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This dataset is available to Authorized Users of the Project Data Sphere Cancer Research Platform through an initiative with the National Cancer Institute (NCI) of the U.S. National Institutes of Health (NIH). To gain access to this dataset, you must complete the following steps:

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Breast

A Double Blind Randomization to Letrozole or Placebo for Women Previously Diagnosed With Primary Breast Cancer Completing Five Years of Adjuvant Aromatase Inhibitor Either as Initial Therapy or After Tamoxifen (Including Those in The MA.17 Study)

Unique Dataset IDnci-data-71
DownloadableNo
SponsorCanadian Cancer Trials GroupData ProviderNational Cancer InstituteTotal Study Enrolled Patients1913RandomizationYesPubMed (PMID)27264120.00ClinicalTrial.gov IDNCT00754845ClinicalTrial.gov URLhttps://clinicaltrials.gov/ct2/show/NCT00754845
Study PhaseClinical Study Phase IIIBlinding MethodOtherType(s) of dataN/AIntervention TypeDrug, PlaceboDataset TypeOther

NCI Description

This dataset will allow users to reproduce the treatment comparison between letrozole group and the placebo group in trial NCT00754845.

Clinical Trial Title

A Double Blind Randomization to Letrozole or Placebo for Women Previously Diagnosed With Primary Breast Cancer Completing Five Years of Adjuvant Aromatase Inhibitor Either as Initial Therapy or After Tamoxifen (Including Those in The MA.17 Study)

Trial Summary and Conditions

RATIONALE: Estrogen can cause the growth of breast cancer cells. Hormone therapy using letrozole may fight breast cancer by lowering the amount of estrogen the body makes. It is not yet known whether letrozole is more effective than a placebo in treating in women with breast cancer who have already received 5 years of aromatase inhibitor therapy. PURPOSE: This randomized phase III trial is studying letrozole to see how well it works compared with a placebo in treating women with primary breast cancer who have received 5 years of aromatase inhibitor therapy.

Data Summary

See data dictionary for more details.

Study Objectives

OBJECTIVES: Primary To compare the disease-free survival of women with primary breast cancer treated with letrozole vs placebo after completing approximately 5 years (i.e., 4? - 6 years) of aromatase inhibitor therapy (e.g., letrozole, anastrozole, or exemestane). Secondary To compare the effect of these drugs on overall (all cause specific) mortality of these patients. To compare the incidence of contralateral breast cancer in patients treated with these drugs. To evaluate the long-term clinical and laboratory safety of aromatase inhibitor therapy, particularly cardiovascular morbidity and mortality (e.g., significant coronary artery disease, including myocardial infarction and angina requiring percutaneous transluminal coronary angioplasty or coronary artery bypass graft, fatal and nonfatal strokes, and all vascular deaths); incidence of all bone fractures (with particular emphasis on hip and wrist fractures as indicators of osteoporosis); changes in bone density; and common toxicities. To compare overall quality of life (QOL) and menopausal-specific QOL of patients treated with these drugs. OUTLINE: This is a multicenter study. Patients are stratified according to lymph node status at diagnosis (negative vs positive vs unknown), prior adjuvant chemotherapy (yes vs no), interval between last dose of aromatase inhibitor therapy and study randomization (< 6 months vs 6 months to 2 years), and duration of prior tamoxifen citrate use (0 vs < 2 years vs 2 - 4? years vs > 4? years). Patients are randomized to 1 of 2 treatment arms. Arm I: Patients receive oral letrozole once daily for up to 5 years in the absence of unacceptable toxicity, disease recurrence, or development of a second malignancy. Arm II: Patients receive oral placebo once daily for up to 5 years in the absence of unacceptable toxicity, disease recurrence, or development of a second malignancy.

Outcome Measures

Primary: Disease-free Survival (DFS) [ Time Frame: Unitil the end of study with a median follow up of 75 months ] Secondary: Incidence of Contralateral Breast Cancer [ Time Frame: 10 years ] Overall Survival (OS) [ Time Frame: Until the end of study with a median follow-up of 75 months ] Change From Baseline in Role Function- Physical Scale on SF(Short Form)-36 Health Survey [ Time Frame: 8 years ]

ClinicalTrial.gov

Below are the clinical trial(s) associated with this dataset (all links are to ClinicalTrials.Gov):

Available Downloads:

To gain access to the data and analytic tools click here.

Data Dictionary: NCT00754845-D1-Data-Dictionary.pdf

DATA: NCT00754845-D1-Dataset.csv

OTHER: README.pdf