Postoperative Pulmonary Complications in Elderly Patients Undergoing Major Abdominal Surgery (PPC65MAS)

January 7, 2026 updated by: Arif Timuroğlu, MD, Dr Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital

Risk Factors for Postoperative Pulmonary Complications After Major Abdominal Surgery in Patients Aged 65 Years and Older: A Retrospective Observational Study

This study aims to identify the risk factors associated with postoperative pulmonary complications (PPCs) in patients aged 65 years and older who undergo major abdominal surgery.

The study is designed as a retrospective observational analysis using data from patient records.

Understanding these risk factors may help clinicians improve perioperative care and reduce the risk of respiratory problems after surgery in elderly patients.

Study Overview

Status

Completed

Conditions

Detailed Description

This is a retrospective observational study. No follow-up was performed; all data were collected from existing patient records.

Study Type

Observational

Enrollment (Actual)

239

Contacts and Locations

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

Study Locations

  • Turkey (Türkiye)
    • Ankara
      • Ankara, Ankara, Turkey (Türkiye), 06370
        • Dr. Abdurrahman Yurtaslan Ankara Oncology Hospital

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

Ages Eligible for Study

  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population consists of patients aged 65 years and older who underwent major abdominal surgery. Only patients with complete perioperative and postoperative medical records were included. Patients were retrospectively classified into two groups based on the occurrence of postoperative pulmonary complications (PPCs) within the first 24 hours after surgery.

Description

Inclusion Criteria:

  • Patients aged 65 years or older.
  • Patients who underwent major abdominal surgery at [Institution Name].
  • Availability of complete perioperative and postoperative clinical records.
  • Postoperative hospital stay of at least 24 hours.

Exclusion Criteria:

  • Patients younger than 65 years.
  • Patients undergoing minor or non-abdominal surgery.
  • Incomplete or missing perioperative or postoperative medical records.
  • Patients who underwent emergency surgery

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 1: Patients with postoperative pulmonary complications (PPC +)

Group 1 - Patients with postoperative pulmonary complications (PPC +):

This group includes patients aged 65 years and older who underwent major abdominal surgery and developed one or more postoperative pulmonary complications, as defined by EPCO criteria
Group 2: Patients without postoperative pulmonary complications (PPC -)

Group 2 - Patients without postoperative pulmonary complications (PPC -):

This group includes patients aged 65 years and older who underwent major abdominal surgery but did not develop any postoperative pulmonary complications.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Incidence of Postoperative Pulmonary Complications
Time Frame: Within 1 day after surgery
The primary outcome is the occurrence of one or more postoperative pulmonary complications (PPCs) in patients aged 65 years and older undergoing major abdominal surgery. PPCs include pneumonia, respiratory failure, or need for reintubation, as defined by the European Perioperative Clinical Outcome (EPCO) criteria. Data were collected retrospectively from patient records during the postoperative hospital stay.
Within 1 day after surgery

Collaborators and Investigators

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

Sponsor

Dr Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital

Investigators

  • Principal Investigator: Arif Timuroğlu, ankara oncology trainig and research hospital

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)

August 1, 2025

Primary Completion (Actual)

October 1, 2025

Study Completion (Actual)

October 1, 2025

Study Registration Dates

First Submitted

December 14, 2025

First Submitted That Met QC Criteria

December 14, 2025

First Posted (Estimated)

December 29, 2025

Study Record Updates

Last Update Posted (Actual)

January 8, 2026

Last Update Submitted That Met QC Criteria

January 7, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • PPC65-MAS-2024

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

This is a retrospective observational study using existing patient medical records. Individual participant data (IPD) will not be publicly shared to protect patient confidentiality and comply with institutional and ethical regulations. Aggregate data may be shared upon reasonable request.

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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