ICU Admission Diagnoses and ICU Mortality

February 2, 2026 updated by: Mehmet Akif Yilmaz, Ataturk University

Association of Admission Syndromic Diagnoses With ICU Mortality in a Mixed Adult Intensive Care Unit: Retrospective Cohort

This retrospective cohort study will evaluate whether syndromic clinical diagnoses present at ICU admission are associated with ICU mortality, independent of physiologic severity scores. Adult patients admitted to a tertiary mixed ICU during 2025 will be assessed.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

Data will be obtained retrospectively from the hospital information system and ICU clinical records. Variables will be recorded based on the first 24 hours after ICU admission. Demographics, admission characteristics, comorbidities, severity scores (APACHE II, SAPS, SOFA), and admission syndromic diagnoses (e.g., sepsis/septic shock, acute respiratory failure, ARDS, MODS) will be collected. The primary outcome is ICU mortality; secondary outcomes include ICU length of stay and ICU discharge disposition.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
1248

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Adult patients admitted to the tertiary mixed ICU of Atatürk University Faculty of Medicine (Department of Anesthesiology and Reanimation) between January 1 2024 and December 31 2025. Data will be collected retrospectively from hospital information systems and ICU records, based on the first 24 hours after ICU admission.

Description

Inclusion Criteria:

  • Adult patients (≥18 years) admitted to the ICU between January 1, 2025 and December 31, 2025.
  • If a patient has more than one ICU admission during the study period, only the first ICU admission will be included.

Exclusion Criteria:

  • ICU stay <24 hours.
  • Missing essential data preventing assessment of the primary outcome (ICU mortality) and/or calculation of severity scores (APACHE II, SAPS, SOFA).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Adult ICU admissions (2025)
Adult patients (≥18 years) admitted to a tertiary mixed intensive care unit between January 1, 2025 and December 31, 2025. For patients with multiple ICU admissions, only the first ICU admission will be included. Data will be abstracted retrospectively from electronic medical records and ICU charts; variables will be recorded based on the first 24 hours after ICU admission.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
ICU mortality
Time Frame: From ICU admission until ICU discharge (end of index ICU stay), assessed up to 90 days
Death occurring during the index ICU stay (ICU mortality), abstracted from electronic medical records.
From ICU admission until ICU discharge (end of index ICU stay), assessed up to 90 days

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
ICU length of stay (LOS)
Time Frame: From ICU admission to ICU discharge (index ICU stay), assessed at ICU discharge (up to 90 days)
ICU length of stay (days) during the index ICU admission, calculated as the difference between ICU admission and ICU discharge timestamps in the electronic medical record.
From ICU admission to ICU discharge (index ICU stay), assessed at ICU discharge (up to 90 days)
ICU discharge disposition
Time Frame: At ICU discharge (index ICU stay; assessed at the time of ICU discharge in the medical record, up to 90 days)
Disposition at ICU discharge categorized as: death in ICU, transfer to hospital ward, or transfer to another facility; determined from the ICU discharge documentation in the electronic medical record.
At ICU discharge (index ICU stay; assessed at the time of ICU discharge in the medical record, up to 90 days)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Ataturk University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

  • Le Gall JR, Lemeshow S, Saulnier F. A new Simplified Acute Physiology Score (SAPS II) based on a European/North American multicenter study. JAMA. 1993 Dec 22-29;270(24):2957-63. doi: 10.1001/jama.270.24.2957. Erratum in: JAMA 1994 May 4;271(17):1321. PMID: 8254858.
  • Knaus WA, Draper EA, Wagner DP, Zimmerman JE. APACHE II: a severity of disease classification system. Crit Care Med. 1985 Oct;13(10):818-29. PMID: 3928249.
  • Angus DC, van der Poll T. Severe sepsis and septic shock. N Engl J Med. 2013 Nov 21;369(21):2063. doi: 10.1056/NEJMc1312359. PMID: 24256390
  • Vincent JL, Marshall JC, Namendys-Silva SA, François B, Martin-Loeches I, Lipman J, Reinhart K, Antonelli M, Pickkers P, Njimi H, Jimenez E, Sakr Y; ICON investigators. Assessment of the worldwide burden of critical illness: the intensive care over nations (ICON) audit. Lancet Respir Med. 2014 May;2(5):380-6. doi: 10.1016/S2213-2600(14)70061-X. Epub 2014 Apr 14. PMID: 24740011

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 30, 2026

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
February 2, 2026

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
February 2, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 8, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 22, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 27, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 4, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 2, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ICU-RETRO-2025
  • 2026/1 (Atatürk University Clinical Research Ethics Committee)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data will not be shared because the dataset is derived from retrospective hospital records and contains potentially identifiable information.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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