Real World Study of Biosimilar Trastuzumab in Her2 Positive Breast Cancer
- Conditions
- Breast Cancer
- Registration Number
- NCT03892655
- Lead Sponsor
- Libbs Farmacêutica LTDA
- Brief Summary
Zedora registration was based on studies of women with metastatic breast cancer, but its approval includes adjuvant treatment. Thus, prospective data of drug use in localized disease are lacking, as well as are real-world safety and efficacy data, taking into consideration comorbidities and compliance difficulties.
This will be an observational study of patients receiving adjuvant Zedora at several Brazilian institutions for the purpose of describing its efficacy and safety.
- Detailed Description
An observational, multicenter, prospective, real-world study at Brazilian institutions.
Adult patients with early HER2+ breast cancer receiving adjuvant biosimilar trastuzumab (Zedora) at the participating sites after the start of the study and meeting the eligibility criteria will be invited to participate. Demographics, comorbidities, disease history, extent of exposure to biosimilar trastuzumab (Zedora), adverse events and LVEF values will be collected.
Data collection will be performed using a case report form (CRF) specifically designed for the study.
Study Treatment:
Biosimilar trastuzumab (Zedora) must be prescribed at the dosage described in the product label.
Treatment duration will be 12 months for patients starting upfront with biosimilar trastuzumab (Zedora). Patients switching at any time to biosimilar trastuzumab (Zedora) after a period of adjuvant or neoadjuvant Herceptin® use will also be included in the overall analysis and subsequently assessed in a subgroup analysis.
Sample Size:
Number of patients = 170 Given the inexistence of a specific hypothesis to be tested, the statistical analysis will be basically descriptive.
Sample size is based on the two-sided 95% confidence interval (95% CI) for the invasive disease relapse-free survival rate.
The table below shows the 95% CIs for different rates in a sample of 170 patients, with an interval size ranging between 9% and 15%.
Based on literature, a 3-year relapse-free survival between 88 and 96% is expected. According to the table above, a sample of 170 patients allows assessing this endpoint with +/- 6.0% accuracy.
Study duration:
The estimated time for patient enrollment in the study is one year and may be extended in case the sample size is not reached in this period. Biosimilar trastuzumab (Zedora) must be prescribed according to the product label and treatment duration will be up to one year. The patient will be maintained in the study for 5 years (from start of treatment), unless there is tumor recurrence (local or distant).
Recruitment & Eligibility
- Status
- ACTIVE_NOT_RECRUITING
- Sex
- Female
- Target Recruitment
- 170
- female patients aged 18 years and over
- diagnosis of early stage I to III breast cancer confirmed by histopathology test according to local guidelines.
- human epidermal growth factor receptor 2 (HER2)-positive tumor by immunohistochemistry or FISH (Fluorescence In Situ Hybridization), as per the 2018 ASCO assessment guideline [J Clin Oncol 36:2105, 2018].
- use of at least one dose of biosimilar trastuzumab (Zedora) as adjuvant therapy, regardless of previous neoadjuvant trastuzumab or Zedora use or the type of chemotherapy combined with the antibody.
- Signing of the informed consent form (ICF).
- use of biosimilar trastuzumab (Zedora) differently from the provisions in the label.
- patients enrolled in and followed up by Programa Vida Plena [Full Life Program].
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Safety endpoints: Incidence of Related Adverse Events 5 years Incidence of Related Adverse Events
Safety endpoints: Incidence of dose interruption 5 years Incidence of dose interruption
Efficacy endpoints: Invasive disease relapse-free survival rate 36 months Invasive disease relapse-free survival rate
Efficacy endpoints: Invasive disease relapse-free survival after curative-intent surgery 5 years Invasive disease relapse-free survival after curative-intent surgery
Efficacy endpoints: Overall survival after curative intent surgery 5 years Overall survival after curative intent surgery
Safety endpoints: Total cycles per patient 5 years Total cycles per patient
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (22)
Ruffo de Freitas Junior
🇧🇷Goiânia, Goiás, Brazil
Kaique Almeida
🇧🇷São Paulo, Brazil
Mariana Scaranti
🇧🇷São Paulo, Brazil
Sâmio Pimentel Ferreira
🇧🇷Belém, Pará, Brazil
Daniel Grabarz
🇧🇷Mogi Das Cruzes, São Paulo, Brazil
Karina Costa Maia Vianna
🇧🇷Curitiba, Paraná, Brazil
Mateus Bongers Alessandretti
🇧🇷Porto Alegre, Rio Grande Do Sul, Brazil
Luis Eduardo Rosa Zucca
🇧🇷Três Lagoas, Mato Grosso Do Sul, Brazil
Rafaela Kirchner Piccoli
🇧🇷Ijuí, Rio Grande Do Sul, Brazil
Tomas Reinert
🇧🇷Caxias Do Sul, Rio Grande Do Sul, Brazil
Márcia Cristina Colares Régis de Araújo
🇧🇷Fortaleza, Ceará, Brazil
William Hiromi Fuzita
🇧🇷Manaus, Amazonas, Brazil
Daniel Fontes Santos de Teive e Argolo
🇧🇷Salvador, Bahia, Brazil
Raphael Luzorio Fernandes
🇧🇷Cachoeiro De Itapemirim, Espírito Santo, Brazil
Sabina Bandeira Aleixo
🇧🇷Cachoeiro De Itapemirim, Espírito Santo, Brazil
Cristina de Deus Anjos Tavares Sampaio
🇧🇷Campo Grande, Mato Grosso, Brazil
Micheline Campos Rezende
🇧🇷Muriaé, Minas Gerais, Brazil
Sérgio Lunardon Padilha
🇧🇷Curitiba, Paraná, Brazil
Cláudio Rocha
🇧🇷Teresina, Piaui, Brazil
Danielli de Almeida Matias
🇧🇷Natal, Rio Grande Do Norte, Brazil
Charles Alain Cordova Pinto
🇧🇷Lages, Santa Catarina, Brazil
Monique Celeste Tavares
🇧🇷São Paulo, Brazil