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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT03189719
Other study ID # 3475-590
Secondary ID 173739MK-3475-59
Status Completed
Phase Phase 3
First received
Last updated
Start date July 25, 2017
Est. completion date July 10, 2023

Study information

Verified date May 2024
Source Merck Sharp & Dohme LLC
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The purpose of this trial is to evaluate efficacy and safety of pembrolizumab plus standard of care (SOC) chemotherapy with cisplatin and 5-fluorouracil (5-FU) versus placebo plus SOC chemotherapy with cisplatin and 5-FU as first-line treatment in participants with locally advanced or metastatic esophageal carcinoma. The overall primary efficacy hypotheses are as follows: 1. In participants with esophageal squamous cell carcinoma (ESCC), participants whose tumors are programmed cell death-ligand 1 (PD-L1)-positive (defined as combined positive score [CPS] ≥10), ESCC participants whose tumors are PD-L1 positive (CPS ≥10), and in all participants, overall survival (OS) is superior with pembrolizumab plus SOC chemotherapy compared with placebo plus SOC chemotherapy. 2. In participants with ESCC, participants whose tumors are PD-L1 positive (CPS ≥10), and in all participants, progression-free survival (PFS) according to Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 as assessed by investigator is superior with pembrolizumab plus SOC chemotherapy compared with placebo plus SOC chemotherapy.


Recruitment information / eligibility

Status Completed
Enrollment 749
Est. completion date July 10, 2023
Est. primary completion date July 2, 2020
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: - Has histologically- or cytologically-confirmed diagnosis of locally advanced unresectable or metastatic adenocarcinoma or squamous cell carcinoma of the esophagus or advanced/metastatic Siewert type 1 adenocarcinoma of the esophagogastric junction (EGJ) - Has measurable disease per RECIST 1.1 as determined by the local site investigator/radiology assessment - Eastern Cooperative Group (ECOG) performance status of 0 to 1 - Can provide either a newly obtained or archival tissue sample for PD-L1 by immunohistochemistry analysis - Female participants of childbearing potential must have a negative urine or serum pregnancy test within 72 hours prior to randomization and be willing to use an adequate method of contraception (e.g. abstinence, intrauterine device, diaphragm with spermicide, etc.) for the course of the study through 120 days after the last dose of study treatment and up to 180 days after last dose of cisplatin - Male participants of childbearing potential must agree to use an adequate method of contraception (e.g. abstinence, vasectomy, male condom, etc.) starting with the first dose of study treatment through 120 days after the last dose of study treatment and up to 180 days after last dose of cisplatin, and refrain from donating sperm during this period - Has adequate organ function Exclusion Criteria: - Has locally advanced esophageal carcinoma that is resectable or potentially curable with radiation therapy (as determined by local investigator) - Has had previous therapy for advanced/metastatic adenocarcinoma or squamous cell cancer of the esophagus or advanced/metastatic Siewert type 1 adenocarcinoma of the EGJ - Has had major surgery, open biopsy, or significant traumatic injury within 28 days prior to randomization, or anticipation of the need for major surgery during the course of study treatment - Has a known additional malignancy that is progressing or requires active treatment. Exceptions include early-stage cancers (carcinoma in situ or Stage 1) treated with curative intent, basal cell carcinoma of the skin, squamous cell carcinoma of the skin, in situ cervical cancer, in situ breast cancer that has undergone potentially curative therapy, and in situ or intramucosal pharyngeal cancer - Has known active central nervous system metastases and/or carcinomatous meningitis. - Has an active autoimmune disease that has required systemic treatment in past 2 years - Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior to the first dose of study treatment, or has a history of organ transplant, including allogeneic stem cell transplant - Has a history of (non-infectious) pneumonitis that required steroids or has current pneumonitis, or has an active infection requiring systemic therapy - Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of study medication and up to 180 days after last dose of cisplatin - Has received prior therapy with an anti-programmed cell death protein-1 (anti-PD-1), anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another co-inhibitory T-cell receptor or has previously participated in a pembrolizumab (MK-3475) clinical trial - Has severe hypersensitivity (= Grade 3) to any study treatment (pembrolizumab, cisplatin, or 5-FU) and/or any of its excipients - Has a known history of active tuberculosis (TB; Mycobacterium tuberculosis) or human immunodeficiency virus (HIV) infection - Has known history of or is positive for hepatitis B or hepatitis C - Has received a live vaccine within 30 days prior to the first dose of study treatment - Has had radiotherapy within 14 days of randomization. Participants who received radiotherapy >14 days prior to randomization must have completely recovered from any radiotherapy-related AEs/toxicities

Study Design


Related Conditions & MeSH terms


Intervention

Biological:
Pembrolizumab
200 mg administered IV Q3W on Day 1 of each 3-week cycle, up to 35 administrations.
Drug:
Placebo
Placebo to pembrolizumab (saline) administered IV Q3W on Day 1 of each 3-week cycle, up to 35 administrations.
Cisplatin
80 mg/m^2 administered IV Q3W on Day 1 of each 3-week cycle. Duration of cisplatin treatment will be capped at 6 doses.
5-FU
800 mg/m^2/day (4000 mg/m^2 total per cycle) administered as continuous IV infusion on Days 1 to 5 (120 hours) of each 3-week cycle, or per local standard for 5-FU administration, up to 35 administrations.

Locations

Country Name City State
Argentina Hospital Aleman ( Site 0605) Buenos Aires
Argentina Hospital Municipal de Gastroenterologia Dr. Bonorino Udaondo ( Site 0602) Buenos Aires
Argentina Hospital Privado Centro Medico Cordoba ( Site 0601) Cordoba
Argentina Sanatorio Allende - Cordoba ( Site 0604) Cordoba
Argentina Centro de Investigaciones Clinicas - Clinica Viedma ( Site 0603) Viedma Rio Negro
Australia Blacktown Hospital ( Site 2000) Blacktown New South Wales
Australia Eastern Health ( Site 2002) Box Hill Victoria
Australia Liverpool Hospital. ( Site 2001) Liverpool New South Wales
Australia Peter MacCallum Cancer Centre ( Site 2003) Melbourne Victoria
Australia Princess Alexandra Hospital ( Site 2005) Woolloongabba Queensland
Brazil CETUS Hospital Dia Oncologia ( Site 0208) Belo Horizonte Minas Gerais
Brazil Hospital Sao Vicente de Paulo ( Site 0204) Passo Fundo RS
Brazil Hospital de Clinicas de Porto Alegre ( Site 0200) Porto Alegre
Brazil Uniao Brasileira de Educacao e Assistencia Hospital Sao Lucas da Pucrs ( Site 0201) Porto Alegre RS
Brazil Inst de Medicina Integral Professor Fernando Figueira- IMIP ( Site 0210) Recife Pernambuco
Brazil Instituto Nacional do Cancer Jose Alencar Gomes da Silva INCA ( Site 0209) Rio de Janeiro RJ
Brazil Clinica de Hematologia e Oncologia Viver Ltda ( Site 0211) Santa Maria Rio Grande Do Sul
Brazil Fundacao Faculdade Regional de Medicina de Sao Jose do Rio Preto. ( Site 0203) Sao Jose do Rio Preto Sao Paulo
Brazil Hospital Alemao Oswaldo Cruz ( Site 0207) Sao Paulo SP
Brazil Instituto do Cancer de Sao Paulo - ICESP ( Site 0206) Sao Paulo
Canada Tom Baker Cancer Centre ( Site 0503) Calgary Alberta
Canada Cross Cancer Institute ( Site 0502) Edmonton Alberta
Canada CISSS de la Monteregie-Centre ( Site 0504) Greenfield Park Quebec
Canada Juravinski Cancer Center ( Site 0508) Hamilton Ontario
Canada Jewish General Hospital ( Site 0507) Montreal Quebec
Canada The Ottawa Hospital - Cancer Care ( Site 0501) Ottawa Ontario
Canada Princess Margaret Cancer Centre ( Site 0505) Toronto Ontario
Canada CancerCare Manitoba ( Site 0500) Winnipeg Manitoba
Chile Hospital Regional de Concepcion Dr. Guillermo Grant Benavente ( Site 1003) Concepcion
Chile Hospital Clinico Universidad de Chile ( Site 1002) Santiago
Chile Pontificia Universidad Catolica de Chile ( Site 1001) Santiago
Chile Clinica Alemana de Temuco ( Site 1006) Temuco
China Beijing Cancer Hospital ( Site 0100) Beijing
China Peking Union Medical College Hospital ( Site 0123) Beijing Beijing
China Jilin Cancer Hospital ( Site 0101) Changchun Jilin
China Hunan Cancer Hospital ( Site 0105) Changsha Hunan
China Fujian Provincial Cancer Hospital ( Site 0104) Fuzhou
China Guangdong General Hospital ( Site 0103) Guangzhou Guangdong
China Zhejiang Cancer Hospital ( Site 0116) Hangzhou Zhejiang
China The Affiliated Tumour Hospital of Harbin Medical University ( Site 0102) Harbin Heilongjiang
China Anhui Provincial Hospital ( Site 0106) Hefei Anhui
China The First Affiliated Hospital of Anhui Medical University ( Site 0112) Hefei Anhui
China PLA Cancer Centre of Nanjing Bayi Hospital ( Site 0110) Nanjing Jiangsu
China Zhongda Hospital Southeast University ( Site 0125) Nanjing Jiangsu
China Fudan University Shanghai Cancer Center ( Site 0108) Shanghai
China Renji Hospital Shanghai Jiaotong University School of Medicine ( Site 0114) Shanghai
China Shanghai Chest Hospital ( Site 0111) Shanghai
China Tongji Medical College Huazhong University of Science and Technology ( Site 0109) Wuhan Hubei
China The First Affiliated Hospital of Xi an Jiaotong University ( Site 0120) Xi'an Shannxi
China The First Affiliated Hospital of Xiamen University ( Site 0119) Xiamen Fujian
China Henan Cancer Hospital ( Site 0107) Zhengzhou
Colombia Rodrigo Botero SAS ( Site 2703) Medellin Antioquia
Colombia Oncomedica S.A. ( Site 2701) Monteria Cordoba
Costa Rica CIMCA Centro de Investigacion y Manejo del Cancer ( Site 2600) San Jose
Costa Rica ICIMED - Instituto de Investigacion en Ciencias Medicas ( Site 2601) San Jose
Costa Rica Policlinico San Bosco ( Site 2602) San Jose
Denmark Rigshospitalet ( Site 2301) Copenhagen
Denmark Odense Universitetshospital ( Site 2300) Odense
France CHU Brest - Institut de Cancerologie et d Hematologie ( Site 0305) Brest
France Centre Francois Baclesse ( Site 0310) Caen
France Centre Oscar Lambret ( Site 0304) Lille
France Centre Leon Berard ( Site 0307) Lyon Cedex 8
France Institut du Cancer de Montpellier ( Site 0306) Montpellier
France CHU de Nantes - Hotel Dieu ( Site 0303) Nantes Cedex 1
France Institut Mutualiste Montsouris ( Site 0300) Paris
France CHU de Saint Etienne Hopital Nord ( Site 0309) Saint Etienne
Germany Staedtisches Klinikum Dresden ( Site 1507) Dresden
Germany Haematologisch-Onkologische Praxis Eppendorf Facharztzentrum Eppendorf - Hope ( Site 1502) Hamburg
Germany Universitaetsklinikum Leipzig ( Site 1501) Leipzig
Germany Klinikum Ludwigsburg ( Site 1509) Ludwigsburg
Germany Universitatsklinikum Mannheim GmbH ( Site 1504) Mannheim
Germany Klinik fuer Haematologie. Onkologie und Gastroenterologie ( Site 1508) Moenchengladbach
Germany III. Medizinische Klinik Klinikum rechts der Isar ( Site 1506) Munchen
Guatemala Centro de Investigacion Oncologica ( Site 1402) Guatemala
Guatemala Grupo Medico Angeles ( Site 1401) Guatemala
Guatemala Medi-K Cayala ( Site 1404) Guatemala
Guatemala Oncomedica ( Site 1400) Guatemala
Guatemala Centro Regional de Sub Especialidades Medicas SA ( Site 1403) Quetzaltenango
Hong Kong Humanity Health Research Centre ( Site 1603) Hong Kong
Hong Kong Pamela Youde Nethersole Eastern Hospital ( Site 1601) Hong Kong
Hong Kong Princess Margaret Hospital. ( Site 1602) Hong Kong
Hong Kong Queen Mary Hospital ( Site 1600) Hong Kong
Japan Hyogo Cancer Center ( Site 0913) Akashi Hyogo
Japan Chiba Cancer Center ( Site 0900) Chiba
Japan Chiba University Hospital ( Site 0909) Chiba
Japan Kyushu University Hospital ( Site 0922) Fukuoka
Japan National Hospital Organization Kyushu Cancer Center ( Site 0906) Fukuoka
Japan Gifu University Hospital ( Site 0920) Gifu
Japan Kansai Medical University Hospital ( Site 0931) Hirakata Osaka
Japan Ibaraki Prefectural Central Hospital ( Site 0918) Kasama Ibaraki
Japan National Cancer Center Hospital East ( Site 0908) Kashiwa Chiba
Japan St. Marianna University School of Medicine Hospital ( Site 0903) Kawasaki Kanagawa
Japan Kagawa University Hospital ( Site 0915) Kita-gun Kagawa
Japan Saitama Cancer Center ( Site 0926) Kitaadachi-gun Saitama
Japan Kobe City Medical Center General Hospital ( Site 0929) Kobe Hyogo
Japan Kumamoto University Hospital ( Site 0919) Kumamoto
Japan National Hospital Organization Shikoku Cancer Center ( Site 0901) Matsuyama Ehime
Japan Kyorin University Hospital ( Site 0905) Mitaka Tokyo
Japan Aichi Cancer Center Hospital ( Site 0902) Nagoya Aichi
Japan Niigata Cancer Center Hospital ( Site 0924) Niigata
Japan Osaka General Medical Center ( Site 0912) Osaka
Japan Osaka International Cancer Institute ( Site 0923) Osaka
Japan Kindai University Hospital ( Site 0917) Osakasayama Osaka
Japan Hokkaido University Hospital ( Site 0916) Sapporo Hokkaido
Japan Osaka University Hospital ( Site 0911) Suita Osaka
Japan Shizuoka Cancer Center Hospital and Research Institute ( Site 0914) Sunto-gun Shizuoka
Japan Osaka Medical College Hospital ( Site 0925) Takatsuki Osaka
Japan Keio University Hospital ( Site 0927) Tokyo
Japan National Cancer Center Hospital ( Site 0907) Tokyo
Japan The Cancer Institute Hospital of JFCR ( Site 0904) Tokyo
Japan University of Tsukuba Hospital ( Site 0910) Tsukuba Ibaraki
Japan Kanagawa Cancer Center ( Site 0921) Yokohama Kanagawa
Japan Oita University Hospital ( Site 0930) Yufu Oita
Korea, Republic of National Cancer Center ( Site 1304) Goyang-si Gyeonggi-do
Korea, Republic of Chonnam National University Hwasun Hospital ( Site 1305) Hwasun Gun Jeollanam Do
Korea, Republic of Asan Medical Center ( Site 1303) Seoul
Korea, Republic of Samsung Medical Center ( Site 1300) Seoul
Korea, Republic of Seoul National University Cancer Hospital ( Site 1301) Seoul
Korea, Republic of Severance Hospital Yonsei University Health System ( Site 1302) Seoul
Malaysia Hospital Kuala Lumpur ( Site 1805) Kuala Lumpur
Malaysia University Malaya Medical Centre ( Site 1802) Kuala Lumpur
Malaysia Beacon International Specialist Centre ( Site 1803) Petaling Jaya Selangor
Peru Instituto Regional de Enfermedades Neoplasicas del Sur IRENSUR ( Site 1702) Arequipa
Peru Hospital Nacional Guillermo Almenara Irigoyen ( Site 1701) Lima
Peru Instituto Nacional de Enfermedades Neoplasicas ( Site 1705) Lima
Romania S.C.Focus Lab Plus S.R.L ( Site 2401) Bucuresti Sector 2
Romania S.C.Gral Medical S.R.L ( Site 2406) Bucuresti
Romania S.C. Radiotherapy Center Cluj S.R.L ( Site 2407) Comuna Floresti Cluj
Romania Spitalul Clinic Judetean De Urgenta Constanta ( Site 2402) Constanta
Romania S.C. Centrul de Oncologie Sf. Nectarie SRL ( Site 2404) Craiova Dolj
Romania S C Pelican Impex SRL ( Site 2403) Oradea Bihor
Romania S C Oncocenter Oncologie Medicala S R L ( Site 2405) Timisoara Timis
Russian Federation N.N. Blokhin NMRCO ( Site 0401) Moscow
Russian Federation National Medical and Surgical Center n.a. N.I.Pirogov ( Site 0402) Moscow
Russian Federation Leningrad Regional Oncology Center ( Site 0405) Saint-Petersburg Vsevolzhsk District
Russian Federation Scientific Research Oncology Institute n.a. N.N.Petrov ( Site 0406) Saint-Petersburg
Russian Federation St Petersburg City Clinical Oncology Dispensary ( Site 0409) St. Petersburg
Russian Federation Tomsk Scientific Research Institute of Oncology ( Site 0403) Tomsk
Russian Federation SBHCI RCOD of MHC RB ( Site 0407) Ufa Republic Of Bashkortostan
South Africa Clinton Oncology Centre ( Site 2505) Alberton
South Africa Cape Town Oncology Trials Pty Ltd ( Site 2508) Cape Town Western Cape
South Africa The Oncology Centre ( Site 2502) Durban Kwa-Zulu Natal
South Africa Outeniqua Cancercare Oncology Unit ( Site 2504) George Western Cape
South Africa The Medical Oncology Centre of Rosebank ( Site 2506) Johannesburg Gauteng
South Africa WITS Clinical Research CMJAH Clinical Trial Site ( Site 2500) Parktown Gauteng
South Africa Cancer Care Langenhoven Drive Oncology Centre ( Site 2501) Port Elizabeth Eastern Cape
Spain Hosp. Gral. Universitari Germans Trias i Pujol ( Site 0701) Badalona Barcelona
Spain Hospital Universitari Vall d Hebron ( Site 0702) Barcelona
Spain Hospital Universitario Reina Sofia ( Site 0706) Cordoba
Spain Hospital Ramon y Cajal ( Site 0703) Madrid
Spain Hospital Universitario La Paz ( Site 0700) Madrid
Spain Complejo Hospitalario Virgen De La Victoria ( Site 0705) Malaga
Spain Hospital Universitario Central de Asturias ( Site 0708) Oviedo Asturias
Taiwan Chang Gung Med Foundation. Kaohsiung Branch ( Site 1906) Kaohsiung
Taiwan Taipei Medical University Shuang Ho Hospital ( Site 1908) New Taipei
Taiwan China Medical University Hospital ( Site 1904) Taichung
Taiwan Kuang Tien General Hospital ( Site 1909) Taichung
Taiwan Chi Mei Medical Center Liuying ( Site 1907) Tainan
Taiwan National Cheng Kung University Hospital ( Site 1905) Tainan
Taiwan Koo Foundation Sun Yat-Sen Cancer Center ( Site 1902) Taipei
Taiwan National Taiwan University Hospital ( Site 1900) Taipei
Taiwan Chang Gung Medical Foundation. Linkou ( Site 1903) Taoyuan
Thailand Bumrungrad International Hospital ( Site 2203) Bangkok
Thailand Chulalongkorn Hospital ( Site 2201) Bangkok
Thailand Phramongkutklao Hospital ( Site 2205) Bangkok
Thailand Ramathibodi Hospital. ( Site 2202) Bangkok
Thailand Songklanagarind Hospital ( Site 2204) Songkla
Turkey Adana Sehir Hastanesi ( Site 0802) Adana
Turkey Ankara Sehir Hastanesi ( Site 0808) Ankara
Turkey Istanbul Medeniyet Universitesi Goztepe EAH ( Site 0807) Istanbul
Turkey Istanbul Universitesi Cerrahpasa Tip Fakultesi ( Site 0804) Istanbul
Turkey Marmara Universitesi Pendik Egitim ve Arastirma Hastanesi ( Site 0801) Istanbul
Turkey Medical Park Izmir Hastanesi ( Site 0800) Izmir
Turkey Inonu Universitesi Turgut Ozal Tip Merkezi ( Site 0803) Malatya
United Kingdom Lothian University Hospitals NHS Trust ( Site 1101) Edinburgh Mid Lothian
United Kingdom St Luke's Cancer Centre ( Site 1102) Guildford
United Kingdom The Christie NHS Foundation Trust ( Site 1100) Manchester
United States University of Maryland Medical Center ( Site 0013) Baltimore Maryland
United States Dana Farber Cancer Center ( Site 0009) Boston Massachusetts
United States Roswell Park Cancer Institute ( Site 0004) Buffalo New York
United States The University of Chicago Medical Center ( Site 0001) Chicago Illinois
United States University Hospitals Cleveland Medical Center ( Site 0002) Cleveland Ohio
United States Henry Ford Cancer Center ( Site 0018) Detroit Michigan
United States University of Tennessee Medical Center Knoxville ( Site 0017) Knoxville Tennessee
United States Weill Cornell Medical College ( Site 0024) New York New York
United States UPMC Cancer Center/Hillman Cancer Center ( Site 0015) Pittsburgh Pennsylvania
United States Washington University School of Medicine ( Site 0031) Saint Louis Missouri
United States Kaiser Permanente Southern California ( Site 0003) West Los Angeles California
United States University of Kansas ( Site 0029) Westwood Kansas

Sponsors (1)

Lead Sponsor Collaborator
Merck Sharp & Dohme LLC

Countries where clinical trial is conducted

United States,  Argentina,  Australia,  Brazil,  Canada,  Chile,  China,  Colombia,  Costa Rica,  Denmark,  France,  Germany,  Guatemala,  Hong Kong,  Japan,  Korea, Republic of,  Malaysia,  Peru,  Romania,  Russian Federation,  South Africa,  Spain,  Taiwan,  Thailand,  Turkey,  United Kingdom, 

Outcome

Type Measure Description Time frame Safety issue
Primary Overall Survival (OS) in Participants With Esophageal Squamous Cell Carcinoma (ESCC) Whose Tumors Are Programmed Cell Death-Ligand 1 (PD-L1) Biomarker-Positive (Combined Positive Score [CPS] =10) Overall survival was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Per protocol, OS is reported here for all participants of the Intent-To-Treat (ITT) population (all randomized) who had ESCC and who were PD-L1 CPS =10. Up to approximately 34 months
Primary OS in Participants With ESCC Overall survival was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Per protocol, OS is reported here for all participants of the ITT population (all randomized) who had ESCC. Up to approximately 34 months
Primary OS in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) Overall survival was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Per protocol, OS is reported here for all participants of the ITT population (all randomized) who were PD-L1 CPS =10. Up to approximately 34 months
Primary OS in All Participants Overall survival was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Per protocol, OS is reported here for all participants of the ITT population (all randomized). Up to approximately 34 months
Primary Progression-free Survival (PFS) Per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) As Assessed By Investigator in Participants With ESCC PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as =20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, PFS is reported here for all participants of the ITT population (all randomized) who had ESCC. Up to approximately 34 months
Primary PFS Per RECIST 1.1 As Assessed By Investigator in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as =20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, PFS is reported here for all participants of the ITT population (all randomized) who were PD-L1 CPS =10. Up to approximately 34 months
Primary PFS Per RECIST 1.1 As Assessed By Investigator in All Participants PFS was defined as the time from randomization to the first documented progressive disease (PD) per RECIST 1.1 as assessed by the investigator, or death due to any cause, whichever occurred first. Per RECIST 1.1, PD was defined as =20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, PFS is reported here for all participants of the ITT population (all randomized). Up to approximately 34 months
Secondary Objective Response Rate (ORR) Per RECIST 1.1 As Assessed By Investigator in All Participants ORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: disappearance of all target lesions) or a Partial Response (PR: =30% decrease in the sum of diameters of target lesions) per RECIST 1.1. as assessed by the investigator. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, the percentage of participants who experienced CR or PR is reported here as the ORR for all participants of the ITT population (all randomized). Up to approximately 34 months
Secondary ORR Per RECIST 1.1 As Assessed By Investigator in Participants With ESCC Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) ORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: disappearance of all target lesions) or a Partial Response (PR: =30% decrease in the sum of diameters of target lesions) per RECIST 1.1. as assessed by the investigator. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, the percentage of participants who experienced CR or PR is reported here as the ORR for all participants of the ITT population (all randomized) who had ESCC and who were PD-L1 CPS =10. Up to approximately 34 months
Secondary ORR Per RECIST 1.1 As Assessed By Investigator in Participants With ESCC ORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: disappearance of all target lesions) or a Partial Response (PR: =30% decrease in the sum of diameters of target lesions) per RECIST 1.1. as assessed by the investigator. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, the percentage of participants who experienced CR or PR is reported here as the ORR for all participants of the ITT population (all randomized) who had ESCC. Up to approximately 34 months
Secondary ORR Per RECIST 1.1 As Assessed By Investigator in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) ORR was defined as the percentage of participants in the analysis population who had a Complete Response (CR: disappearance of all target lesions) or a Partial Response (PR: =30% decrease in the sum of diameters of target lesions) per RECIST 1.1. as assessed by the investigator. The sponsor allowed a maximum of 10 target lesions in total and 5 per organ on this study. Per protocol, the percentage of participants who experienced CR or PR is reported here as the ORR for all participants of the ITT population (all randomized) who were PD-L1 CPS =10. Up to approximately 34 months
Secondary Duration of Response (DOR) Per RECIST 1.1 As Assessed By Investigator in All Participants For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1 as assessed by the investigator, DOR was defined as the time from first documented evidence of confirmed CR or PR until PD or death due to any cause, whichever occurred first. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. Per protocol, DOR is reported here for all participants of the ITT population (all randomized) who had CR or PR. Up to approximately 34 months
Secondary DOR Per RECIST 1.1 As Assessed By Investigator in Participants With ESCC Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1 as assessed by the investigator, DOR was defined as the time from first documented evidence of confirmed CR or PR until PD or death due to any cause, whichever occurred first. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. Per protocol, DOR is reported here for all participants of the ITT population (all randomized) who had CR or PR, and who had ESCC and were PD-L1 CPS =10. Up to approximately 34 months
Secondary DOR Per RECIST 1.1 As Assessed By Investigator in Participants With ESCC For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1 as assessed by the investigator, DOR was defined as the time from first documented evidence of confirmed CR or PR until PD or death due to any cause, whichever occurred first. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. Per protocol, DOR is reported here for all participants of the ITT population (all randomized) who had CR or PR, and who had ESCC. Up to approximately 34 months
Secondary DOR Per RECIST 1.1 As Assessed By Investigator in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) For participants who demonstrated a confirmed CR (disappearance of all target lesions) or PR (at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1 as assessed by the investigator, DOR was defined as the time from first documented evidence of confirmed CR or PR until PD or death due to any cause, whichever occurred first. DOR for participants who had not progressed or died at the time of analysis was censored at the date of their last tumor assessment. Per RECIST 1.1, PD was defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of =5 mm. The appearance of one or more new lesions was also considered PD. Per protocol, DOR is reported here for all participants of the ITT population (all randomized) who had CR or PR, and were PD-L1 CPS =10. Up to approximately 34 months
Secondary Number of Participants With an Adverse Event (AE) An AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which did not necessarily have to have a causal relationship with this treatment. An AE could therefore be any unfavourable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a pre-existing condition that was temporally associated with the use of the Sponsor's product was also an AE. The number of participants that experienced at least one AE was reported for each treatment arm. Up to approximately 28 months
Secondary Number of Participants Discontinuing Study Treatment Due to an AE An AE was defined as any untoward medical occurrence in a participant administered a pharmaceutical product and which did not necessarily have to have a causal relationship with this treatment. An AE could therefore be any unfavourable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a pre-existing condition that was temporally associated with the use of the Sponsor's product was also an AE. The number of participants that discontinued any study drug due to an AE was reported for each treatment arm. Up to approximately 27 months
Secondary Change From Baseline To Week 18 in the European Organization for the Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire C30 (QLQ-C30) Global Health Status/Quality of Life (GHS/QoL) Combined Score in All Participants The EORTC-QLQ-C30 is a 30-item questionnaire developed to assess the quality of life of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the Quality of Life (QoL) question "How would you rate your overall quality of life during the past week?" (Item 30) were scored on a 7-point scale (1=Very Poor to 7=Excellent). Using linear transformation, raw scores were standardized so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Per protocol, change from baseline to Week 18 in the GHS/QoL combined score was reported by treatment arm as a pre-specified secondary analysis for all participants. Baseline, Week 18
Secondary Change From Baseline To Week 18 in the EORTC QLQ-C30 GHS/QoL Combined Score in Participants With ESCC Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) The EORTC-QLQ-C30 is a 30-item questionnaire developed to assess the quality of life of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the Quality of Life (QoL) question "How would you rate your overall quality of life during the past week?" (Item 30) were scored on a 7-point scale (1=Very Poor to 7=Excellent). Using linear transformation, raw scores were standardized so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Per protocol, change from baseline to Week 18 in the GHS/QoL combined score was reported by treatment arm as a pre-specified secondary analysis for all participants who had ESCC and who were PD-L1 CPS =10. Baseline, Week 18
Secondary Change From Baseline To Week 18 in the EORTC QLQ-C30 GHS/QoL Combined Score in Participants With ESCC The EORTC-QLQ-C30 is a 30-item questionnaire developed to assess the quality of life of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the Quality of Life (QoL) question "How would you rate your overall quality of life during the past week?" (Item 30) were scored on a 7-point scale (1=Very Poor to 7=Excellent). Using linear transformation, raw scores were standardized so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Per protocol, change from baseline to Week 18 in the GHS/QoL combined score was reported by treatment arm as a pre-specified secondary analysis for all participants who had ESCC. Baseline, Week 18
Secondary Change From Baseline To Week 18 in the EORTC QLQ-C30 GHS/QoL Combined Score in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) The EORTC-QLQ-C30 is a 30-item questionnaire developed to assess the quality of life of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the Quality of Life (QoL) question "How would you rate your overall quality of life during the past week?" (Item 30) were scored on a 7-point scale (1=Very Poor to 7=Excellent). Using linear transformation, raw scores were standardized so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Per protocol, change from baseline to Week 18 in the GHS/QoL combined score was reported by treatment arm as a pre-specified secondary analysis for all participants who were PD-L1 CPS =10. Baseline, Week 18
Secondary Change From Baseline in the EORTC Quality Of Life Questionnaire Oesophageal Module (QLQ-OES18) Subscale Scores in All Participants The EORTC QLQ-OES18 is a disease-specific questionnaire developed and validated to address measurements specific to esophageal cancer and contains 18 items assessing symptoms of dysphagia, pain, reflux symptoms, eating restrictions, anxiety, dry mouth, taste, body image, and hair loss. For the purposes of this study, the Dysphagia subscale (three items), Pain subscale (three items), and Reflux subscale (two items) were evaluated. All subscale items were scored using a four-point Likert scale with the following response choices: 1=not at all, 2=a little, 3=quite a bit, 4=very much. Raw scores for the subscales were standardized into a range of 0 to 100 by linear transformation, with higher symptom scores represent a higher ("worse") level of symptoms. Per protocol, change from baseline to Week 18 in the Dysphagia, Pain, and Reflux subscales was reported for all participants in each treatment arm. Negative changes from baseline indicate a decrease in symptom severity. Baseline, Week 18
Secondary Change From Baseline in the EORTC QLQ-OES18 Subscale Scores in Participants With ESCC Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) The EORTC QLQ-OES18 is a disease-specific questionnaire developed and validated to address measurements specific to esophageal cancer and contains 18 items assessing symptoms of dysphagia, pain, reflux symptoms, eating restrictions, anxiety, dry mouth, taste, body image, and hair loss. For the purposes of this study, the Dysphagia subscale (three items), Pain subscale (three items), and Reflux subscale (two items) were evaluated. All subscale items were scored using a four-point Likert scale with the following response choices: 1=not at all, 2=a little, 3=quite a bit, 4=very much. Raw scores for the subscales were standardized into a range of 0 to 100 by linear transformation, with higher symptom scores representing a higher ("worse") level of symptoms. Change from baseline to Week 18 in the Dysphagia, Pain, and Reflux subscales was reported for participants with ESCC who were PD-L1 CPS=10 in each treatment arm. Negative changes from baseline indicate a decrease in symptom severity. Baseline, Week 18
Secondary Change From Baseline in the EORTC QLQ-OES18 Subscale Scores in Participants With ESCC The EORTC QLQ-OES18 is a disease-specific questionnaire developed and validated to address measurements specific to esophageal cancer and contains 18 items assessing symptoms of dysphagia, pain, reflux symptoms, eating restrictions, anxiety, dry mouth, taste, body image, and hair loss. For the purposes of this study, the Dysphagia subscale (three items), Pain subscale (three items), and Reflux subscale (two items) were evaluated. All subscale items were scored using a four-point Likert scale with the following response choices: 1=not at all, 2=a little, 3=quite a bit, 4=very much. Raw scores for the subscales were standardized into a range of 0 to 100 by linear transformation, with higher symptom scores representing a higher ("worse") level of symptoms. Change from baseline to Week 18 in the Dysphagia, Pain, and Reflux subscales was reported for participants with ESCC in each treatment arm. Negative changes from baseline indicate a decrease in symptom severity. Baseline, Week 18
Secondary Change From Baseline in the EORTC QLQ-OES18 Subscale Scores in Participants Whose Tumors Are PD-L1 Biomarker-Positive (CPS =10) The EORTC QLQ-OES18 is a disease-specific questionnaire developed and validated to address measurements specific to esophageal cancer and contains 18 items assessing symptoms of dysphagia, pain, reflux symptoms, eating restrictions, anxiety, dry mouth, taste, body image, and hair loss. For the purposes of this study, the Dysphagia subscale (three items), Pain subscale (three items), and Reflux subscale (two items) were evaluated. All subscale items were scored using a four-point Likert scale with the following response choices: 1=not at all, 2=a little, 3=quite a bit, 4=very much. Raw scores for the subscales were standardized into a range of 0 to 100 by linear transformation, with higher symptom scores representing a higher ("worse") level of symptoms. Change from baseline to Week 18 in the Dysphagia, Pain, and Reflux subscales was reported for participants who were PD-L1 CPS=10 in each treatment arm. Negative changes from baseline indicate a decrease in symptom severity. Baseline, Week 18
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