A Study Of Treatment Patterns And Clinical Outcomes In Patients Diagnosed With Acute Myeloid Leukemia Who Received Mylotarg in the Real-World

Characteristics, Treatment Patterns, and Clinical Outcomes in Acute Myeloid Leukemia (AML) Patients Using Mylotarg - a US Real-World Study Using Electronic Medical Record Data

The aim of this observational study is to describe treatment patterns and effectiveness outcomes in a sample of oncology patients treated for AML with Mylotarg through up to two additional relapsed/refractory (R/R)-based lines of therapy (through third-line therapy). The study will use United States oncology electronic medical record (EMR) data. All study data are secondary data and will have been collected retrospectively from existing clinical data originally collected as part of routine care.

Study Overview

• Status: Completed
• Conditions: Leukemia, Myeloid, Acute
• Intervention / Treatment: Drug: Gemtuzumab Ozogamicin

• Study Type: Observational
• Enrollment (Actual): 32

Contacts and Locations

Study Locations

• United States
  • New York
    • New York, New York, United States, 10017
      • Pfizer Investigational Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

This study will include adult patients diagnosed with AML who, at any point on or after September 1, 2017 received Mylotarg, alone or in combination with other agents for newly diagnosed or relapsed refractory AML.

Description

Inclusion Criteria:

• Confirmed diagnosis of acute myeloid leukemia (AML) on or after 01 December 2014 through Clinical Research Nurse (CRN) review of provider documentation of AML diagnosis in the medical record;
• Receipt of Mylotarg at any point during first three lines of therapy following initial AML diagnosis;
• Age greater than or equal to 18 years at initial diagnosis of AML.

Exclusion Criteria:

- Record of 1 or more of the following confounding diagnoses at any point before or after AML diagnosis: Acute lymphoblastic leukemia; acute promyelocytic leukemia, aggressive systemic mastocytosis; hypereosinophilic syndrome and/or chronic eosinophilic leukemia; dermatofibrosarcoma protuberans; gastrointestinal stromal tumors.

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Real-World Event-Free Survival (rwEFS)	rwEFS defined as time from treatment initiation date (for first line of Mylotarg-containing therapy) to date of treatment failure (TF), relapse from complete response (CR) or better, death from any cause, whichever came first. TF defined as failure to achieve CR or better following up to 3 cycles of Mylotarg. Time origin for rwEFS was start of Mylotarg in first line of therapy in which it was used. Terminal event for analysis of rwEFS was earlier of treatment failure, relapse from CR or better, death. CR is defined as having less than (<) 5% blasts in the bone marrow and 0% blasts in the peripheral blood. Real-world setting signifies participants treated in clinical practice and in a non-trial setting.	From treatment initiation date to date of TF, relapse from CR or better, death from any cause, whichever came first (maximum duration of 3 years)
Real-World Relapse Free Survival (rwRFS)	rwRFS was defined as the time from the treatment initiation date (during the first line of Mylotarg-containing therapy) to the date of a relapse event, or death from any cause, whichever came first. The time origin for rwRFS was the start of Mylotarg in the first line of therapy in which it was used. Real-world setting signifies participants treated in clinical practice and in a non-trial setting.	From the treatment initiation date (during the first line of Mylotarg-containing therapy) to the date of a relapse event, or death from any cause, whichever came first (maximum duration of 3 years)
Real-World Overall Survival (rwOS)	rwOS was defined as the time from the start of the first Mylotarg use till the date of death. Participants who were not indicated to be deceased in clinical records or Social Security Disability Insurance (SSDI) records were censored for rwOS analysis as of the later of 1) the latest date known alive within the clinical record, 2) 4 months prior to the date of most recent SSDI update. Real-world setting signifies participants treated in clinical practice and in a non-trial setting.	From the start of the first Mylotarg use till death (maximum duration of 3 years)
Number of Participants With First Positive Response	First positive response was assessed by physician as first response from any of the following: CR, partial response (PR), stable disease (SD) and progressive disease (PD). CR is defined as having < 5% blasts in the bone marrow and 0% blasts in the peripheral blood. PR is defined as having 5 to 25% bone marrow blasts with > 50% reduction in blasts and peripheral blood count recovery. SD is defined as having no change in bone marrow blasts. PD is defined as having relapse following response. Participant for whom record did not indicate one of these classification classed as not evaluable (NE).	From the first qualifying Mylotarg-containing line of therapy to the end of the third line of therapy or the end of record, whichever occurs first (maximum duration of 3 years)

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Duration of Therapy	Duration of therapy was time from the initiation of Mylotarg to the last date of Mylotarg therapy, regardless of line of therapy (duration could continue into subsequent lines of therapy), study end date, or death, whichever came first.	From the initiation of Mylotarg to the last date of Mylotarg therapy (maximum duration of 3 years)

Collaborators and Investigators

• Sponsor: Pfizer

Publications and helpful links

Helpful Links

• To obtain contact information for a study center near you, click here.

Study record dates

Study Major Dates

• Study Start (Actual): April 7, 2020
• Primary Completion (Actual): July 31, 2020
• Study Completion (Actual): July 31, 2020

Study Registration Dates

• First Submitted: April 1, 2020
• First Submitted That Met QC Criteria: April 6, 2020
• First Posted (Actual): April 7, 2020

Study Record Updates

• Last Update Posted (Actual): August 9, 2021
• Last Update Submitted That Met QC Criteria: July 16, 2021
• Last Verified: July 1, 2021

More Information

Terms related to this study

• Keywords: AML; Mylotarg; gemtuzumab
• Additional Relevant MeSH Terms: Neoplasms by Histologic Type; Neoplasms; Leukemia; Leukemia, Myeloid; Leukemia, Myeloid, Acute; Antineoplastic Agents; Antineoplastic Agents, Immunological; Gemtuzumab
• Other Study ID Numbers: B1761033

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.