Table 2

ROC curve analysis of AG/ACAG values and short-term mortality

FactorAUC95% CICut-offSensitivitySpecificityYouden’s index
ICU mortality
(MIMIC-IV)
AG0.6540.613 to 0.69615.50.7580.4260.184
ACAG0.6320.589 to 0.67419.60.6800.5320.212
ICU mortality
(eICU-CRD)
AG0.5940.546 to 0.64218.10.5260.6540.180
ACAG0.6130.566 to 0.66025.40.3510.8570.208
Hospital mortality
(MIMIC-IV)
AG0.5990.558 to 0.64120.50.3460.7960.142
ACAG0.6290.589 to 0.66924.60.3220.8690.191
Hospital mortality
(eICU-CRD)
AG0.6030.559 to 0.64718.10.5230.6730.196
ACAG0.6280.585 to 0.67121.60.5270.7050.232
28-day mortality
(MIMIC-IV))
AG0.6140.574 to 0.65421.50.2950.8700.165
ACAG0.6410.602 to 0.68022.90.4000.8050.205
  • AUC, area under curve; CI, confidence interval; AG, anion gap; ACAG, albumin-corrected anion gap.