| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP)
 
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| E.1.1.1 | Medical condition in easily understood language  | 
Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a rare immune-mediated disorder of the peripheral nerves.
 
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| 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  | 21.1 | 
 
| E.1.2 | Level  | PT | 
 
| E.1.2 | Classification code  | 10057645 | 
 
| E.1.2 | Term  | Chronic inflammatory demyelinating polyradiculoneuropathy | 
 
| E.1.2 | System Organ Class  | 10029205 - Nervous system disorders | 
 
 
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| 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 evaluate the clinical efficacy of rozanolixizumab as a treatment for subjects with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP)
 
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| E.2.2 | Secondary objectives of the trial  | 
- To evaluate the safety and tolerability of rozanolixizumab in subjects with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP)
 - To assess the pharmacodynamic (PD) effect of rozanolixizumab as measured by the total immunoglobulin G (IgG) concentrations in serum | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- Subject is ≥ 18 years of age at Visit 1 (Screening)
 - Subject has a documented definite or probable diagnosis of Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP) according to the European Federation of Neurological Societies (EFNS)/ Peripheral Nerve Society (PNS) criteria 2010
 - Subject has an immunoglobulin-dependency confirmed by clinical examination during therapy or upon interruption or reduction of therapy within 18 months prior to Screening and documented in medical history
 - Subject is on a stable dosage (not more than ±20% deviation) for subcutaneous immunoglobulin (SCIg) or intravenous immunoglobulin (IVIg) and a fixed interval for at least 4 months of either treatment
 - Female subjects of childbearing potential must agree to use a highly effective method of birth control, during the study and for a period of 3 months after their final dose of IMP
 - Male subjects with a partner of childbearing potential must be willing to use a condom when sexually active during the study and for 3 months after the final administration of IMP | 
 
 
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| E.4 | Principal exclusion criteria | 
- Previously received treatment in this study or subject has previously been exposed to rozanolixizumab
 - Current diagnosis or has a history of Type 1 or Type 2 diabetes mellitus and/or hemoglobin A1c level >6.0%
 - Known immunoglobulin M (IgM)-mediated neuropathy
 - Clinical or known evidence of associated systemic diseases that might cause neuropathy or treatment with agents that might lead to neuropathy
 - History of clinically relevant ongoing chronic infections
 - Family history of primary immunodeficiency
 - Received a live vaccination within 8 weeks prior to the Baseline Visit; or intends to have a live vaccination during the course of the study or within 7 weeks following the final dose of IMP
 - Received any experimental biological agent within or outside of a clinical study in the past 3 months or within 5 half-lives prior to Baseline
 - Prior treatment with rituximab, ofatumumab, or ocrelizumab in the 6 months prior to the Baseline Visit or subject has had prior treatment with rituximab, ofatumumab, or ocrelizumab in the 12 months prior to Baseline and B cells are not within the normal range
 - Female subject who is pregnant or lactating | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
Change from Baseline to Week 13 (Day 85) in inflammatory Rasch-built Overall Disability Scale (iRODS) score
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| From Baseline up to Week 13 (Day 85) | 
 
 
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| E.5.2 | Secondary end point(s) | 
| No secondary end points are defined. | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| No secondary end points are defined. | 
 
 
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| 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 |  No  | 
| E.6.10 | Pharmacogenetic |  Yes  | 
| E.6.11 | Pharmacogenomic |  Yes  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
| Tolerability and Immunogenicity | 
 
 
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| 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) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| 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 | 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 | 2 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 14 | 
| 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 | 
| Belgium | 
 
| Canada | 
 
| Denmark | 
 
| France | 
 
| Germany | 
 
| Italy | 
 
| Netherlands | 
 
| Spain | 
 
| United Kingdom | 
 
| United States | 
 
 
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| 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
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| Last Subject Last Visit (LSLV) | 
 
 
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| 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 | 6 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 6 | 
| E.8.9.2 | In all countries concerned by the trial days | 15 |