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NCT04211337 · OUTCOME

Progression Free Survival (PFS) by Blinded Independent Central Review (BICR)

A Study of Selpercatinib (LY3527723) in Participants With RET-Mutant Medullary Thyroid Cancer · Source last updated 2026-03-19

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
Baseline to Progressive Disease or Death from Any Cause, Whichever Occurs First, Up to 39 Months

What was measured

PFS is defined as the time from randomization until the occurrence of documented disease progression by the BICR, per Response Evaluation Criteria in Solid Tumors (RECIST 1.1) criteria, or death from any cause in the absence of BICR-documented progressive disease. Progressive Disease (PD) was at least a 20% increase in the sum of the diameters of target lesions, with reference being the smallest sum and an absolute increase of at least 5 mm, or unequivocal progression of non-target lesions, or 1 or more new lesions.

Analysis population: All randomized participants, even if a participant did not take the assigned treatment, did not receive the correct treatment, or otherwise did not follow the protocol. Censored participants: Selpercatinib - 167; Cabozantinib or Vandetanib - 66

Groups in this outcome

Selpercatinib (TRT A)

160 milligrams Selpercatinib administered orally (PO) twice daily (BID). Adolescent Dose: 92 mg/m2 BID (not to exceed 160 mg BID).

Cabozantinib or Vandetanib (TRT B)

140 mg Cabozantinib administered orally daily (QD) or 300 mg Vandetanib administered orally QD per physician choice. Cabozantinib Adolescent Dose: 40 mg/m2. Vandetanib Adolescent Dose: * 0.7 - \<0.9 - 100 mg every other day (QOD) * 0.9 - \<1.2 - 100 mg QD * 1.2 - \<1.6 - 7-day schedule 100 mg - 200 mg - 100 mg - 200 mg - 100 mg - 200 mg - 100 mg * ≥1.6 - 200 QD

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

Analysis denominator · Participants

GroupSource count
Selpercatinib (TRT A)193
Cabozantinib or Vandetanib (TRT B)98

Reported measurements

Source class 1
Values in Months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
Selpercatinib (TRT A)NANot reportedNANAData unavailable due to high censoring.
Cabozantinib or Vandetanib (TRT B)16.76Not reported12.2225.10Not reported

Source statistical analyses

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

  1. ci Lower Limit
    0.165
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.475
    estimate Comment
    Stratified by RET mutation type (M918T vs. Others) and intended treatment if randomized to Arm B (Vandetanib vs. Cabozantinib).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.280
    statistical Comment
    Stratified by RET mutation type (M918T vs. Others) and intended treatment if randomized to Arm B (Vandetanib vs. Cabozantinib).
    statistical Method
    Log Rank
Complete source fields
analyses
  1. ci Lower Limit
    0.165
    ci Num Sides
    TWO_SIDED
    ci Pct Value
    95
    ci Upper Limit
    0.475
    estimate Comment
    Stratified by RET mutation type (M918T vs. Others) and intended treatment if randomized to Arm B (Vandetanib vs. Cabozantinib).
    group Ids
    1. OG000
    2. OG001
    non Inferiority Type
    SUPERIORITY
    p Value
    <0.0001
    param Type
    Hazard Ratio (HR)
    param Value
    0.280
    statistical Comment
    Stratified by RET mutation type (M918T vs. Others) and intended treatment if randomized to Arm B (Vandetanib vs. Cabozantinib).
    statistical Method
    Log Rank
classes
  1. categories
    1. measurements
      1. comment
        Data unavailable due to high censoring.
        group Id
        OG000
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
      2. group Id
        OG001
        lower Limit
        12.22
        upper Limit
        25.10
        value
        16.76
denoms
  1. counts
    1. group Id
      OG000
      value
      193
    2. group Id
      OG001
      value
      98
    units
    Participants
description
PFS is defined as the time from randomization until the occurrence of documented disease progression by the BICR, per Response Evaluation Criteria in Solid Tumors (RECIST 1.1) criteria, or death from any cause in the absence of BICR-documented progressive disease. Progressive Disease (PD) was at least a 20% increase in the sum of the diameters of target lesions, with reference being the smallest sum and an absolute increase of at least 5 mm, or unequivocal progression of non-target lesions, or 1 or more new lesions.
dispersion Type
95% Confidence Interval
groups
  1. description
    160 milligrams Selpercatinib administered orally (PO) twice daily (BID). Adolescent Dose: 92 mg/m2 BID (not to exceed 160 mg BID).
    id
    OG000
    title
    Selpercatinib (TRT A)
  2. description
    140 mg Cabozantinib administered orally daily (QD) or 300 mg Vandetanib administered orally QD per physician choice. Cabozantinib Adolescent Dose: 40 mg/m2. Vandetanib Adolescent Dose: * 0.7 - \<0.9 - 100 mg every other day (QOD) * 0.9 - \<1.2 - 100 mg QD * 1.2 - \<1.6 - 7-day schedule 100 mg - 200 mg - 100 mg - 200 mg - 100 mg - 200 mg - 100 mg * ≥1.6 - 200 QD
    id
    OG001
    title
    Cabozantinib or Vandetanib (TRT B)
param Type
MEDIAN
population Description
All randomized participants, even if a participant did not take the assigned treatment, did not receive the correct treatment, or otherwise did not follow the protocol. Censored participants: Selpercatinib - 167; Cabozantinib or Vandetanib - 66
reporting Status
POSTED
time Frame
Baseline to Progressive Disease or Death from Any Cause, Whichever Occurs First, Up to 39 Months
title
Progression Free Survival (PFS) by Blinded Independent Central Review (BICR)
type
PRIMARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice