ETERNITY: Long-term Safety and Efficacy of GBG Study Participants

Sponsor

German Breast Group (Other)

Overall Status

Recruiting

CT.gov ID

NCT05739591

Collaborator

(none)

400

Enrollment

Locations

91.2

Anticipated Duration (Months)

133.3

Patients Per Site

1.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The ETERNITY study is an international, multicenter, observational study that aims to follow up patients who have participated in a GBG trial for early breast cancer, even after the study has officially ended, in order to collect long-term data on survival, late or delayed adverse events, in addition to information related to pregnancy, fertility and other parameters impacting quality of life.

Condition or Disease	Intervention/Treatment	Phase
Breast Cancer

Detailed Description

This is a prospective and retrospective, international, multicenter, non-interventional, observational study for collection of long-term safety and efficacy parameters of former GBG study participants of prospective clinical trials on early breast cancer.

Patients with prospective data collection will be informed about the registry by the treating physician at the study site. After written informed consent (which may already be included in the main and/or biomaterial informed consent form of the respective clinical study) for data and biomaterial collection, the registration form will be filled out completely within the GBG electronic data capture system (MEDCODES®). Inclusion and registration can take place after informed consent of the patient. However, documentation of follow-up should start after the regular end of study or with the start of the follow-up period, as defined in the respective study protocol.

A correlation of the follow-up registry database with the respective study databases is possible via the patient identification number of the participant. Consequently, the long-term effects of the study therapy can be calculated per therapy group, and the effectiveness can be correlated with possible late-onset toxicities.

Post-study long-term outcome follow-up will be assessed according to local/national guidelines for standard follow-up examinations and post-treatment surveillance. Data should be documented at least once a year in the registry.

Relapse and safety assessment will be performed, and survival status will be collected in all registered patients. Here, the investigator may conduct evaluations or assessments within regular follow-up visits. However, telephone contact or contact in writing with the patient or treating physician or relatives in case of death is also acceptable. Imaging tests (e.g., mammography and/or staging workup) are recommended according to local/national guidelines for follow-up and in case of symptoms suspicious for locoregional or distant relapse.

Information to be collected include:

Date and site of first non-invasive local recurrence, first invasive local recurrence, first contralateral breast recurrence, first regional recurrence, first distant recurrence
Date and diagnosis of secondary malignancies
Date and cause of deaths
Pregnancies after study participation and their respective outcome
Anti-hormonal therapies in HR+ breast cancer patients
Further anti-cancer treatments after study participation
Long-term adverse drug reactions of the respective study treatments

In case of disease recurrence, it is recommended to confirm diagnosis by histological examination. If performed, an FFPE tumor tissue block from the metastatic lesion should be provided to GBG.

It is allowed and recommended to register patients in parallel in the GBG self-reporting registry (available only in German) that will allow follow-up and long-term efficacy evaluations beyond the end of the respective study by the patients themselves.

STATISTICS

This is an observational study for collection of long-term safety and efficacy parameters of former GBG study participants. As long-term outcomes and late-onset toxicities are also secondary objectives in all prospective clinical studies of the GBG, statistical methods will adhere as much as possible to methods described in the respective clinical trial protocols.

For the analysis, data from the corresponding clinical trials (e.g., baseline characteristics, short-time efficacy, and toxicity parameters, already collected follow-up data, etc.) will be merged with the registry data.

DATA HANDLING, MANAGEMENT AND QUALITY ASSURANCE

The GBG EDC system MEDCODES® will be maintained by GBG Forschungs GmbH for all study sites.

Data management, which comprises CRF design, database and application hosting, data entry, and data validation, will be performed by GBG Forschungs GmbH for all study sites. GBG Forschungs GmbH will provide the investigator site with the web base EDC system MEDCODES® that is validated and conforms to 21 CFR Part 11 requirements. Investigator site staff will not be given access to MEDCODES® until they have been trained on the EDC system.

Visual and computerized methods of data validation are applied in order to ensure accurate, consistent, and reliable data for the subsequent analyses.

All communication between MedCODES® and the clients is securely encrypted (Secure HTTP).

In order to protect patient confidentiality, each participating patient is assigned a unique GBG patient identification number. Instead of the true patient identity, the pseudonym is used in all communication between the trial site and the GBG Forschungs GmbH. A correlation of the follow-up registry database with the respective study databases is possible via the patient identification number of the participant.

Every user is provided with a unique username and a unique password. Every user is assigned to a user group which represents their role in the CRF workflow. Access control is based on user name, group. Therefore, users can only access those datasets necessary for them to fulfill their role in the CRF workflow ("need to know basis").

Study Design

Study Type:

Observational [Patient Registry]

Anticipated Enrollment :

400 participants

Observational Model:

Cohort

Time Perspective:

Prospective

Official Title:

Registry for Long-term Follow-up of Safety and Efficacy Parameters of GBG Study Participants

Actual Study Start Date :

Oct 12, 2022

Anticipated Primary Completion Date :

May 19, 2030

Anticipated Study Completion Date :

May 19, 2030

Outcome Measures

Primary Outcome Measures

Disease-free survival (DFS) [10 years]
Time period between randomization and first event (ipsi- or contralateral (non-) in-breast or loco-regional recurrence, distant recurrence, death from breast cancer, death from non-breast cancer cause, death from unknown cause, invasive contralateral breast cancer, second primary invasive cancer (non-breast))
Invasive disease-free survival (iDFS) [10 years]
Time period between randomization and first event (ipsi- or contralateral invasive in-breast or loco-regional recurrence, distant recurrence, death from breast cancer, death from non-breast cancer cause, death from unknown cause, invasive contralateral breast cancer, second primary invasive cancer (non-breast))
Distant disease-free survival (DDFS) [10 years]
Time period between randomization and diagnosis of any distant recurrence of disease, any second primary invasive cancer (non-breast) or death due to any cause, whichever occurs first
Locoregional recurrence-free survival (LRRFS) [10 years]
Time period between randomization and diagnosis of any loco-regional (ipsilateral breast (invasive or DCIS), local/regional lymph nodes) recurrence of disease, any invasive contralateral breast cancer or death due to any cause, whichever occurs first
Overall survival (OS) [10 years]
Time period between randomization and death of any cause
Other primary outcome measures [10 years]
Other study-specific long-term survival endpoints may be defined in the respective study protocol or statistical analysis plan (SAP)

Secondary Outcome Measures

Long-term toxicity [10 years]
Frequency and severity of long-term toxicity associated with study treatment are graded by the current NCI Common Terminology Criteria for Adverse Events version (NCI-CTCAE) or according to the respective study protocol or statistical analysis plan (SAP)
Anti-cancer therapies [10 years]
Anti-cancer therapies including anti-hormonal therapy in hormone receptor positive (HR+) breast cancer after study participation are analyzed descriptively
Pregnancies [10 years]
Pregnancies after study participation and their outcome are analyzed descriptively.
Impact of study treatment on Quality of Life (QoL) [10 years]
In this registry, two questions on content on quality of life and degree of bother by side-effects are used

Other Outcome Measures

Explorative translational research endpoints [10 years]
Correlation of explorative biomarkers with survival and toxicity endpoints. Details are defined in the corresponding SAP

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion criteria:

Participation and treatment in a GBG clinical trial for early breast cancer.
Prospective registration: Written informed consent according to local regulatory requirements prior to data and biomaterial collection.

Exclusion criteria:

Participation and treatment in a non-GBG clinical trial for early breast cancer.
Patients with advanced or metastatic breast cancer who have participated and received treatment in a GBG clinical trial.

Contacts and Locations

Locations

	Site	City	Country	Postal Code
1	MUI - Univ. Klinik f. Frauenheilkunde Innsbruck	Innsbruck	Austria	6020
2	Ordensklinikum Linz GmbH - BHS	Linz	Austria	4020
3	LKH Salzburg - PMU	Salzburg	Austria	5020