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NCT01946204 · OUTCOME

Progression-free Survival (PFS)

A Study of Apalutamide (ARN-509) in Men With Non-Metastatic Castration-Resistant Prostate Cancer · Source last updated 2026-08-31

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

Measure
MEDIAN
Unit
Months
Interval / dispersion
95% Confidence Interval
Time frame
Up to approximately 43 Months

What was measured

PFS defined as time from randomization to first documentation of BICR-confirmed radiographic progressive disease (PD) (development of distant/local/regional metastasis)/death due to any cause whichever occurred first. PFS data for participants without loco-regional disease were performed for US/ex-US regulatory purposes. Radiographic scans (bone scans and CT/MRI of chest,abdomen,pelvis) performed for detection of metastasis throughout study. PD based on RECIST v1.1; Subjects with one measurable lesion, At least 20% increase in sum of diameters of target lesions taking as reference smallest sum on study. In addition, sum must demonstrate an absolute increase of at least 5 millimeter(mm). Also, appearance of one/more new lesions was also considered PD. Subjects with non-measurable disease as per CT/MRI scans, unequivocal progression/appearance of one or more new lesions was considered PD. For new bone lesions detected on bone scans, second imaging (CT/MRI) was required to confirm PD.

Analysis population: ITT population included all participants who were randomized into the study, with study drug assignments designated according to initial randomization, regardless of whether participants received what was assigned.

Groups in this outcome

Placebo

Participants received apalutamide matched placebo tablets orally on a continuous once daily dosing regimen along with androgen deprivation therapy (ADT) until disease progression, withdrawal of consent or unacceptable toxicity or death.

Apalutamide

Participants received apalutamide orally at a starting dose of 240 milligram (mg) (8 x 30 mg capsules then 4 x 60 mg tablets) in a continuous treatment cycles (each treatment cycle is of 28 days) once daily dosing regimen along with androgen deprivation therapy (ADT) until disease progression, withdrawal of consent or unacceptable toxicity or death.

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

Analysis denominator · Participants

GroupSource count
Placebo401
Apalutamide806

Reported measurements

US Regulatory
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Placebo14.72Not reported14.4918.37Not reported
Apalutamide40.51Not reportedNANANA signifies: lower and upper limit of CI was not estimable (NA) as lower, or upper, or both limits of CI for survivor function were above 0.5 using log(-log) transformation (default of SAS Proc Lifetest).
EX-US Regulatory
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Placebo14.65Not reported11.2717.97Not reported
Apalutamide40.51Not reported29.4040.51Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.238
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.356
    group Description
    Statistical Analysis for PFS by BICR (US Regulatory)
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.291
    statistical Method
    Log Rank
  2. ci Lower Limit
    0.247
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.364
    group Description
    Statistical Analysis for PFS by BICR (EX-US Regulatory)
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.300
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.238
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.356
    group Description
    Statistical Analysis for PFS by BICR (US Regulatory)
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.291
    statistical Method
    Log Rank
  2. ci Lower Limit
    0.247
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.364
    group Description
    Statistical Analysis for PFS by BICR (EX-US Regulatory)
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.300
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        14.49
        upper Limit
        18.37
        value
        14.72
      2. comment
        NA signifies: lower and upper limit of CI was not estimable (NA) as lower, or upper, or both limits of CI for survivor function were above 0.5 using log(-log) transformation (default of SAS Proc Lifetest).
        group Id
        OG001
        lower Limit
        NA
        upper Limit
        NA
        value
        40.51
    title
    US Regulatory
  2. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        11.27
        upper Limit
        17.97
        value
        14.65
      2. group Id
        OG001
        lower Limit
        29.40
        upper Limit
        40.51
        value
        40.51
    title
    EX-US Regulatory
denoms
  1. counts
    1. group Id
      OG000
      value
      401
    2. group Id
      OG001
      value
      806
    units
    Participants
description
PFS defined as time from randomization to first documentation of BICR-confirmed radiographic progressive disease (PD) (development of distant/local/regional metastasis)/death due to any cause whichever occurred first. PFS data for participants without loco-regional disease were performed for US/ex-US regulatory purposes. Radiographic scans (bone scans and CT/MRI of chest,abdomen,pelvis) performed for detection of metastasis throughout study. PD based on RECIST v1.1; Subjects with one measurable lesion, At least 20% increase in sum of diameters of target lesions taking as reference smallest sum on study. In addition, sum must demonstrate an absolute increase of at least 5 millimeter(mm). Also, appearance of one/more new lesions was also considered PD. Subjects with non-measurable disease as per CT/MRI scans, unequivocal progression/appearance of one or more new lesions was considered PD. For new bone lesions detected on bone scans, second imaging (CT/MRI) was required to confirm PD.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants received apalutamide matched placebo tablets orally on a continuous once daily dosing regimen along with androgen deprivation therapy (ADT) until disease progression, withdrawal of consent or unacceptable toxicity or death.
    id
    OG000
    title
    Placebo
  2. description
    Participants received apalutamide orally at a starting dose of 240 milligram (mg) (8 x 30 mg capsules then 4 x 60 mg tablets) in a continuous treatment cycles (each treatment cycle is of 28 days) once daily dosing regimen along with androgen deprivation therapy (ADT) until disease progression, withdrawal of consent or unacceptable toxicity or death.
    id
    OG001
    title
    Apalutamide
param Type
MEDIAN
population Description
ITT population included all participants who were randomized into the study, with study drug assignments designated according to initial randomization, regardless of whether participants received what was assigned.
reporting Status
POSTED
time Frame
Up to approximately 43 Months
title
Progression-free Survival (PFS)
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice