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NCT04195750 · OUTCOME

Change From Baseline to Week 17 in Disease Symptoms Using the FKSI-DRS Items 1-9 Score

A Study of Belzutifan (MK-6482) Versus Everolimus in Participants With Advanced Renal Cell Carcinoma (MK-6482-005) · Source last updated 2026-05-14

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

Measure
LEAST_SQUARES_MEAN
Unit
Score on a Scale
Interval / dispersion
95% Confidence Interval
Time frame
Baseline (Day 1) and week 17

What was measured

The FKSI-DRS was a questionnaire that asked the participant to rate 9 kidney cancer-related symptoms: lack of energy, fatigue, weight loss, pain, bone pain, shortness of breath, cough, fever, or blood in the urine. Each item was scored on a 5-point scale (0=not at all to 4=very much). FKSI-DRS total score ranged from 0 (most severe symptoms) to 36 (no symptoms) with a higher score indicating a better outcome. The change from baseline to Week 17 in Disease Symptoms using the FKSI-DRS Items 1-9 score was calculated based on a constrained longitudinal data analysis (cLDA) model with the PRO scores as response variable with covariates for treatment by time interaction, stratification factors (IMDC Risk Category, and Number of Prior VEGF/VEGF-Receptor Targeted Therapies for RCC) as covariates.

Analysis population: Per protocol, the analysis population consisted of all randomized participants who have received at least one dose of the study intervention and had assessments available for FKSI-DRS at baseline or post-baseline up to Week 17; and had data available for this change from baseline in disease symptoms outcome using FKSI-DRS. Per protocol, participants enrolled in the Safety Run-In were not randomized and not included in the protocol-specified analyses for any of the outcome measures.

Groups in this outcome

Belzutifan

Randomized participants received 120 mg of belzutifan orally once daily (QD), until disease progression or discontinuation.

Everolimus

Randomized participants received 10 mg of Everolimus orally QD, until disease progression or discontinuation.

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

Analysis denominator · Participants

GroupSource count
Belzutifan363
Everolimus353

Reported measurements

Source class 1
Values in Score on a Scale · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Belzutifan-0.17Not reported-0.700.36Not reported
Everolimus-1.62Not reported-2.17-1.06Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.70
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    2.19
    estimate Comment
    Based on a cLDA model with the PRO scores as the response variable with covariates for treatment by time interaction, stratification factors (IMDC Risk Category, and Number of Prior VEGF/VEGF-Receptor Targeted Therapies for RCC) as covariates.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0002
    param Type
    Difference in LS Means
    param Value
    1.45
    statistical Method
    t-test, 2 sided
Complete source fields
analyses
  1. ci Lower Limit
    0.70
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    2.19
    estimate Comment
    Based on a cLDA model with the PRO scores as the response variable with covariates for treatment by time interaction, stratification factors (IMDC Risk Category, and Number of Prior VEGF/VEGF-Receptor Targeted Therapies for RCC) as covariates.
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    OTHER
    p Value
    0.0002
    param Type
    Difference in LS Means
    param Value
    1.45
    statistical Method
    t-test, 2 sided
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        -0.70
        upper Limit
        0.36
        value
        -0.17
      2. group Id
        OG001
        lower Limit
        -2.17
        upper Limit
        -1.06
        value
        -1.62
denoms
  1. counts
    1. group Id
      OG000
      value
      363
    2. group Id
      OG001
      value
      353
    units
    Participants
description
The FKSI-DRS was a questionnaire that asked the participant to rate 9 kidney cancer-related symptoms: lack of energy, fatigue, weight loss, pain, bone pain, shortness of breath, cough, fever, or blood in the urine. Each item was scored on a 5-point scale (0=not at all to 4=very much). FKSI-DRS total score ranged from 0 (most severe symptoms) to 36 (no symptoms) with a higher score indicating a better outcome. The change from baseline to Week 17 in Disease Symptoms using the FKSI-DRS Items 1-9 score was calculated based on a constrained longitudinal data analysis (cLDA) model with the PRO scores as response variable with covariates for treatment by time interaction, stratification factors (IMDC Risk Category, and Number of Prior VEGF/VEGF-Receptor Targeted Therapies for RCC) as covariates.
dispersion Type
95% Confidence Interval
groups
  1. description
    Randomized participants received 120 mg of belzutifan orally once daily (QD), until disease progression or discontinuation.
    id
    OG000
    title
    Belzutifan
  2. description
    Randomized participants received 10 mg of Everolimus orally QD, until disease progression or discontinuation.
    id
    OG001
    title
    Everolimus
param Type
LEAST_SQUARES_MEAN
population Description
Per protocol, the analysis population consisted of all randomized participants who have received at least one dose of the study intervention and had assessments available for FKSI-DRS at baseline or post-baseline up to Week 17; and had data available for this change from baseline in disease symptoms outcome using FKSI-DRS. Per protocol, participants enrolled in the Safety Run-In were not randomized and not included in the protocol-specified analyses for any of the outcome measures.
reporting Status
POSTED
time Frame
Baseline (Day 1) and week 17
title
Change From Baseline to Week 17 in Disease Symptoms Using the FKSI-DRS Items 1-9 Score
type
SECONDARY
unit Of Measure
Score on a Scale

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