Simple risk score (MV-SoLdHARP) for intensive care unit readmission or in-hospital death among surgical intensive care unit patients: Derivation and internal validation using a Japanese nationwide inpatient database.

Of 9,392 patients, 99 (1.1%) had adverse events.

The MV-SoLdHARP score comprises mechanical ventilation, Sequential Organ Failure Assessment score at intensive care unit discharge, lactate dehydrogenase >500 U/L, hematocrit <25%, emergency admission, renal disease, and serum potassium >4 mEq/L.

At the moderate-or-higher risk threshold (score ≥5), sensitivity was 12.1%, specificity 99.4%, positive predictive value 18.8%, and negative predictive value 99.1%.