Prevalence and Risk Factors for Postoperative Delirium 48 Hours After Surgery (DELPO)

March 18, 2026 updated by: Fundacin Biomedica Galicia Sur

Prevalence and Risk Factors for Postoperative Delirium 48 Hours After Surgery: Multicenter Cohort Study.

To determine the overall prevalence of postoperative delirium (POI) and its association with different risk factors in order to establish prevention plans to reduce its incidence and/or duration in Spanish hospitals.

To this end, patients over 18 years of age who underwent urgent and scheduled surgery requiring hospital admission under any type of anaesthesia during two specific days will be recruited and pre-, intra- and postoperative data will be collected.

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.

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.

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.
2442

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

  • Spain
      • A Coruña, Spain, 15006
        • Hospital Complex of A Coruña
      • Alicante, Spain, 03550
        • San Juan University Hospital
      • Alicante, Spain, 03550
        • Sant Joan University Hospital of Alacant
      • Badajoz, Spain, 06080
        • University Hospital of Badajoz
      • Barcelona, Spain, 08025
        • Santa Creu i Sant Pau Hospital
      • Barcelona, Spain, 08036
        • Clinic Hospital of Barcelona
      • Burgos, Spain, 09006
        • University Hospital of Burgos
      • Cáceres, Spain, 10003
        • San Pedro de Alcántara Hospital
      • Córdoba, Spain, 14004
        • Reina Sofia Hospital
      • Córdoba, Spain, 14940
        • Infanta Margarita Hospital
      • Girona, Spain, 17007
        • Josep Trueta University Hospital
      • Granada, Spain, 18016
        • San Cecilio University Hospital
      • León, Spain, 24071
        • Hospital of León
      • Lugo, Spain, 27003
        • Lucus Augusti Universitary Hospital
      • Madrid, Spain, 28046
        • La Paz University Hospital
      • Madrid, Spain, 28922
        • Hospital Universitario Fundacion Alcorcon
      • Madrid, Spain, 28040
        • San Carlos Clinical Hospital
      • Madrid, Spain, 28006
        • La Princesa University Hospital
      • Madrid, Spain, 28041
        • 12 Octubre University Hospital
      • Madrid, Spain, 28003
        • San José and Santa Adela Cruz Roja Central Hospital
      • Madrid, Spain, 28031
        • Infanta Leonor University Hospital
      • Madrid, Spain, 28046
        • La Paz Universitary Hospital
      • Ourense, Spain, 32005
        • Hospital Complex of Ourense
      • Pontevedra, Spain, 36071
        • Montecelo Hospital
      • Salamanca, Spain, 37007
        • University Hospital of Salamanca
      • Seville, Spain, 41009
        • Virgen de la Macarena University Hospital
      • Valencia, Spain, 46026
        • La Fe University and Polytechnic Hospital
      • Valencia, Spain, 46010
        • Clinic Hospital of Valencia
      • Valencia, Spain, 46014
        • General University Hospital of València
      • Valencia, Spain, 46017
        • Doctor Peset Universitary Hospital
      • Valladolid, Spain, 47003
        • University Clinical Hospital of Valladolid
      • Vigo, Spain, 36211
        • Ribera Povisa Hospital
      • Vigo, Spain, 36312
        • Álvaro Cunqueiro University Hospital
      • Zaragoza, Spain, 50009
        • Miguel Servet University Hospital
    • A Coruña
      • Ferrol, A Coruña, Spain, 15405
        • Hospital Complex of Ferrol
      • Santiago de Compostela, A Coruña, Spain, 15706
        • Santiago de Compostela University Clinical Hospital
    • Alicante
      • Elche, Alicante, Spain, 03203
        • General University Hospital of Elche
    • Balearic Islands
      • Palma de Mallorca, Balearic Islands, Spain, 07120
        • University Hospital of Son Espases
    • Barcelona
      • Badalona, Barcelona, Spain, 08916
        • Germans Trials i Pujol Hospital
      • L'Hospitalet de Llobregat, Barcelona, Spain, 08907
        • University Hospital of Bellvitge
      • Sabadell, Barcelona, Spain, 08208
        • Parc Taulí Hospital
    • Cantabria
      • Santander, Cantabria, Spain, 39008
        • Marques De Valdecilla University Hospital
    • Castelló
      • Castellon, Castelló, Spain, 12004
        • General University Hospital of Castellón
    • Castellón
      • Vinaròs, Castellón, Spain, 12500
        • Comarcal Hospital of Castellón
    • Giguzkoa
      • Donostia / San Sebastian, Giguzkoa, Spain, 20014
        • Donostia University Hospital
    • Las Palmas
      • Las Palmas de Gran Canaria, Las Palmas, Spain, 35010
        • Doctor Negrín University Hospital
    • Lugo
      • Burela de Cabo, Lugo, Spain, 27880
        • Public Hospital of Mariña
      • Monforte de Lemos, Lugo, Spain, 27400
        • Regional Hospital of Monforte de Lemos
    • Madrid
      • Alcalá de Henares, Madrid, Spain, 28805
        • Príncipe de Asturias University Hospital
      • Coslada, Madrid, Spain, 28822
        • Henares Hospital
      • Fuenlabrada, Madrid, Spain, 28942
        • Fuenlabrada University Hospital
      • Majadahonda, Madrid, Spain, 28222
        • Puerta de Hierro University Hospital
      • Móstoles, Madrid, Spain, 28935
        • University Hospital of Móstoles
      • Pozuelo de Alarcón, Madrid, Spain, 28223
        • Quirónsalud University Hospital
      • San Sebastián de los Reyes, Madrid, Spain, 28702
        • Infanta Sofía University Hospital
      • Torrejón de Ardoz, Madrid, Spain, 28806
        • Quirónsalud Valle del Henares Hospital
    • Principality of Asturias
      • Gijón, Principality of Asturias, Spain, 33394
        • Cabueñes University Hospital
      • Oviedo, Principality of Asturias, Spain, 33011
        • Central University Hospital of Asturias
    • Santa Cruz De Tenerife
      • San Cristóbal de La Laguna, Santa Cruz De Tenerife, Spain, 38320
        • Canarias University Hospital
    • Valencia
      • Gandia, Valencia, Spain, 46702
        • Francesc de Borja Regional Hospital
      • Manises, Valencia, Spain, 46940
        • Manises Hospital
    • Vizcaya
      • Barakaldo, Vizcaya, Spain, 48903
        • Cruces University Hospital
      • Bilbao, Vizcaya, Spain, 48013
        • Basurto University 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

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

Probability Sample

Study Population

Patients over 18 years of age undergoing urgent and scheduled surgery requiring hospital admission, under any type of anaesthesia.

Description

Inclusion Criteria:

  • Patients over 18 years of age undergoing urgent and scheduled surgery requiring hospital admission, under any type of anaesthesia.

Exclusion Criteria:

  • Presence of pre-surgical delirium.
  • Outpatient 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 / 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.
Single arm
Patients over 18 years of age undergoing urgent and scheduled surgery requiring hospital admission, under any type of anaesthesia.
Procedure: Any surgery under any type of anaesthesia.
Any surgery under any type of anaesthesia.

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
Prevalence of Postoperative Delirium in Spanish hospitals.
Time Frame: 2 days
To determine the overall prevalence of Postoperative Delirium in Spanish hospitals.
2 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
Prevalence of Postoperative Delirium by surgical speciality.
Time Frame: 2 days
To determine the prevalence of Postoperative Delirium by surgical speciality.
2 days
Risk factors on the prevalence of Postoperative Delirium
Time Frame: 2 days
Determine the influence of risk factors on the prevalence of Postoperative Delirium
2 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.
Fundacin Biomedica Galicia Sur

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.
November 14, 2023

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.
December 1, 2024

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.
December 1, 2024

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).
November 8, 2023

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.
November 8, 2023

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.
November 13, 2023

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.
March 20, 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.
March 18, 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.
March 1, 2026

More Information

Terms related to this study

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.
  • DELPO

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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