| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Sporadic Inclusion Body Myositis | 
 
 
 | 
| E.1.1.1 | Medical condition in easily understood language  | 
| Sporadic Inclusion Body Myositis | 
 
 
 | 
| E.1.1.2 | Therapeutic area  | Diseases [C] - Musculoskeletal Diseases [C05] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 18.1 | 
 
| E.1.2 | Level  | PT | 
 
| E.1.2 | Classification code  | 10066407 | 
 
| E.1.2 | Term  | Inclusion body myositis | 
 
| E.1.2 | System Organ Class  | 10028395 - Musculoskeletal and connective tissue disorders | 
 
 
 | 
| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| To demonstrate that at least one dose regimen of BYM338 will increase the 6 minute walking distance test relative to placebo at week 52. | 
 
 
 | 
| E.2.2 | Secondary objectives of the trial  | 
•Change from Baseline in lean body mass (LBM) at Week 52 
 •Change from Baseline in quadriceps Quantitative Muscle Testing (QMT) at Week 52 
 •Change from Baseline in Patient-Reported Physical Function at Week 52
 •Rate of Fall Events 
 •Change from Baseline in Short Physical Performance Battery score at Week 52 
 •Dose-response relationship in the change from Baseline in 6MWD meters to Week 52 | 
 
 
 | 
| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
•Diagnosed with sporadic inclusion body myositis;
 •Must be able to walk (assistive aids allowed, including intermittent use of wheelchair)
 
 | 
 
 
 | 
| E.4 | Principal exclusion criteria | 
•No other conditions that significantly limit ability to move around;
 •Must not be using corticosteroids. Must not have used systemic corticosteroid (at daily dose >=10mg prednisone) for the past 3 months;
 •Must meet cardiovascular requirements;
 •Must not be pregnant or nursing;
 •Must not have a chronic active infection (e.g., HIV, hepatitis B or C, tuberculosis, etc);
  
 Other protocol-defined inclusion/exclusion criteria may apply
 
 | 
 
 
 | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Change from Baseline in 6 Minute Walking Distance Test (6MWD) meters to Week 52  | 
 
 
 | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
 | 
| E.5.2 | Secondary end point(s) | 
•Change from Baseline in lean body mass (LBM) at Week 52 
 •Change from Baseline in quadriceps Quantitative Muscle Testing (QMT) at Week 52 
 •Change from Baseline in Patient-Reported Physical Function at Week 52
 •Rate of Fall Events 
 •Change from Baseline in Short Physical Performance Battery score at Week 52 
 •Dose-response relationship in the change from Baseline in 6MWD meters to Week 52 | 
 
 
 | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| Week 52 for LBM, QMT, patient-reporter physical function, short physical performance battery and dose-response relationship for 6MWD and measured during entire study for falls , safety and tolerability | 
 
 
 | 
| 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 |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  Yes  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  Yes  | 
| E.6.12 | Pharmacoeconomic |  Yes  | 
| E.6.13 | Others |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
| Tolerability and biomarkers assessments  | 
 
 
 | 
| 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 |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| 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) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 4 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 18 | 
| 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 | 
| Australia | 
 
| Belgium | 
 
| Denmark | 
 
| France | 
 
| Germany | 
 
| Italy | 
 
| Japan | 
 
| Netherlands | 
 
| Poland | 
 
| Switzerland | 
 
| United Kingdom | 
 
| United States | 
 
 
 | 
| 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 | 1 | 
| E.8.9.1 | In the Member State concerned months | 10 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 2 | 
| E.8.9.2 | In all countries concerned by the trial months | 4 |