# Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer

> **NCT00416715** · PHASE2 · COMPLETED · sponsor: **University of Washington** · enrollment: 100 (actual)

## Conditions studied

- Arthralgia
- Musculoskeletal Complications
- Pain
- Recurrent Breast Cancer
- Stage I Breast Cancer
- Stage II Breast Cancer
- Stage IIIA Breast Cancer
- Stage IIIB Breast Cancer
- Stage IIIC Breast Cancer

## Interventions

- **DRUG:** letrozole
- **DIETARY_SUPPLEMENT:** calcium carbonate
- **OTHER:** laboratory biomarker analysis
- **DIETARY_SUPPLEMENT:** calcium citrate
- **DIETARY_SUPPLEMENT:** calcium glucarate
- **DRUG:** calcium gluconate
- **DIETARY_SUPPLEMENT:** cholecalciferol
- **PROCEDURE:** assessment of therapy complications
- **PROCEDURE:** musculoskeletal complications management/prevention

## Key facts

- **NCT ID:** NCT00416715
- **Lead sponsor:** University of Washington
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2006-10
- **Primary completion:** 2010-05
- **Final completion:** 2010-05
- **Target enrollment:** 100 (ACTUAL)
- **Last updated:** 2017-07-11

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00416715

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00416715, "Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT00416715. Licensed CC0.

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