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February 28, 2026Scientific Reports0 citationsOpen Access

Early postoperative factors associated with in-hospital mortality after emergency noncardiac surgery: A Japanese nationwide registry-based intensive care unit cohort study

SGShunsaku GotoHOHiromu OkanoHOHiroshi Okamoto

Key Result

Older age (≥65 years), metastatic cancer, low Glasgow Coma Scale score (≤8), and elevated lactate (≥2 mmol/L) were independently associated with increased in-hospital mortality of 11.9% after emergency noncardiac surgery in Japanese ICU patients.

Key Points

  • The study aims to identify early postoperative factors influencing in-hospital mortality after emergency noncardiac surgery.
  • Conducted a multicenter retrospective cohort study
  • Analyzed data from the Japanese Intensive Care Patient Database registry
  • Included adults admitted to ICU following emergency noncardiac surgery
  • Examined postoperative variables within 24 hours of admission
  • In-hospital mortality rate was 11.9% among the cohort
  • Older age (≥65 years) and metastatic cancer were independent predictors of death
  • Low Glasgow Coma Scale score (≤8) and elevated lactate (≥2 mmol/L) significantly increased mortality risk
  • Other factors associated with mortality included hypotension, tachycardia, and renal dysfunction

Study Design

Type

Observational (n=18,781)

Multicenter

Yes

Structured PICO

P
Population
18,781 adults (aged ≥18 years) admitted to the ICU immediately after emergency noncardiac surgery between January 2020 and December 2023 in Japan. Excluded: elective procedures, cardiovascular surgery, ICU stay <24 hours, ICU readmissions, missing essential variables, and admission after cardiac arrest.
O
Outcome
In-hospital mortality (death occurring during the same hospitalization period in which the patient was admitted to the ICU after emergency noncardiac surgery)hard clinical

Readily obtainable physiological variables within the first 24 hours of ICU admission after emergency noncardiac surgery independently predict in-hospital mortality and can aid in early risk stratification.

Main Result

Effect estimate: aOR 1.89 for age ≥65; aOR 2.60 for metastatic cancer; aOR 3.38 for GCS ≤8; aOR 1.58 for lactate ≥2 mmol/L (95% CI 95% CI 1.69-2.13 for age ≥65; 2.07-3.26 for metastatic cancer; 2.96-3.87 for GCS ≤8; 1.43-1.76 for lactate ≥2 mmol/L)

Limitations

  • Retrospective observational design may be subject to residual confounding
  • Missing data in some variables (e.g., serum albumin and BMI)
  • No causal inference possible, associations do not imply causality
  • Findings are from Japanese ICU population and may have limited generalizability to other settings
  • Retrospective cohort study dependent on registry data accuracy
  • Potential for unmeasured confounding factors (e.g., surgical techniques, anesthetic management, postoperative protocols)
  • Substantial number of patients excluded due to missing data (e.g., albumin, BMI)
  • Inability to adjust for confounding effects of anesthesia and sedation on GCS
  • Limited generalizability to non-Japanese populations and other healthcare systems

Abstract

Emergency noncardiac surgery carries a substantial risk of death, yet factors influencing outcomes immediately after surgery remain unclear. We conducted a multicenter retrospective cohort study of adults admitted to intensive care units immediately after emergency noncardiac surgery between January 2020 and December 2023, using data from the nationwide Japanese Intensive Care Patient Database (JIPAD) registry. Among 18,781 patients, 2,233 (11.9%) died during hospitalization. Independent predictors of mortality included older age (≥65 years; adjusted odds ratio aOR 1.89, 95% confidence interval CI 1.69–2.13), metastatic cancer (aOR 2.60, 95% CI 2.07–3.26), and physiological abnormalities within 24 hours of admission, specifically low Glasgow Coma Scale score (≤8; aOR 3.38, 95% CI 2.96–3.87) and elevated lactate (≥2 mmol/L; aOR 1.58, 95% CI 1.43–1.76). Hypotension, tachycardia, and renal dysfunction were also associated with mortality. These associations remained consistent across age groups and sensitivity analyses that excluded low-risk surgical categories and addressed missing data. In this nationwide cohort, the in-hospital mortality rate was 11.9% after emergency noncardiac surgery. Readily obtainable postoperative variables within the first 24 hours of ICU admission may support prompt risk stratification and help identify high-risk patients who require intensified monitoring.

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Cite This Study

Goto et al. (2026) conducted an observational in Adults (≥18 years) admitted to intensive care units immediately after emergency noncardiac surgery in Japan (n=18,781). Older age (≥65 years), metastatic cancer, low Glasgow Coma Scale score (≤8), and elevated lactate (≥2 mmol/L) were independently associated with increased in-hospital mortality of 11.9% after emergency noncardiac surgery in Japanese ICU patients.

synapsesocial.com/papers/69a286240a974eb0d3c00de6https://doi.org/10.1038/s41598-026-39643-9
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