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NCT03066778 · OUTCOME

Duration of Response (DOR) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR)

A Study of Pembrolizumab (MK-3475) in Combination With Etoposide/Platinum (Cisplatin or Carboplatin) for Participants With Extensive Stage Small Cell Lung Cancer (MK-3475-604/KEYNOTE-604) · Source last updated 2022-10-03

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

Measure
MEDIAN
Unit
Months
Interval / dispersion
Full Range
Time frame
Up to approximately 30.5 months

What was measured

DOR was defined as the time from first documented evidence of a Complete Response (CR) or Partial Response (PR) per RECIST 1.1 until progressive disease (PD) per RECIST 1.1 or death due to any cause, whichever occurred first. CR was defined as the disappearance of all target lesions. PR was defined as ≥30% decrease in the sum of diameters of target lesions taking as a reference the baseline sum diameters. PD was defined as ≥20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of ≥1 new lesions was also considered PD. In this study, RECIST 1.1 was modified to follow a maximum of 10 target lesions and a maximum of 5 target lesions per organ. The DOR was calculated using the product-limit (Kaplan-Meier) method for censored data and is presented for the first course of study treatment per protocol.

Analysis population: The analysis population consisted of all randomized participants who were included in the treatment group to which they were randomized and experienced a CR or PR.

Groups in this outcome

Pembrolizumab+EP

During each 21-day cycle, participants received pembrolizumab 200 mg intravenously (IV) on Day 1 PLUS etoposide 100 mg/m\^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum therapy (carboplatin titrated to an area under the plasma drug concentration-time curve \[AUC\] 5 IV on Day 1 OR cisplatin 75 mg/m\^2 IV on Day 1). Participants who stopped pembrolizumab as a result of obtaining a response of stable disease (SD), partial response (PR), complete response (CR) or those who stopped after receiving pembrolizumab for 24 months for reasons other than disease progression or intolerability, were eligible for up to an additional 1 year of treatment after progressive disease if they met the criteria for retreatment.

Placebo+EP

During each 21-day cycle, participants received placebo (normal saline solution) IV on Day 1 PLUS etoposide 100 mg/m\^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum therapy (carboplatin titrated to an AUC 5 IV on Day 1 OR cisplatin 75 mg/m\^2 IV on Day 1).

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

Analysis denominator · Participants

GroupSource count
Pembrolizumab+EP161
Placebo+EP139

Reported measurements

Source class 1
Values in Months · Interval/dispersion: Full Range
GroupValueSpreadLowerUpperComment
Pembrolizumab+EPNANot reportedNANANA=median DOR and upper and lower limits not reached due to no progressive disease by time of last disease assessment
Placebo+EPNANot reportedNANANA=median DOR and upper and lower limits not reached due to no progressive disease by time of last disease assessment
Complete source fields
classes
  1. categories
    1. measurements
      1. comment
        NA=median DOR and upper and lower limits not reached due to no progressive disease by time of last disease assessment
        group Id
        OG000
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
      2. comment
        NA=median DOR and upper and lower limits not reached due to no progressive disease by time of last disease assessment
        group Id
        OG001
        lower Limit
        NA
        upper Limit
        NA
        value
        NA
denoms
  1. counts
    1. group Id
      OG000
      value
      161
    2. group Id
      OG001
      value
      139
    units
    Participants
description
DOR was defined as the time from first documented evidence of a Complete Response (CR) or Partial Response (PR) per RECIST 1.1 until progressive disease (PD) per RECIST 1.1 or death due to any cause, whichever occurred first. CR was defined as the disappearance of all target lesions. PR was defined as ≥30% decrease in the sum of diameters of target lesions taking as a reference the baseline sum diameters. PD was defined as ≥20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of ≥1 new lesions was also considered PD. In this study, RECIST 1.1 was modified to follow a maximum of 10 target lesions and a maximum of 5 target lesions per organ. The DOR was calculated using the product-limit (Kaplan-Meier) method for censored data and is presented for the first course of study treatment per protocol.
dispersion Type
Full Range
groups
  1. description
    During each 21-day cycle, participants received pembrolizumab 200 mg intravenously (IV) on Day 1 PLUS etoposide 100 mg/m\^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum therapy (carboplatin titrated to an area under the plasma drug concentration-time curve \[AUC\] 5 IV on Day 1 OR cisplatin 75 mg/m\^2 IV on Day 1). Participants who stopped pembrolizumab as a result of obtaining a response of stable disease (SD), partial response (PR), complete response (CR) or those who stopped after receiving pembrolizumab for 24 months for reasons other than disease progression or intolerability, were eligible for up to an additional 1 year of treatment after progressive disease if they met the criteria for retreatment.
    id
    OG000
    title
    Pembrolizumab+EP
  2. description
    During each 21-day cycle, participants received placebo (normal saline solution) IV on Day 1 PLUS etoposide 100 mg/m\^2 IV on Days 1, 2 and 3 PLUS investigator's choice of platinum therapy (carboplatin titrated to an AUC 5 IV on Day 1 OR cisplatin 75 mg/m\^2 IV on Day 1).
    id
    OG001
    title
    Placebo+EP
param Type
MEDIAN
population Description
The analysis population consisted of all randomized participants who were included in the treatment group to which they were randomized and experienced a CR or PR.
reporting Status
POSTED
time Frame
Up to approximately 30.5 months
title
Duration of Response (DOR) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR)
type
SECONDARY
unit Of Measure
Months

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Preserved source evidence · Not medical advice