical and electrocardiogram presentations of patients with high serum potassium concentrations within emergency settings: a prospective study

  Time to hyperkalemia treatmenta Serum potassium levels
Pearson r p-value Pearson r p-value
ECG changes suggestive of hyperkalemia
 PR interval (msec) −0.209 0.130 0.283* 0.038
 QRS duration (msec) −0.033 0.793 0.361** 0.003
 QTc interval (msec) 0.187 0.134 0.123 0.324
 RR interval (msec) −0.163 0.188 0.003 0.984
 Presence of peaked T waveb −0.035 0.779 0.242* 0.041
Vital signs at the time of emergency presentation
 Temperature (°C) 0.057 0.647 −0.048 0.702
 Heart rate (beats per min) 0.155 0.210 0.002 0.990
 Respiratory rate (breaths per min) 0.081 0.512 0.071 0.568
 Systolic pressure −0.133 0.285 −0.224 0.068
 Diastolic pressure 0.073 0.557 −0.234 0.057
 Pulse oximeter (O2 saturation) −0.138 0.267 0.000 0.997
Serum laboratory values at the time of emergency presentation
 Potassium levels −0.044 0.722 1 -
 Creatinine levels (μmol/L) 0.183 0.138 0.347** 0.004
 BUN (mmol/L) 0.166 0.180 0.312** 0.008
 Ph 0.100 0.467 −0.259 0.056
 PCO2 (mmHg) −0.067 0.625 −0.101 0.462
 HCO3 (meq/L) 0.018 0.895 −0.240 0.078
 BE (base excess) (meq/L) −0.056 0.692 −0.158 0.259
 Troponin (ng/ml) 0.160 0.415 −0.281 0.147
 CK-MB (IU/L) −0.040 0.832 0.148 0.428
 CK (U/L) 0.131 0.481 0.373* 0.039
  1. aTime to hyperkalemia treatment was calculated by the difference between the triage time and the first hyperkalemia therapy administration
  2. bPeaked T wave was coded with one when it is present and zero when it is absent
  3. Bold indicates significant statistical correlations: *Correlation is significant at the 0.05 level, while **correlation is significant at the 0.01 level