A Study to Learn About the Relationship Between Hepatic Impairment and Myelosuppression (Decreased Bone Marrow Function) in Breast Cancer Patients Treated With the Study Medicine Palbociclib (Pal-bow-sai-klib)

Evaluation of Incidence of Myelosuppression (Grade 4 Neutropenia) in Breast Cancer Patients With Mild, Moderate or Severe Hepatic Impairment Treated With Palbociclib Compared to Patients With Reserved Hepatic Function in the Post-marketing Setting: Cohort Study Using the Medical Information Database Network (MID-NET) Database

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT05912933

Enrollment

1342

Registered

2023-06-22

Start date

2024-08-19

Completion date

2024-08-30

Last updated

2026-06-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast Cancer

Keywords

Safety, database study in Japan, Ibrance, Palbociclib, hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2-), inoperable or recurrent breast cancer

Brief summary

The purpose of this study is to evaluate incidence of grade 4 neutropenia in patients who have hepatic impairment and use the study medicine Palbociclib.This study is seeking participants: - treated with the study medicine Palbociclib - having any breast cancer records in same month as the index date (the first prescription date) - having prescription records of palbociclib from 20 December 2016 to 29 February 2024The study design is a cohort study. This study design uses de-identified patient data from a hospital based electronic medical record and claim database in Japan.One of the important side effects of taking Palbociclib is neutropenia (decreased count of neutrophils - a type of white blood cell). In this study, the relationship between neutropenia caused by Palbociclib and hepatic impairment was studied after it was released to the market. To do that, the study gathered details of breast cancer patients newly treated with Palbociclib from 23 hospitals and 10 medical institutes across Japan.The below patient details were collected: - dose of Palbociclib - other medicines prescribed for cancer - age - gender - past information on cancer treatments - laboratory findings at baselineThe result was based on the neutrophil count collected from the laboratory data. Around 1300 patients newly treated with Palbociclib for breast cancer was calculated by the medical information database network (MID-NET) in 6 years from 15 December 2017.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

OTHER

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

- Having prescription records of palbociclib from 15 December 2017 to 29 February 2024. - Having any breast cancer records in same month as the first prescription date. - Having laboratory tests and visit records (SS-MIX2) on or before 180 days prior to the first prescription date- Having SS-MIX2 hospital-visit records within 180 days before the first prescription date

Exclusion criteria

- Having an absolute neutrophil count (ANC) less than the threshold value for grade 4 neutropenia within 30 days of the first prescription of palbociclib- Having any records of anti-HER2 medication

Design outcomes

Primary

Measure	Time frame	Description
Number of Participants With/Without Hepatic Impairment for Grade 4 Neutropenia in New Users of Palbociclib	20 Dec 2016 through 29 Feb 2024	Grade 4 neutropenia, as the outcome of this study, will be defined as an ANC of less than 0.5 × 10\^9 cells/L or less than 500 cells/mL during the "on-treatment" period.

Secondary

Measure	Time frame	Description
Number of Participants With/Without Hepatic Impairment for Grade 3-4 Neutropenia in New Users of Palbociclib	20 Dec 2016 through 29 Feb 2024	Grade 3-4 neutropenia, as the outcome of this study, will be defined as an ANC of less than 1.0 × 10\^9 cells/L or less than 500 cells/mL during the "on-treatment" period.

Countries

United States

Contacts

STUDY_DIRECTORPfizer CT.gov Call Center

Pfizer

Outcome results