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NCT01602380 · OUTCOME

Duration of Response (DoR) for Fulvestrant Treatment Versus Anastrozole Treatment

A Global Study to Compare the Effects of Fulvestrant and Arimidex in a Subset of Patients With Breast Cancer. · Source last updated 2026-02-27

Results reported by the registry submitting party. Population, time horizon, units and missing values must be read together.

Measure
MEDIAN
Unit
Months
Interval / dispersion
Inter-Quartile Range
Time frame
Baseline RECIST 1.1 assessments (Day 0) and then every 12 weeks until disease progression or treatment discontinuation (up to approximately 38 months)

What was measured

DoR was defined only for patients who had an objective response, as the time in days from date of first documentation of response (CR/PR) until date of disease progression. CR was disappearance of all target lesions since baseline; any pathological lymph nodes selected as TL to have a reduction in short axis to \<10 mm. At least a 30% decrease in the sum of the diameters of TL, taking as reference the baseline sum of diameters.

Analysis population: Only patients in the ITT analysis set (which included all randomised patients), who also had an objective response and had measurable disease at baseline were included in the DoR analysis (n=89 for Fulvestrant arm and n=88 for Anastrozole arm).

Groups in this outcome

Fulvestrant 500 mg

Patients received fulvestrant (Faslodex™) 500 mg, administered as two 5 mL intramuscular injections, 1 in each buttock, at each visit on Days 0, 14 (±3), 28 (±3) and every 28 (±3) days thereafter. In order to support the double-blind, double-dummy design of the trial, each patient randomised to receive fulvestrant, also received placebo to match the anastrozole schedule (tablets, once daily).

Anastrozole 1 mg

Patients received anastrozole (Arimidex™), administered orally as a single tablet at a dose of 1 mg/day from randomisation on Day 0 and once daily thereafter. In order to support the double-blind, double-dummy design of the trial, each patient randomised to receive anastrozole also received placebo to match the fulvestrant schedule (injections on Days 0, 14 \[±3\], 28 \[±3\] and every 28 \[±3\] days thereafter).

Group identifiers and denominators belong to this outcome only. They may differ in another outcome or in safety reporting.

Analysis denominator · Participants

GroupSource count
Fulvestrant 500 mg89
Anastrozole 1 mg88

Reported measurements

Source class 1
Values in Months · Interval/dispersion: Inter-Quartile Range
GroupValueSpreadLowerUpperComment
Fulvestrant 500 mg20.0Not reported10.6NANA = Not Available. 75th percentile value not calculable due to insufficient data.
Anastrozole 1 mg13.2Not reported8.324.7Not reported
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        NA = Not Available. 75th percentile value not calculable due to insufficient data.
        group Id
        OG000
        lower Limit
        10.6
        upper Limit
        NA
        value
        20.0
      2. group Id
        OG001
        lower Limit
        8.3
        upper Limit
        24.7
        value
        13.2
denoms
  1. counts
    1. group Id
      OG000
      value
      89
    2. group Id
      OG001
      value
      88
    units
    Participants
description
DoR was defined only for patients who had an objective response, as the time in days from date of first documentation of response (CR/PR) until date of disease progression. CR was disappearance of all target lesions since baseline; any pathological lymph nodes selected as TL to have a reduction in short axis to \<10 mm. At least a 30% decrease in the sum of the diameters of TL, taking as reference the baseline sum of diameters.
dispersion Type
Inter-Quartile Range
groups
  1. description
    Patients received fulvestrant (Faslodex™) 500 mg, administered as two 5 mL intramuscular injections, 1 in each buttock, at each visit on Days 0, 14 (±3), 28 (±3) and every 28 (±3) days thereafter. In order to support the double-blind, double-dummy design of the trial, each patient randomised to receive fulvestrant, also received placebo to match the anastrozole schedule (tablets, once daily).
    id
    OG000
    title
    Fulvestrant 500 mg
  2. description
    Patients received anastrozole (Arimidex™), administered orally as a single tablet at a dose of 1 mg/day from randomisation on Day 0 and once daily thereafter. In order to support the double-blind, double-dummy design of the trial, each patient randomised to receive anastrozole also received placebo to match the fulvestrant schedule (injections on Days 0, 14 \[±3\], 28 \[±3\] and every 28 \[±3\] days thereafter).
    id
    OG001
    title
    Anastrozole 1 mg
param Type
MEDIAN
population Description
Only patients in the ITT analysis set (which included all randomised patients), who also had an objective response and had measurable disease at baseline were included in the DoR analysis (n=89 for Fulvestrant arm and n=88 for Anastrozole arm).
reporting Status
POSTED
time Frame
Baseline RECIST 1.1 assessments (Day 0) and then every 12 weeks until disease progression or treatment discontinuation (up to approximately 38 months)
title
Duration of Response (DoR) for Fulvestrant Treatment Versus Anastrozole Treatment
type
SECONDARY
unit Of Measure
Months

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice