Diagnostic Performance of Serum Calprotectin in Acute Appendicitis (SCP-AA)

June 7, 2026 updated by: Fatih Sultan Mehmet Training and Research Hospital

Diagnostic Performance of Serum Calprotectin in Acute Appendicitis: A Prospective Comparative Analysis Study

This prospective observational study evaluated the diagnostic performance of serum calprotectin in patients presenting with acute abdominal pain and suspected acute appendicitis. Patients with histopathologically confirmed acute appendicitis were compared with patients diagnosed with nonspecific abdominal pain. Serum calprotectin levels were analyzed and compared with conventional inflammatory markers and the Alvarado score to assess their diagnostic value in acute appendicitis.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Acute appendicitis is one of the most common causes of acute abdominal pain requiring emergency surgical intervention. However, establishing an accurate diagnosis may be difficult, particularly in patients presenting with nonspecific abdominal pain or atypical clinical findings. Conventional inflammatory markers and clinical scoring systems are useful adjuncts, but their diagnostic accuracy remains limited.

This prospective single-center observational study evaluated the diagnostic performance of serum calprotectin in adult patients presenting with acute abdominal pain and suspected acute appendicitis. Patients with histopathologically confirmed acute appendicitis were compared with a control group consisting of patients diagnosed with nonspecific abdominal pain after clinical, laboratory, radiological evaluation, and follow-up.

Serum calprotectin concentrations were measured and compared with white blood cell count, C-reactive protein, ferritin, and the Alvarado score. The relationship between serum calprotectin levels and histopathological severity of appendicitis was also assessed.

The primary objective of the study was to determine the diagnostic accuracy of serum calprotectin in distinguishing acute appendicitis from nonspecific abdominal pain.

Study Type

Observational

Enrollment (Actual)

74

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)
    • ATASEHIR
      • Istanbul, ATASEHIR, Turkey (Türkiye), 34752
        • Fatih Sultan Mehmet Training and Research 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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Adult patients presenting to the emergency department with acute abdominal pain and suspected acute appendicitis. Participants were divided into two groups: patients diagnosed with acute appendicitis and patients with non-specific abdominal pain.

Description

Inclusion Criteria:

  • Age between 18 and 75 years
  • Presentation to the emergency department with acute abdominal pain and suspected acute appendicitis
  • Willingness to participate and provide informed consent

Exclusion Criteria:

  • Previous abdominal surgery
  • Chronic inflammatory or autoimmune disease
  • Active infection other than suspected appendicitis
  • Use of systemic anti-inflammatory or immunosuppressive therapy
  • Pregnancy
  • Incomplete clinical or laboratory data

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
Intervention / Treatment
Acute Appendicitis
Patients with histopathologically confirmed acute appendicitis who underwent appendectomy.
Diagnostic test: Serum Calprotectin Measurement
Measurement of serum calprotectin levels using ELISA for diagnostic evaluation of acute appendicitis.
Non-specific Abdominal Pain
Patients presenting with nonspecific abdominal pain without evidence of appendicitis during follow-up.
Diagnostic test: Serum Calprotectin Measurement
Measurement of serum calprotectin levels using ELISA for diagnostic evaluation of acute appendicitis.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Diagnostic accuracy of serum calprotectin for acute appendicitis
Time Frame: At admission to the emergency department
Comparison of serum calprotectin levels between patients with acute appendicitis and nonspecific abdominal pain.
At admission to the emergency department

Collaborators and Investigators

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

Sponsor

Fatih Sultan Mehmet Training and Research Hospital

Investigators

  • Principal Investigator: fatih kilic, MD, Fatih Sultan Mehmet Training 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)

December 13, 2015

Primary Completion (Actual)

April 19, 2016

Study Completion (Actual)

April 21, 2016

Study Registration Dates

First Submitted

June 2, 2026

First Submitted That Met QC Criteria

June 7, 2026

First Posted (Actual)

June 11, 2026

Study Record Updates

Last Update Posted (Actual)

June 11, 2026

Last Update Submitted That Met QC Criteria

June 7, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • FSMEAH-KAEK-2015-53

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

individual participant data sharing plans are currently undecided.

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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