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Real-World data reveals how palbociclib works in everyday breast cancer care

NCT ID NCT04498481

Knowledge-focused Sponsor: Pfizer 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 reviewed medical records of women with advanced or metastatic HR+/HER2- breast cancer who received Palbociclib combined with hormone therapy in community clinics. The goal was to see how doctors actually prescribe these drugs, how long patients stay on treatment, and what outcomes like survival and side effects occur. It was an observational study, not a test of a new drug, so no direct treatment was given.

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

1 person

The number who actually took part.

Started

Mar 2018

Finished

Jul 2018

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Who is studied

The study will include adult patients aged 18 years and older, diagnosed with HR+/HER2- a/mBC who received Palbociclib combination therapy with AI or fulvestrant on or after 2/3/2015.

Ages

18 years and older

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.

Inclusion Criteria: Patients who are represented in the Vector Oncology Data Warehouse who meet all of the following criteria will be eligible for inclusion in the study. * Female. * Diagnosis of female breast cancer with evidence of metastatic disease or advanced disease. * Diagnosis (confirmed by clinical review) of advanced or metastatic breast cancer at any time, defined as breast cancer at stage IIIb, stage IIIc, or stage IV or identified as having distant metastasis. * Indication in the record of ER or PR positive disease, or absence of any indication of ER and PR negative disease (ie, patients are eligible without affirmative indication of ER/PR+ status as long as ER/PR- indication is not present). * Receipt of a palbociclib plus aromatase inhibitor (AI) or palbociclib plus fulvestrant regimen on 2/3/2015 or later in the advanced and metastatic setting. Data collection will prioritize accrual of patients with 1L use of palbociclib plus AI and with 2L use of palbociclib plus fulvestrant before collecting other use of palbociclib users. * Age greater than or equal to 18 years at A/MBC diagnosis. Exclusion Criteria: -There are no exclusion criteria for this study.

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm hormone receptor-positive breast cancer

As listed by the trial registrant

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

Breast cancer

Contacts and locations

Locations

  • Pfizer United States

    New York, New York, 10017, United States

More trials for these conditions

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