| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Polymyalgia rheumatica |  
| Spierreuma |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] | 
| 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 | 10036099 |  
| E.1.2 | Term | Polymyalgia rheumatica |  
| E.1.2 | System Organ Class | 10028395 - Musculoskeletal and connective tissue disorders |  | 
| 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 study the efficacy of RTX 1*1000mg, with possibility of retreatment between 24-52 weeks compared to placebo on achieving GC free remission after 52 weeks in newly diagnosed PMR patients during accelerated GC tapering. |  | 
| E.2.2 | Secondary objectives of the trial | 
| Secondary study parameters include between group difference in proportion of patients in GC-free remission at week 21, the proportion of patients with low dose GC (≤5mg/day) remission at week 21 and 52, difference in PMR-AS, the number of disease relapses/recurrences at week 52, time to GC-free remission and to relapse, GC cumulative dose during the trial, and the proportion of patients with RTX/PCB retreatment, sex differences in frequencies of GC-remission and safety, change in Patient Reported Outcomes (PROMs) , the frequency and types of GC- and RTX-related AE, change in the modified Glucocorticoid Toxicity Index (GTI) and cost-effectiveness. |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| •	Newly diagnosed PMR (<12 weeks) according to the 2012 EULAR/ACR classification criteria. •	Glucocorticoid treatment ≤ 8 weeks
 •	Glucocorticoid dose equivalent of prednisolone ≤30 mg/day.
 |  | 
| E.4 | Principal exclusion criteria | 
| •	Treatment with systemic immunosuppressants (other than GC, MTX, leflunomide and azathioprine) ≤3 months prior to inclusion •	(clinical) suspect concomitant giant cell arteritis or other rheumatic inflammatory disease
 •	Concomitant conditions that might significantly interfere with evaluation of PMR pain or movement as judged by the investigator
 •	Previous hypersensitivity for RTX of contra-indications to RTX
 •	Not being able to speak, read or write Dutch
 
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The percentage of newly diagnosed PMR patients in GC-free remission |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| Between group differences in: •	Proportion of patients in GC free remission at week 21
 •	Proportion of patients with low dose GC (≤5mg/day) remission at week 21 and 52
 •	PMR-AS at each visit
 •	The number of disease relapses/recurrences up to week 52
 •	The proportion of patients with a disease relapse/recurrence at week 52
 •	The time from baseline to GC free remission and to relapse
 •	GC cumulative dose at 52 weeks.
 •	Proportion of patients with RTX/PCB retreatment
 •	Proportion of patients who start methotrexate or leflunomide.
 •	Sex differences in frequencies of GC-remission and adverse events.
 •	Changes in patient reported outcomes, concerning pain, fatigue, stiffness and physical function (as recommended by the OMERACT).
 •	Medical consumption and productivity loss
 •	(Changes in) modified glucocorticoid toxicity index (which excludes bone mineral density scan to improve feasibility).
 •	Frequency, types, proportion of patients with, and total numbers of ( especially GC- and RTX-related) AE during the 52 week study.
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| 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 | No | 
| E.6.7 | Pharmacodynamic | No | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| 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 | No | 
| 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 | 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 | 6 | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| 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 | 2 | 
| E.8.9.1 | In the Member State concerned months | 3 | 
| E.8.9.1 | In the Member State concerned days |  |