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Massive ovarian cancer screening trial tests whether early detection cuts deaths

NCT ID NCT01696994

Knowledge-focused Sponsor: National Cancer Institute (NCI) 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 24, 2026 · Updated 2 times

Summary

This study enrolled over 78,000 women to see if regular screening with ultrasound and blood tests can lower the number of deaths from ovarian cancer. Participants were randomly assigned to either receive screening or usual care. The goal is to find out if catching the cancer early helps women live longer.

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 show that regular screening reduces deaths from ovarian cancer, leading to better early detection guidelines.
What could go wrong
This trial is observational and completed enrollment; screening may not reduce deaths and could lead to false alarms or unnecessary procedures.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

78,216 people

The number who actually took part.

Started

Nov 1993

Expected to finish

Jun 2027

An estimate. End dates often move.

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

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

Ages

55 to 74 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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.

Exclusion Criteria: * Women who at the time of randomization are less than 55 or greater than or equal to 75 years of age * Individuals undergoing treatment for cancer at this time, excluding basal-cell and squamous-cell skin cancer * Individuals with known prior cancer of the colon, rectum, lung, or ovary * This includes primary or metastatic PLCO cancers * Individuals with previous surgical removal of the entire colon or one lung * Until October 1996, women with previous surgical removal of both ovaries were excluded from the trial. In order to increase the enrollment of women into the trial, beginning in October 1996, these women were no longer excluded for this reason. * Individuals who are participating in another cancer screening or cancer primary prevention trial * Prior to April 1, 1999 women were excluded from the trial if they were currently taking or had taken Tamoxifen or Evista\\Raloxifene in the past 6 months. As of April 1999 based on a decision from the PLCO Ovary Subcommittee, women who have or are currently taking Tamoxifen or Evista\\Raloxifene are not excluded from participation. * Individuals who are unwilling or unable to sign the informed consent form * Individuals who have had a colonoscopy, sigmoidoscopy, or barium enema in the past three years

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Conditions

The condition(s) this trial relates to.

ovarian cancer ovarian carcinoma ovarian germ cell tumor

As listed by the trial registrant

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

Ovarian carcinoma Ovarian germ cell tumor

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    Bethesda, Maryland, 20892, United States

More trials for these conditions

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