# Evaluating Harms and Benefits of Endocrine Therapy in Patients ≥70 Years of Age With Lower Risk Breast Cancer

> **NCT04921137** · PHASE4 · ACTIVE_NOT_RECRUITING · sponsor: **Ottawa Hospital Research Institute** · enrollment: 109 (actual)

## Conditions studied

- Breast Cancer

## Interventions

- **OTHER:** No endocrine therapy
- **OTHER:** Endocrine therapy

## Key facts

- **NCT ID:** NCT04921137
- **Lead sponsor:** Ottawa Hospital Research Institute
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2021-08-19
- **Primary completion:** 2029-02
- **Final completion:** 2029-02
- **Target enrollment:** 109 (ACTUAL)
- **Last updated:** 2025-11-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04921137

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04921137, "Evaluating Harms and Benefits of Endocrine Therapy in Patients ≥70 Years of Age With Lower Risk Breast Cancer". Retrieved via AI Analytics 2026-07-17 from https://api.ai-analytics.org/clinical/NCT04921137. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*