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NCT02486718 · OUTCOME

Percentage of Participants With Anti-Therapeutic Antibodies (ATAs) to Atezolizumab

Study to Assess Safety and Efficacy of Atezolizumab (MPDL3280A) Compared to Best Supportive Care Following Chemotherapy in Patients With Lung Cancer [IMpower010] · Source last updated 2026-07-29

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

Measure
NUMBER
Unit
percentage of participants
Interval / dispersion
Not reported
Time frame
Predose (Hour 0) on Day 1 of Cycles 2, 3, 4, 8, 16 (Cycle length = 21 days), at treatment discontinuation (TD) (up to 12 months), 120 days after last atezolizumab administration (up to 16 months)

What was measured

The percentage of ATA (Also called anti-drug antibodies (ADA))-positive participants after drug administration were determined for participants exposed to atezolizumab. For determining post-baseline incidence, participants were considered to be ADA-positive if they were ADA-negative or had missing data at baseline but developed an ADA response following study drug exposure, or if they were ADA-positive at baseline and the titer of 1 or more post-baseline samples was at least 0.60 titer units (t.u.) greater than the baseline titer result.

Analysis population: ADA evaluable population was defined as all randomized participants who received at least one dose of atezolizumab and who have at least one post-baseline ADA result.

Groups in this outcome

Atezolizumab

Participants who did not experience disease recurrence after chemotherapy in enrollment phase received 1200 milligrams (mg) of atezolizumab intravenously (IV) every 3 weeks (Q3W) for sixteen 21-day cycles in the randomization phase.

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

Analysis denominator · Participants

GroupSource count
Atezolizumab487

Reported measurements

Source class 1
Values in percentage of participants · Interval/dispersion: Not reported
GroupValueSpreadLowerUpperComment
Atezolizumab31.2Not reportedNot reportedNot reportedNot reported
Complete source fields
classes
  1. categories
    1. measurements
      1. group Id
        OG000
        value
        31.2
denoms
  1. counts
    1. group Id
      OG000
      value
      487
    units
    Participants
description
The percentage of ATA (Also called anti-drug antibodies (ADA))-positive participants after drug administration were determined for participants exposed to atezolizumab. For determining post-baseline incidence, participants were considered to be ADA-positive if they were ADA-negative or had missing data at baseline but developed an ADA response following study drug exposure, or if they were ADA-positive at baseline and the titer of 1 or more post-baseline samples was at least 0.60 titer units (t.u.) greater than the baseline titer result.
groups
  1. description
    Participants who did not experience disease recurrence after chemotherapy in enrollment phase received 1200 milligrams (mg) of atezolizumab intravenously (IV) every 3 weeks (Q3W) for sixteen 21-day cycles in the randomization phase.
    id
    OG000
    title
    Atezolizumab
param Type
NUMBER
population Description
ADA evaluable population was defined as all randomized participants who received at least one dose of atezolizumab and who have at least one post-baseline ADA result.
reporting Status
POSTED
time Frame
Predose (Hour 0) on Day 1 of Cycles 2, 3, 4, 8, 16 (Cycle length = 21 days), at treatment discontinuation (TD) (up to 12 months), 120 days after last atezolizumab administration (up to 16 months)
title
Percentage of Participants With Anti-Therapeutic Antibodies (ATAs) to Atezolizumab
type
SECONDARY
unit Of Measure
percentage of participants

Download exact source JSON → · Snapshot ctgov-results-191f4516d4760045304b24a0

Preserved source evidence · Not medical advice