Longitudinal Assessment of Biomarkers Among Patients With MDD

November 5, 2026 updated by: Paola Pedrelli, Massachusetts General Hospital

This prospective observational study will evaluate whether speech collected through a smartphone application can be used to assess depressive symptom severity and detect symptom changes among adults with major depressive disorder receiving ketamine, esketamine, or infliximab.

Up to 100 participants will complete brief speech tasks and self-report measures of depression, anxiety, and insomnia at baseline, week 2, and week 4. Clinician-rated depression severity will be assessed at baseline and week 4.

Optional passive smartphone data, including activity and sleep measures, may also be collected. The study will examine the agreement between speech-based model predictions and established clinical assessments, as well as the ability of the model to identify symptom severity and treatment response. The study is observational and will not alter participants' clinical treatment. By evaluating remote speech-based assessments alongside optional passive behavioral monitoring, this research may support more effective measurement-based care and improve the evaluation and management of depression in clinical settings.

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

In this observational study, adults with Major Depressive Disorder (MDD) receiving ketamine, esketamine, or infliximab will be followed for up to 4 weeks. Data collection will include smartphone-based speech assessments, clinician-rated assessments of depression, self-report measures of depression, anxiety, and insomnia, and optional passive monitoring of sleep and activity patterns through a mobile application. The study will use machine learning and statistical methods to analyze speech-derived and behavioral data and to develop and evaluate digital biomarkers for assessing depression severity, tracking changes in symptoms over time, and predicting treatment response.

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.
100

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
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Recruiting
        • Depression Clinical Research Program
        • Contact:
        • Contact:
        • Principal Investigator:
          • Paola Pedrelli, Ph.D.

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Participants will be individuals with Major Depressive Disorder receiving ketamine, esketamine, or TNF inhibitor treatment.

Description

Inclusion Criteria:

  • Clinical diagnosis of MDD confirmed via chart review
  • Aged 18 years or older
  • Fluent in reading and speaking English
  • Capable of providing informed consent and complying with the protocol in the estimation of the investigator.
  • Capable of operating the Callyope app
  • Capable of completing speech tasks
  • Owning a smartphone

Exclusion Criteria:

  • Meeting DSM-5 criteria for any psychotic disorder (e.g., schizophrenia or delusional disorder) or a substance use disorder (excluding mild alcohol and cannabis use disorder, which will be permitted).

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

  • Observational Models: OTHER
  • Time Perspectives: PROSPECTIVE

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
Montgomery Åsberg Depression Rating Scale (MADRS)
Time Frame: From baseline to Week 4

The MADRS is a clinician-based assessment of depressive symptoms. Higher scores indicate worse symptoms. Total score can range from 0 to 60.
From baseline to Week 4

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
Generalized Anxiety Disorder-7 (GAD-7)
Time Frame: At baseline, Week 2, and Week 4

The GAD-7 is a self-report questionnaire that assesses anxiety symptoms. Total scores range from 0 to 21, with higher scores indicating more severe anxiety symptoms.
At baseline, Week 2, and Week 4
Quick Inventory of Depressive Symptomatology (QIDS-SR16)
Time Frame: At baseline, Week 2, and Week 4

The QIDS-SR16 is a self-report questionnaire that assesses depressive symptom severity. Total scores range from 0 to 27, with higher scores indicating more severe depressive symptoms.
At baseline, Week 2, and Week 4
Insomnia Severity Index (ISI)
Time Frame: At baseline, Week 2, and Week 4

The ISI is a self-report questionnaire that assesses the severity of insomnia symptoms. Total scores range from 0 to 28, with higher scores indicating more severe insomnia symptoms.
At baseline, Week 2, and Week 4

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.
Massachusetts General 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 (Estimated)

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 5, 2026

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.
September 1, 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.
September 1, 2027

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 5, 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.
November 5, 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.
November 12, 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.
November 12, 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.
November 5, 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.
November 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.
  • 2026P001050

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

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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