| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Patients with histologically or cytologically documented muscle-invasive transitional cell carcinoma (TCC) of the bladder |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Muscle Invasive Bladder Cancer (T2-T4a, N0-1) in stage II and IIIA |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Cancer [C04] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 21.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10005010 |  
| E.1.2 | Term | Bladder cancer stage II |  
| E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |  | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 21.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10005011 |  
| E.1.2 | Term | Bladder cancer stage III |  
| E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |  | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To assess efficacy of investigational product in patients with MIBC using pCR and EFS |  | 
| E.2.2 | Secondary objectives of the trial | 
| To assess efficacy and safety of investigational product in patients with MIBC using the following: 
 EFS, pCR, EFS24
 
 Proportion of patients who achieve <P2
 
 Proportion of subjects with cystectomy
 
 Metastasis-free survival and disease-specific survival
 
 OS
 
 OS at 5 years
 
 DFS
 
 PFS2
 
 Pharmacokinetic and Immunogenicity
 
 Safety and tolerability profile
 |  | 
| E.2.3 | Trial contains a sub-study | Yes | 
| E.2.3.1 | Full title, date and version of each sub-study and their related objectives | 
| Title: Germany biomarker sub-study (A Phase III, Randomized, Open-Label, Multi-Center, Global Study to Determine the Efficacy and Safety of Durvalumab in Combination with Gemcitabine+Cisplatin for Neoadjuvant Treatment Followed by Durvalumab Alone for Adjuvant Treatment in Patients with Muscle-Invasive Bladder Cancer (NIAGARA)) Date and version: Local CSP Germany (Version 2.0) to Global Amendment 2 (Version 3), 03-Jan-2020
 
 Objectives: To investigate the predictive and prognostic value of compositional elements of the MIBC tumor immune microenvironment at baseline and at cystectomy; to investigate the impact and dynamics of intrinsic subtypes and mutational profiles of MIBC with the tumor microenvironment, at baseline and at cystectomy
 |  | 
| E.3 | Principal inclusion criteria | 
| Patient resectable muscle-invasive bladder cancer with clinical stage T2-T4aN0/1M0 with transitional and mixed transitional cell histology; 
 Patients must be planning to undergo a radical cystectomy;
 
 Patients who have not received prior systemic chemotherapy or immunotherapy for treatment of MIBC;
 
 ECOG performance status of 0 or 1 at enrollment.
 
 Availability of tumor sample prior to study entry;
 
 Must have a life expectancy of at least 12 weeks at randomization.
 |  | 
| E.4 | Principal exclusion criteria | 
| Evidence of lymph node (N2-N3) involvement or metastatic (M1) disease at the time of screening. 
 Contra-indication to any of the study drugs
 
 Requires immunosuppression medication for a concomitant condition
 
 Active or prior documented autoimmune or inflammatory disorders
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| Approximately 6 months (pCR) Up to 48 months (EFS)
 |  | 
| E.5.2 | Secondary end point(s) | 
| EFS, pCR, EFS24 
 Proportion of patients who achieve <P2
 
 Proportion of subjects with cystectomy
 
 Metastasis-free survival and disease-specific survival
 
 PFS2
 
 OS
 
 OS at 5 years
 
 DFS
 
 Pharmacokinetic and Immunogenicity
 
 Safety and tolerability profile
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| Approximately 6 months (pCR; Proportion of patients who achieve <P2) Up to 24 months (EFS24)
 Up to 84 months (OS, OS5,  PFS2, DFS, Safety and tolerability profile)
 Up to 48 months (Other endpoints)
 |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | Yes | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | Yes | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | Yes | 
| E.6.13.1 | Other scope of the trial description |  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | Yes | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 3 | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 73 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | Yes | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Chile |  
| Philippines |  
| Taiwan |  
| Australia |  
| Brazil |  
| Canada |  
| Israel |  
| Japan |  
| Korea, Republic of |  
| Russian Federation |  
| Turkey |  
| United Kingdom |  
| United States |  
| Viet Nam |  
| Belgium |  
| Czechia |  
| France |  
| Germany |  
| Italy |  
| Netherlands |  
| Poland |  
| Spain |  | 
| E.8.7 | Trial has a data monitoring committee | Yes | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 5 | 
| E.8.9.1 | In the Member State concerned months | 9 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 5 | 
| E.8.9.2 | In all countries concerned by the trial months | 9 |