Impact of Radiotherapy on Survival in Breast Cancer Patients

Impact of Radiotherapy on Disease-Free and Overall Survival in Breast Cancer Patients: A Retrospective Cohort Study

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT07631962

Enrollment

1030

Registered

2026-06-08

Start date

1998-01-01

Completion date

2025-01-01

Last updated

2026-06-08

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

Conditions

Breast Cancer, Radiotherapy

Brief summary

In this study, using a large retrospective cohort, the investigators evaluate the impact of RT on disease-free survival and overall survival of patients with BC. The aim is to determine the true role of radiotherapy in improving patient outcomes and to provide a basis for designing more precise treatment strategies in the future.

Interventions

RADIATIONradiotherapy

Radiotherapy after BCS surgery in accordance to standard breast cancer guidelines

Study design

Observational model

CASE_CROSSOVER

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

FEMALE

Healthy volunteers

Inclusion criteria

-BC patients diagnosed between January 1998 and February 2008 in the Motamed Breast Cancer Research in Tehran, Iran.

Exclusion criteria

* Male patients. * Patients with missing LPFS and OS information (zero encounter/follow-up).

Design outcomes

Primary

Measure	Time frame
Survival	25 years

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 9, 2026