Validation of the Odesa Criteria 2026 for Autoimmune Pancreatitis (ОС26)

May 23, 2026 updated by: Oleg Dovbenko, MD, Military Medical Clinical Center of the Southern Region, Ukraine

Validation of the Odesa Criteria 2026 (OC26) for the Diagnosis of Autoimmune Pancreatitis

This ambispective observational study aims to validate the Odesa Criteria 2026 (OC26), a flexible domain-based point scoring system for diagnosing autoimmune pancreatitis. The study evaluates diagnostic accuracy and reproducibility of OC26 across clinical, serological, morphological, and histological domains.

Study Overview

Status

Status

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

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.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The study uses an ambispective design, including both retrospective and prospective data collection.

Autoimmune pancreatitis (AIP) remains a diagnostic challenge due to its heterogeneous clinical presentation and overlap with pancreatic cancer and other inflammatory conditions. The Odesa Criteria 2026 (OC26) were developed as a flexible, domain-based point scoring system integrating four diagnostic domains: morphology, serology, clinical features, and histology. Each domain contributes weighted points toward a total diagnostic score, enabling structured and reproducible assessment across diverse patient phenotypes.

This ambispective observational study evaluates the diagnostic performance of OC26 in real-world clinical practice. The study assesses sensitivity, specificity, predictive values, likelihood ratios, and overall diagnostic accuracy using final clinical diagnosis as the reference standard. Additional analyses include interobserver agreement for domain scoring, diagnostic performance of individual domains, ROC curve analysis for the total OC26 score, and determination of the optimal diagnostic cut-off.

The study aims to validate OC26 as a practical, scalable, and reproducible diagnostic tool for autoimmune pancreatitis, supporting its implementation in routine clinical workflows and future international guideline development.

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 (Estimated)

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.
82

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 Contact Backup

Study Locations

  • Ukraine
      • Odesa, Ukraine
        • Recruiting
        • Military Medical Clinical Center of the Southern Region
        • Contact:
        • Contact:

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

Patients undergoing diagnostic evaluation for suspected autoimmune pancreatitis at a tertiary referral center. The study includes both retrospective cases with complete diagnostic data and prospective participants evaluated according to the Odesa Criteria 2026 (OC26).

Description

Inclusion Criteria:

  • Adults (≥18 years) undergoing evaluation for suspected autoimmune pancreatitis.
  • Availability of clinical, serological, imaging, and/or histological data required for OC26 scoring.
  • Ability to provide informed consent (for prospective participants).

Exclusion Criteria:

  • Confirmed alternative diagnosis explaining pancreatic findings (e.g., pancreatic cancer, acute pancreatitis of other etiology).
  • Incomplete diagnostic data preventing OC26 scoring.
  • Prior pancreatic surgery altering diagnostic interpretation.

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.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
AIP Suspected Cohort
Patients evaluated for suspected autoimmune pancreatitis. Participants undergo standard clinical, serological, imaging, and histological assessment according to the Odesa Criteria 2026 (OC26). No interventions are assigned as this is an observational study.
Other: No intervention (observational study)
Participants receive no assigned intervention. Diagnostic evaluation follows routine clinical practice.

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
Diagnostic accuracy of the Odesa Criteria 2026 (OC26) as a domain-based scoring system for autoimmune pancreatitis
Time Frame: At completion of baseline diagnostic assessment
Evaluation of the diagnostic performance of the Odesa Criteria 2026 (OC26), a domain-based point scoring system for autoimmune pancreatitis (AIP). The analysis includes calculation of sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratios, and overall diagnostic accuracy using final clinical diagnosis as the reference standard.
At completion of baseline diagnostic assessment

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
Interobserver agreement for OC26 domain scoring
Time Frame: At completion of baseline diagnostic workup
Assessment of interobserver agreement for each domain of the Odesa Criteria 2026 (OC26), including morphology, serology, clinical features, and histology. Agreement will be quantified using Cohen's kappa (κ) statistics for categorical items and intraclass correlation coefficients (ICC) for continuous or ordinal components. The analysis evaluates reproducibility of domain-level scoring among independent reviewers.
At completion of baseline diagnostic workup
Diagnostic performance of individual OC26 domains
Time Frame: At completion of baseline diagnostic workup
Evaluation of the diagnostic performance of each OC26 domain (morphology, serology, clinical, histology) in identifying autoimmune pancreatitis. For each domain, sensitivity, specificity, positive predictive value, negative predictive value, and area under the ROC curve (AUC) will be calculated using final clinical diagnosis as the reference standard.
At completion of baseline diagnostic workup
ROC curve analysis for total OC26 score
Time Frame: At completion of baseline diagnostic workup
Receiver operating characteristic (ROC) curve analysis of the total OC26 score to determine its discriminative ability for diagnosing autoimmune pancreatitis. The area under the curve (AUC) will be calculated, and performance will be compared across predefined subgroups.
At completion of baseline diagnostic workup
Optimal cut-off value for OC26 total score
Time Frame: At completion of baseline diagnostic workup
Determination of the optimal diagnostic cut-off for the OC26 total score using Youden's index and other threshold-optimization methods. Sensitivity, specificity, and accuracy at the optimal cut-off will be reported.
At completion of baseline diagnostic workup

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.
Military Medical Clinical Center of the Southern Region, Ukraine

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Oleg Dovbenko, Odesa Regional Clinical Medical Center

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

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.
May 1, 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.
May 1, 2026

Study Completion (Estimated)

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.
December 1, 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).
April 11, 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.
April 11, 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.
April 17, 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.
May 28, 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.
May 23, 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.
April 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.
  • OC26-AIP

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 study involves sensitive clinical information and the dataset is not intended for external distribution. Only aggregated, de-identified results will be available in publications.

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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