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Your cell phone could reveal your Body's hidden clock

NCT ID NCT02249793

Knowledge-focused Sponsor: University of Pennsylvania 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether patterns in cell phone use (like calls and texts) are linked to blood pressure and metabolism over a 24-hour day. Six healthy adults aged 25-35 with Android phones participated. The goal was to better understand how daily behaviors relate to body functions, not to test a treatment.

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

6 people

The number who actually took part.

Start date

Sep 2014

Finished

Dec 2017

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 volunteers

Ages

25 to 35 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: * Volunteers must be in good health as based on medical history, physical examination, vital signs, and laboratory tests as deemed by PI; * Volunteers are capable of giving informed consent; * 25-35 years of age; * Own a cell phone with internet access (smartphone with Android operating system only at this point) which installs the social sensing application ginger.io; * Non-smoking; * Male subjects only if feasible during recruitment; and * In case female volunteers are invited to enroll: non-pregnant, female subjects must consent to a urine pregnancy test. Exclusion Criteria: * Recent travel across time zones (within the past month); * Planned travel across time zones during the planned study activities; * Volunteers with irregular work hours, e.g. night shifts. * Use of illicit drugs; * Subjects, who have received an experimental drug, used an experimental medical device within 30 days prior to screening, or who gave a blood donation of ≥ one pint within 8 weeks prior to screening. * Subjects with any abnormal laboratory value or physical finding that according to the investigator may interfere with interpretation of the study results, be indicative of an underlying disease state, or compromise the safety of a potential subject.

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Conditions

The condition(s) this trial relates to.

Social Behavior

As listed by the trial registrant

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

Healthy

Contacts and locations

Locations

  • Institute for Translational Medicine and Therapeutics (ITMAT), University of Pennsylvania

    Philadelphia, Pennsylvania, 19104, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.