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NCT00553410 · OUTCOME

Distant Recurrence-free Interval (DRFI)

Letrozole in Preventing Cancer in Postmenopausal Women Who Have Received 4-6 Years of Hormone Therapy for Hormone Receptor-Positive, Lymph Node-Positive, Early-Stage Breast Cancer · Source last updated 2026-09-01

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

Measure
NUMBER
Unit
percentage of patients
Interval / dispersion
95% Confidence Interval
Time frame
5-year estimates, reported at a median follow-up of 60 months

What was measured

Duration of time from randomization to the first indication of invasive breast recurrence at a distant site. In the absence of an event, DRFI was censored at the date of last follow-up visit or date or death without distant recurrence.\* \*This endpoint replaced DDFS, which was specified in the protocol

Analysis population: Intention-to-treat

Groups in this outcome

Arm A: Continuous Letrozole

Continuous letrozole: 5 years continuously (2.5 mg Letrozole daily) Letrozole: Film-coated tablet, oral use, 2.5 mg Letrozole daily for 5 years continuously

Arm B: Intermittent Letrozole

Intermittent letrozole: 48 months over 5 yrs: 4 x 9 months (9 mo followed by 3 mo treatment-free interval in yrs 1-4, -\> 36 mo) plus 1 x 12 mo in yr 5 -\> 48 months Letrozole: Film-coated tablet, oral use, 2.5 mg daily, 48 months over 5 yrs: 4 x 9 months (9 mo followed by 3 mo treatment-free interval in yrs 1-4, -\> 36 mo) plus 1 x 12 mo in yr 5 -\> 48 months

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

Analysis denominator · Participants

GroupSource count
Arm A: Continuous Letrozole2426
Arm B: Intermittent Letrozole2425

Reported measurements

Source class 1
Values in percentage of patients · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Arm A: Continuous Letrozole92.5Not reported91.393.5Not reported
Arm B: Intermittent Letrozole93.2Not reported9294.2Not reported

Source statistical analyses

Group order, estimate direction, methods and comments are retained. No treatment ranking is inferred.

  1. ci Lower Limit
    .71
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.09
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    .25
    param Type
    Hazard Ratio (HR)
    param Value
    .88
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    .71
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    1.09
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    .25
    param Type
    Hazard Ratio (HR)
    param Value
    .88
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        91.3
        upper Limit
        93.5
        value
        92.5
      2. group Id
        OG001
        lower Limit
        92
        upper Limit
        94.2
        value
        93.2
denoms
  1. counts
    1. group Id
      OG000
      value
      2426
    2. group Id
      OG001
      value
      2425
    units
    Participants
description
Duration of time from randomization to the first indication of invasive breast recurrence at a distant site. In the absence of an event, DRFI was censored at the date of last follow-up visit or date or death without distant recurrence.\* \*This endpoint replaced DDFS, which was specified in the protocol
dispersion Type
95% Confidence Interval
groups
  1. description
    Continuous letrozole: 5 years continuously (2.5 mg Letrozole daily) Letrozole: Film-coated tablet, oral use, 2.5 mg Letrozole daily for 5 years continuously
    id
    OG000
    title
    Arm A: Continuous Letrozole
  2. description
    Intermittent letrozole: 48 months over 5 yrs: 4 x 9 months (9 mo followed by 3 mo treatment-free interval in yrs 1-4, -\> 36 mo) plus 1 x 12 mo in yr 5 -\> 48 months Letrozole: Film-coated tablet, oral use, 2.5 mg daily, 48 months over 5 yrs: 4 x 9 months (9 mo followed by 3 mo treatment-free interval in yrs 1-4, -\> 36 mo) plus 1 x 12 mo in yr 5 -\> 48 months
    id
    OG001
    title
    Arm B: Intermittent Letrozole
param Type
NUMBER
population Description
Intention-to-treat
reporting Status
POSTED
time Frame
5-year estimates, reported at a median follow-up of 60 months
title
Distant Recurrence-free Interval (DRFI)
type
SECONDARY
unit Of Measure
percentage of patients

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

Preserved source evidence · Not medical advice