Cognitive Rehabilitation Therapy for COVID-19 (CCT-COVID)

July 13, 2026 updated by: VA Office of Research and Development

Cognitive Rehabilitation to Improve Functioning in Veterans Following COVID-19

Cognitive dysfunction, psychiatric symptoms, functional impairment, and disability following COVID-19 negatively impact Veterans' community functioning and quality of life, contribute to significant human suffering, and are costly to VHA. Rehabilitation is a critical priority for Veterans with long COVID. One promising treatment to improve functioning in Veterans with post-COVID-19 cognitive symptoms is Compensatory Cognitive Training (CCT). Previous studies have found that CCT is feasible, acceptable, and efficacious in Veteran populations with multiple sources of cognitive dysfunction. This randomized controlled trial aims to address important RR&D priorities by examining feasibility, acceptability, and preliminary efficacy of a COVID-19-specific rehabilitation intervention, CCT for long COVID (CCT-C) compared to a robust control condition. The proposed study has the potential to improve cognitive function, functional independence, and quality of life for Veterans with late or delayed effects of secondary conditions related to COVID-19 infections.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Enrolling by invitation

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

2-8% of the US population report "long COVID" symptoms - including "brain fog," thinking difficulties, memory problems, and psychiatric symptoms such as sleep disturbance, anxiety, and depression. Rates of post-COVID-19 symptoms are nearly double in the Veteran population. These cognitive symptoms contribute to functional impairments, reduced quality of life, poorer self-reported health status, psychological distress, delayed return to work, new onset disability, reduced community integration, and increased healthcare utilization. One promising treatment to improve both everyday functioning and cognition secondary to post-COVID-19 symptoms is Compensatory Cognitive Training (CCT). Previous studies have found that CCT is feasible, acceptable, and efficacious in Veteran populations with multiple sources of cognitive dysfunction. The proposed CDA provides a golden opportunity to evaluate CCT for Veterans with prolonged COVID-19 symptoms (CCT-C), compared with a robust control condition, Holistic Cognitive Education (HCE). The project closely aligns with current RR&D priorities, by "examining COVID-19-specific rehabilitation interventions and responses to treatment" and by addressing "late or delayed effects of secondary conditions related to COVID-19 infections on impairment and disability." Specific aims are 1) to conduct a pilot randomized controlled trial of remote CCT-C with 70 Veterans (35 CCT-C, 35 HCE) with post-COVID-19 cognitive symptoms to examine feasibility, acceptability, and initial efficacy; 2) to examine the preliminary efficacy of CCT-C in this population on overall functioning, as measured by the World Health Organization's Disability Assessment Schedule (WHODAS 2.0), performance-based measures of functional capacity, and secondary outcomes (cognitive performance, quality of life, self-reported cognitive problems, psychiatric symptoms, sleep disturbance, and engagement in work/community activities); and 3) to explore moderators of outcome (e.g., age, initial COVID-19 severity, baseline cognitive functioning, presence of PTSD/mTBI history; biomarkers related to COVID-19 infection).

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.
Interventional

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.
70

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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

  • United States
    • California
      • San Diego, California, United States, 92161-0002
        • VA San Diego Healthcare System, San Diego, CA

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

Description

Inclusion Criteria:

  • Veterans > 18 years old who are able to provide informed consent
  • Prior participation in SF Parent Study or LA Parent Study
  • Report of cognitive symptoms that Veteran attributes to COVID-19 infection

Exclusion Criteria:

  • Current substance abuse disorder, psychotic disorder, dementia, etc.
  • History of moderate to severe brain injury with loss of consciousness > 30 minutes
  • Auditory or visual impairments that would prevent the ability to participate in assessment procedures
  • Invalid performance on one or more embedded performance validity tests (PVTs)

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

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
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.
Experimental: CCT-C
10-week Compensatory Cognitive Training Group
Behavioral: Compensatory Cognitive Training for COVID-19
CCT-C is a manualized group-based behavioral intervention (10 weeks, 2 hours per week, 20 hours total) designed to improve cognition and everyday functioning in patients with prolonged COVID-19 symptoms
Other Names:
  • CCT-C
Active Comparator: HCE
10-week Holistic Cognitive Education Group
Behavioral: Holistic Cognitive Education
HCE provides the same frequency and amount of therapist and other group member contact as CCT-C, but does not provide training in cognitive or lifestyle strategies addressed in CCT-C. The HCE intervention provides information and discussion regarding common causes of and treatments for cognitive impairment.
Other Names:
  • HCE

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
Change in World Health Organization - Disability Assessment Schedule (WHODAS 2.0)
Time Frame: baseline, 8 weeks
Change in average total score
baseline, 8 weeks

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
Change in objective cognitive performance z score
Time Frame: baseline, 8 weeks
Change in composite z score
baseline, 8 weeks
Change in functional capacity performance z score
Time Frame: baseline, 8 weeks
Change in composite z score
baseline, 8 weeks
Change in Patient Health Questionnaire 9 (PHQ-9)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Generalized Anxiety Disorder 7 (GAD-7)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in PTSD Checklist for DSM-5 (PCL-5)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Cognitive Failures Questionnaire (CFQ)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Neuro-QOL: Applied Cognition General Concerns
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Neuro-QOL: Applied Cognition Executive Functioning
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Neuro-QOL: Fatigue
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in World Health Organization - Quality of Life (WHOQOL-BREF)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks
Change in Insomnia Severity Index (ISI)
Time Frame: baseline, 8 weeks
Change in total score
baseline, 8 weeks

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.
VA Office of Research and Development

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: Tara A Austin, AA, VA San Diego Healthcare System, San Diego, CA

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.
July 1, 2024

Primary Completion (Estimated)

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.
June 30, 2027

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.
March 31, 2029

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).
October 13, 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.
October 13, 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.
October 17, 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.
July 15, 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.
July 13, 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.
July 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.
  • E4764-W

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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