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Can a smartwatch predict bipolar mood swings?

NCT ID NCT07427966

Knowledge-focused Sponsor: Karolinska Institutet Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study aims to find better ways to diagnose bipolar disorder and predict when mood episodes might happen. Researchers will track sleep, activity, and decision-making in 600 people with bipolar disorder, major depression, or healthy controls using smartwatches and computer tasks. The goal is to identify early warning signs of manic or depressive episodes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could lead to better tools for diagnosing bipolar disorder and predicting mood swings, helping doctors intervene earlier.
What could go wrong
This is an observational study, not testing a treatment. It is still in early stages and may not produce clear or usable markers.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 600 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Dec 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

* Healthy control comes from the Stockholm region general population. * Patients comes from different psychiatric clinics in the Stockholm region.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: For all participants: * Participants must be capable of giving informed consent. * Participants must be able to understand and follow the instructions in the project. * Access to a smartphone and ability to use a smartphone and actimeter. For patients with bipolar disorder * Confirmed diagnosis of bipolar disorder (type 1 or type 2) according to ICD-10 after completion of an assessment at a psychiatric clinic in the Stockholm Region. * Patients must be euthymic (stable and free from affective episodes) at the time of inclusion. * Consent for the research team to access relevant clinical data from patient records. For patients with recurrent depression * Confirmed diagnosis of recurrent depression according to ICD-10 after completion of an assessment at a psychiatric clinic in Region Stockholm. * Patients must have been referred for diagnostic assessment with the question of bipolar disorder. * Patients must be euthymic (stable and free from affective episodes) at the time of inclusion. Exclusion Criteria: Common to all participants: * Active substance abuse or dependence (alcohol or other substances). * Neurological disease or cognitive impairment that may affect study results or compliance with study procedures. * Inability to use a smartphone and smartwatch as required by the study. * Inability to provide valid informed consent. * Inability to understand and follow the study instructions (good knowledge of Swedish is required). For adults without psychiatric illness: * Current or previous psychiatric diagnosis. For patients with bipolar disorder and patients with recurrent depression: * Patients who are in an active affective episode (mania, hypomania or depression) at the time of recruitment.

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Conditions

The condition(s) this trial relates to.

bipolar disorder major depressive disorder mood disorder Motor Activity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Bipolar disorder (BD) Major depressive disorder Mood disorders

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  2. A doctor treating you

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