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NCT03085095 · OUTCOME

Sustained Castration Rate

A Study to Evaluate the Safety and Efficacy of Relugolix in Men With Advanced Prostate Cancer · Source last updated 2022-01-18

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

Measure
NUMBER
Unit
percentage of participants
Interval / dispersion
95% Confidence Interval
Time frame
From Week 5 Day 1 (Day 29) to Week 49 Day 1 (Day 337)

What was measured

Sustained castration rate defined as the cumulative probability of testosterone suppression to \< 50 nanogram (ng)/deciliter (dL). The rate was estimated for each treatment group using the Kaplan-Meier method and reported as percentage of participants. The lower bound of the 95% confidence interval (CI) for the cumulative probability of sustained testosterone suppression in the relugolix treatment group must have been ≥ 90% to meet evaluation criteria for efficacy.

Analysis population: All randomized participants who received at least 1 dose of study drug.

Groups in this outcome

Relugolix

Relugolix 120-mg tablet administered orally once daily for 48 weeks following an oral loading dose of 360 mg (3 x 120-mg tablets) on Day 1.

Leuprolide Acetate

Leuprolide acetate depot suspension, 22.5 mg (or 11.25 mg in Japan and Taiwan), every 3 months by subcutaneous injection.

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

Analysis denominator · Participants

GroupSource count
Relugolix622
Leuprolide Acetate308

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Relugolix96.7Not reported94.997.9Not reported
Leuprolide Acetate88.8Not reported84.691.8Not reported

Source statistical analyses

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

  1. ci Lower Limit
    4.1
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    11.8
    estimate Comment
    Treatment difference= Relugolix - Leuprolide acetate
    group Description
    Following statistical analysis of the lower bound of the 95% CI ≥ 90% for the relugolix group, secondary statistical analysis of non-inferiority was conducted.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    The lower bound of the 95% CI for the difference in the cumulative probability of sustained profound castration rate between the 2 treatment groups was calculated with a noninferiority margin of -10%.
    non Inferiority Type
    NON_INFERIORITY
    param Type
    Treatment difference
    param Value
    7.9
  2. group Description
    Following statistical analysis of the lower bound of the 95% CI ≥ 90% for the relugolix group, secondary statistical analysis of superiority was conducted.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    If non-inferiority was demonstrated, superiority could be claimed if the lower bound of the 95% CI for the difference in the cumulative probability of sustained profound castration rate between the 2 treatment groups also excluded 0%. The p value was calculated post hoc.
    non Inferiority Type
    SUPERIORITY
    p Value
    < 0.0001
    statistical Comment
    Two-sided type I error of 0.05.
    statistical Method
    t-test, 2 sided
Complete source fields
analyses
  1. ci Lower Limit
    4.1
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    11.8
    estimate Comment
    Treatment difference= Relugolix - Leuprolide acetate
    group Description
    Following statistical analysis of the lower bound of the 95% CI ≥ 90% for the relugolix group, secondary statistical analysis of non-inferiority was conducted.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    The lower bound of the 95% CI for the difference in the cumulative probability of sustained profound castration rate between the 2 treatment groups was calculated with a noninferiority margin of -10%.
    non Inferiority Type
    NON_INFERIORITY
    param Type
    Treatment difference
    param Value
    7.9
  2. group Description
    Following statistical analysis of the lower bound of the 95% CI ≥ 90% for the relugolix group, secondary statistical analysis of superiority was conducted.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Comment
    If non-inferiority was demonstrated, superiority could be claimed if the lower bound of the 95% CI for the difference in the cumulative probability of sustained profound castration rate between the 2 treatment groups also excluded 0%. The p value was calculated post hoc.
    non Inferiority Type
    SUPERIORITY
    p Value
    < 0.0001
    statistical Comment
    Two-sided type I error of 0.05.
    statistical Method
    t-test, 2 sided
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        94.9
        upper Limit
        97.9
        value
        96.7
      2. group Id
        OG001
        lower Limit
        84.6
        upper Limit
        91.8
        value
        88.8
denoms
  1. counts
    1. group Id
      OG000
      value
      622
    2. group Id
      OG001
      value
      308
    units
    Participants
description
Sustained castration rate defined as the cumulative probability of testosterone suppression to \< 50 nanogram (ng)/deciliter (dL). The rate was estimated for each treatment group using the Kaplan-Meier method and reported as percentage of participants. The lower bound of the 95% confidence interval (CI) for the cumulative probability of sustained testosterone suppression in the relugolix treatment group must have been ≥ 90% to meet evaluation criteria for efficacy.
dispersion Type
95% Confidence Interval
groups
  1. description
    Relugolix 120-mg tablet administered orally once daily for 48 weeks following an oral loading dose of 360 mg (3 x 120-mg tablets) on Day 1.
    id
    OG000
    title
    Relugolix
  2. description
    Leuprolide acetate depot suspension, 22.5 mg (or 11.25 mg in Japan and Taiwan), every 3 months by subcutaneous injection.
    id
    OG001
    title
    Leuprolide Acetate
param Type
NUMBER
population Description
All randomized participants who received at least 1 dose of study drug.
reporting Status
POSTED
time Frame
From Week 5 Day 1 (Day 29) to Week 49 Day 1 (Day 337)
title
Sustained Castration Rate
type
PRIMARY
unit Of Measure
percentage of participants

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Preserved source evidence · Not medical advice