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Comparison · NCT03221426-b8213f52

Pembrolizumab + FLOT Cohort vs Placebo + FLOT Cohort: Number of Participants Who Experienced One or More Adverse Events (AEs) - Pembrolizumab+FLOT and Placebo+FLOT Cohorts

Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.

2 sourcestrial-comparisons-2026-03-23-0.1.0

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ConductScience Library. Pembrolizumab + FLOT Cohort vs Placebo + FLOT Cohort: Number of Participants Who Experienced One or More Adverse Events (AEs) - Pembrolizumab+FLOT and Placebo+FLOT Cohorts. Trial comparisons, record NCT03221426-b8213f52. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT03221426-b8213f52

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Measures6

Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.

MeasureValue95% interval, lower95% interval, upperMethodNote
Risk in group 110.9631wilson
Risk in group 210.9641wilson
Risk difference, group 1 minus group 20-0.03740.036newcombe hybrid score
Risk ratio, group 1 over group 2111log
Odds ratio, group 1 over group 2loga cell of the two-by-two table is zero
Number needed to treatfrom the risk difference intervalthe two groups' risks are equal

Groups2

Neither group, or both, names a comparator, so the groups keep ClinicalTrials.gov's order.

GroupTitleDescriptionWith the outcomeAnalysedClinicalTrials.gov code
Group 1Pembrolizumab + FLOT Cohort
FLOT=docetaxel+oxaliplatin+5FU+leucovorin (calcium folinate). Neoadjuvant: Prior to surgery, participants received 3 cycles of pembrolizumab 200 mg via IV infusion on Day 1 Q3W PLUS docetaxel 50 mg/m\^2 via IV infusion, oxaliplatin 85 mg/m\^2 via IV infusion, 5FU 2600 mg/m\^2 via IV infusion, and leucovorin (calcium folinate) 200 mg/m\^2 via IV infusion Q2W (on Days 1 and 15 of Cycle 1; Day 8 of Cycle 2, and Day 1 of Cycle 3, for 4 administrations).~Adjuvant: 4 to 10 weeks post-surgery, participants received 3 cycles of pembrolizumab 200 mg via IV infusion Day 1 Q3W PLUS docetaxel 50 mg/m\^2, oxaliplatin 85 mg/m\^2, 5FU 2600 mg/m\^2, and leucovorin 200 mg/m\^2 Q2W (on Days 1 and 15 of Cycle 1; Day 8 of Cycle 2, and Day 1 of Cycle 3, for 4 administrations), followed by pembrolizumab monotherapy 200 mg via IV infusion on Day 1 Q3W for up to 11 additional cycles.
9999OG000
Group 2Placebo + FLOT Cohort
Neoadjuvant: Prior to surgery, participants received 3 cycles of placebo (normal saline solution) via IV infusion on Day 1 Q3W PLUS docetaxel 50 mg/m\^2 via IV infusion, oxaliplatin 85 mg/m\^2 via IV infusion, 5FU 2600 mg/m\^2 via IV infusion, and leucovorin 200 mg/m\^2 via IV infusion Q2W (on Days 1 and 15 of Cycle 1; Day 8 of Cycle 2, and Day 1 of Cycle 3, for 4 administrations).~Adjuvant: 4 to 10 weeks post-surgery, participants received 3 cycles of placebo via IV infusion on Day 1 Q3W PLUS docetaxel 50 mg/m\^2 via IV infusion, oxaliplatin 85 mg/m\^2 via IV infusion, 5FU 2600 mg/m\^2 via IV infusion, and leucovorin 200 mg/m\^2 via IV infusion Q2W (on Days 1 and 15 of Cycle 1; Day 8 of Cycle 2, and Day 1 of Cycle 3, for 4 administrations), followed by placebo monotherapy via IV infusion on Day 1 Q3W for up to 11 additional cycles.
103103OG001

Outcome

Type
PRIMARY
Title
Number of Participants Who Experienced One or More Adverse Events (AEs) - Pembrolizumab+FLOT and Placebo+FLOT Cohorts
Description
An AE was defined as any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants who experience at least one AE was presented for the Pembrolizumab+FLOT and Placebo+FLOT Cohorts.
Time frame
Up to approximately 70 months
Population
The analysis population consisted of all participants who received ≥1 dose of study treatment in the Pembrolizumab+FLOT and Placebo+FLOT Cohort treatment arms, as pre-specified per protocol.

Source ClinicalTrials.gov

Trial

Title
Study of Pembrolizumab (MK-3475) Plus Chemotherapy Versus Placebo Plus Chemotherapy in Participants With Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma (MK-3475-585/KEYNOTE-585)
NCT number
NCT03221426
Phases
PHASE3
Conditions
Gastric Cancer, Gastroesophageal Junction Cancer
Interventions
Pembrolizumab, Placebo, Cisplatin, Capecitabine, 5-fluorouracil, Docetaxel, Oxaliplatin, Leucovorin
Lead sponsor
Merck Sharp & Dohme LLC
Results first posted
2025-02-20

Source ClinicalTrials.gov

Source

Release
trial-comparisons-2026-03-23-0.1.0
Release manifest SHA-256
f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
AACT copy
2026-03-23
Tables read
outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet

Source ClinicalTrials.gov

Sources 2

  • ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
  • ClinicalTrials.govNo license stated
Each source's terms
  • ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
  • ClinicalTrials.govnone stated

ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.

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