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NCT03037385 · OUTCOME

Phase 2: DOR

Phase 1/2 Study of the Highly-selective RET Inhibitor, Pralsetinib (BLU-667), in Participants With Thyroid Cancer, Non-Small Cell Lung Cancer, and Other Advanced Solid Tumors · Source last updated 2025-05-31

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 79.8 months

What was measured

DOR was defined as the time from first documented response (CR/PR) to the date of first documented PD or death due to any cause, whichever occurs first. CR was defined as the disappearance of all target lesions or any pathological lymph nodes (whether target or non-target) having a reduction in the short axis to \<10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in SOD of target lesions, taking as reference the smallest SOD on study (including baseline). DOR was analyzed using the KM methods.

Analysis population: RET-altered measurable disease population included participants in the efficacy population who have measurable (target) disease per RECIST v1.1, at baseline according to BICR \& sufficient evidence of a RET alteration. As prespecified in SAP, Phase 1 participants treated at 400 mg QD are pooled with Phase 2 participants for efficacy analysis. Participants who had a response of CR/PR were analyzed in this OM.

Groups in this outcome

RET- Fusion Positive NSCLC With Prior Platinum Treatment

Participants who had RET-fusion positive NSCLC previously treated with platinum-based chemotherapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-fusion Positive NSCLC With Non-platinum Systemic Treatment

Participants who had RET-fusion positive NSCLC previously treated with non-platinum or systemic therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-fusion Positive NSCLC With No Prior Systemic or Platinum Treatment

Participants who had RET-fusion positive NSCLC not previously treated with systemic or platinum-based chemotherapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-mutation MTC With Prior Cabozantinib and/or Vandetanib Treatment

Participants who had RET- mutation positive MTC previously treated with either cabozantinib and/or vandetanib therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-mutation MTC With No Prior Cabozantinib or Vandetanib Treatment

Participants who had RET- mutation positive MTC not previously treated with cabozantinib or vandetanib therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-fusion Positive TC

Participants who had RET-fusion positive TC received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-fusion Positive Solid Tumors Other Than NSCLC and TC

Participants who had other RET-positive solid tumors other than NSCLC and TC received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-altered Solid Tumors Previously Treated With RET Inhibitor

Participants who had RET-altered (fusion or mutation) solid tumors previously treated with a selective RET TKI received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

RET-mutation Positive Tumors Other Than MTC

Participants who had RET-mutation positive solid tumors received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.

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

Analysis denominator · Participants

GroupSource count
RET- Fusion Positive NSCLC With Prior Platinum Treatment82
RET-fusion Positive NSCLC With Non-platinum Systemic Treatment17
RET-fusion Positive NSCLC With No Prior Systemic or Platinum Treatment83
RET-mutation MTC With Prior Cabozantinib and/or Vandetanib Treatment34
RET-mutation MTC With No Prior Cabozantinib or Vandetanib Treatment56
RET-fusion Positive TC23
RET-fusion Positive Solid Tumors Other Than NSCLC and TC13
RET-altered Solid Tumors Previously Treated With RET Inhibitor4
RET-mutation Positive Tumors Other Than MTC1

Reported measurements

Source class 1
Values in months · Interval/dispersion: 95% Confidence Interval
GroupValueSpreadLowerUpperComment
RET- Fusion Positive NSCLC With Prior Platinum Treatment31.8Not reported15.140.4Not reported
RET-fusion Positive NSCLC With Non-platinum Systemic Treatment22.6Not reported11.147.9Not reported
RET-fusion Positive NSCLC With No Prior Systemic or Platinum Treatment13.4Not reported9.421.7Not reported
RET-mutation MTC With Prior Cabozantinib and/or Vandetanib Treatment21.7Not reported15.134.8Not reported
RET-mutation MTC With No Prior Cabozantinib or Vandetanib Treatment51.8Not reported36.8NAThe upper limit of 95% CI was not estimable due to insufficient number of participants with events.
RET-fusion Positive TCNANot reported12.9NAThe median and upper limit of 95% CI was not estimable due to insufficient number of participants with events.
RET-fusion Positive Solid Tumors Other Than NSCLC and TC11.1Not reported5.525.1Not reported
RET-altered Solid Tumors Previously Treated With RET InhibitorNANot reported6.0NAThe median and upper limit of 95% CI was not estimable due to insufficient number of participants with events.
RET-mutation Positive Tumors Other Than MTC5.5Not reportedNANAThe 95% CI was not estimable due to insufficient number of participants with events.
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        lower Limit
        15.1
        upper Limit
        40.4
        value
        31.8
      2. group Id
        OG001
        lower Limit
        11.1
        upper Limit
        47.9
        value
        22.6
      3. group Id
        OG002
        lower Limit
        9.4
        upper Limit
        21.7
        value
        13.4
      4. group Id
        OG003
        lower Limit
        15.1
        upper Limit
        34.8
        value
        21.7
      5. comment
        The upper limit of 95% CI was not estimable due to insufficient number of participants with events.
        group Id
        OG004
        lower Limit
        36.8
        upper Limit
        NA
        value
        51.8
      6. comment
        The median and upper limit of 95% CI was not estimable due to insufficient number of participants with events.
        group Id
        OG005
        lower Limit
        12.9
        upper Limit
        NA
        value
        NA
      7. group Id
        OG006
        lower Limit
        5.5
        upper Limit
        25.1
        value
        11.1
      8. comment
        The median and upper limit of 95% CI was not estimable due to insufficient number of participants with events.
        group Id
        OG007
        lower Limit
        6.0
        upper Limit
        NA
        value
        NA
      9. comment
        The 95% CI was not estimable due to insufficient number of participants with events.
        group Id
        OG008
        lower Limit
        NA
        upper Limit
        NA
        value
        5.5
denoms
  1. counts
    1. group Id
      OG000
      value
      82
    2. group Id
      OG001
      value
      17
    3. group Id
      OG002
      value
      83
    4. group Id
      OG003
      value
      34
    5. group Id
      OG004
      value
      56
    6. group Id
      OG005
      value
      23
    7. group Id
      OG006
      value
      13
    8. group Id
      OG007
      value
      4
    9. group Id
      OG008
      value
      1
    units
    Participants
description
DOR was defined as the time from first documented response (CR/PR) to the date of first documented PD or death due to any cause, whichever occurs first. CR was defined as the disappearance of all target lesions or any pathological lymph nodes (whether target or non-target) having a reduction in the short axis to \<10 mm. PR was defined as at least a 30% decrease in the SOD of all target lesions, taking as reference the baseline SOD, in the absence of CR. PD was defined as at least a 20% increase in SOD of target lesions, taking as reference the smallest SOD on study (including baseline). DOR was analyzed using the KM methods.
dispersion Type
95% Confidence Interval
groups
  1. description
    Participants who had RET-fusion positive NSCLC previously treated with platinum-based chemotherapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG000
    title
    RET- Fusion Positive NSCLC With Prior Platinum Treatment
  2. description
    Participants who had RET-fusion positive NSCLC previously treated with non-platinum or systemic therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG001
    title
    RET-fusion Positive NSCLC With Non-platinum Systemic Treatment
  3. description
    Participants who had RET-fusion positive NSCLC not previously treated with systemic or platinum-based chemotherapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG002
    title
    RET-fusion Positive NSCLC With No Prior Systemic or Platinum Treatment
  4. description
    Participants who had RET- mutation positive MTC previously treated with either cabozantinib and/or vandetanib therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG003
    title
    RET-mutation MTC With Prior Cabozantinib and/or Vandetanib Treatment
  5. description
    Participants who had RET- mutation positive MTC not previously treated with cabozantinib or vandetanib therapies received pralsetinib, 400 mg orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG004
    title
    RET-mutation MTC With No Prior Cabozantinib or Vandetanib Treatment
  6. description
    Participants who had RET-fusion positive TC received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG005
    title
    RET-fusion Positive TC
  7. description
    Participants who had other RET-positive solid tumors other than NSCLC and TC received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG006
    title
    RET-fusion Positive Solid Tumors Other Than NSCLC and TC
  8. description
    Participants who had RET-altered (fusion or mutation) solid tumors previously treated with a selective RET TKI received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG007
    title
    RET-altered Solid Tumors Previously Treated With RET Inhibitor
  9. description
    Participants who had RET-mutation positive solid tumors received pralsetinib, 400 mg, orally, QD until discontinuation due to toxicity, disease progression, or other reasons.
    id
    OG008
    title
    RET-mutation Positive Tumors Other Than MTC
param Type
MEDIAN
population Description
RET-altered measurable disease population included participants in the efficacy population who have measurable (target) disease per RECIST v1.1, at baseline according to BICR \& sufficient evidence of a RET alteration. As prespecified in SAP, Phase 1 participants treated at 400 mg QD are pooled with Phase 2 participants for efficacy analysis. Participants who had a response of CR/PR were analyzed in this OM.
reporting Status
POSTED
time Frame
Up to approximately 79.8 months
title
Phase 2: DOR
type
SECONDARY
unit Of Measure
months

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Preserved source evidence · Not medical advice