# Study of Changes in Estrogen Levels and Grip Strength in Postmenopausal Women Who Have Received 4 to 6 Years of Hormone Therapy for Breast Cancer and Are Currently Receiving Letrozole on Clinical Trial IBCSG-35-07

> **NCT01281137** · — · COMPLETED · sponsor: **ETOP IBCSG Partners Foundation** · enrollment: 104 (actual)

## Conditions studied

- Breast Cancer

## Interventions

- **GENETIC:** polymorphism analysis
- **OTHER:** laboratory biomarker analysis
- **PROCEDURE:** quality-of-life assessment

## Key facts

- **NCT ID:** NCT01281137
- **Lead sponsor:** ETOP IBCSG Partners Foundation
- **Sponsor class:** NETWORK
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2011-01
- **Primary completion:** 2019-05-15
- **Final completion:** 2019-05-15
- **Target enrollment:** 104 (ACTUAL)
- **Last updated:** 2021-10-06


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01281137

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01281137, "Study of Changes in Estrogen Levels and Grip Strength in Postmenopausal Women Who Have Received 4 to 6 Years of Hormone Therapy for Breast Cancer and Are Currently Receiving Letrozole on Clinical Trial IBCSG-35-07". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT01281137. Licensed CC0.

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