| 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  | 
| A form of inflammatory bowel disease | 
 
 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Digestive System Diseases [C06] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 20.0 | 
 
| E.1.2 | Level  | PT | 
 
| E.1.2 | Classification code  | 10011401 | 
 
| E.1.2 | Term  | Crohn's disease | 
 
| E.1.2 | System Organ Class  | 10017947 - Gastrointestinal 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  | 
The objectives of this open-label extension−safety monitoring (OLE-SM) study are as follows:
 Part 1 (Open-Label Extension; OLE)
 • To assess the long-term safety and efficacy of etrolizumab in patients eligible for Part 1 (OLE)
 Part 2 (Safety Monitoring; SM)
 • Progressive multifocal leukoencephalopathy (PML) safety monitoring in patients who have stopped study treatment
 
 Safety Objectives
 The other safety objectives for this study are as follows:
 Part 1 (OLE)
 • To evaluate the incidence, rate per subject-year, and severity of infection-related adverse events
 • To evaluate the incidence and rate per subject-year of malignancies
 • To evaluate the incidence and severity of hypersensitivity reactions
 • To evaluate the incidence and the clinical significance of anti-therapeutic antibodies (ATAs) | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
 | 
| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
Part 1 Open-label Extension:
 -Patients previously enrolled in etrolizumab Phase III study GA29144 who meet the eligibility criteria for open-label etrolizumab as described in the protocol
 
 Part 2 Safety Monitoring:
 -Patients who participated in etrolizumab Phase III study GA29144 and are not eligible or choose not to enter Part 1
 -Patients who transfer from Part 1 
 -Completion of the 12-week safety follow-up in either GA29144 or GA29145, Part 1 (OLE), as applicable,-period prior to entering
 
 | 
 
 
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| E.4 | Principal exclusion criteria | 
Part 1 Open-label Extension:
 -Any new, significant, uncontrolled condition
 
 Part 2 Safety Monitoring:
 -No exclusion criteria
 
 | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
The efficacy outcome measures:
 • CDAI remission assessed at 12-week intervals during Part 1 (OLE)
 • Clinical remission assessed at 12-week intervals during Part 1 (OLE)
 • Simplified Endoscopic Index for Crohn's disease (SES-CD) scoreassessed at Week 108 or at early withdrawal, if prior to Week 108,
 during Part 1 (OLE)
 
 Safety Outcome Measures
 Part 1 (OLE)
 • Incidence and severity of adverse events
 • Incidence of serious adverse events
 • Incidence, rate per subject-year, and severity of infection-related adverse events
 • Incidence of serious infection-related adverse events
 • Incidence and severity of injection-site reactions
 • Incidence of adverse events leading to etrolizumab discontinuation
 • Incidence of laboratory abnormalities
 • Incidence and rate per subject-year of malignancies
 • Incidence of ATAs to etrolizumab
 • Incidence and severity of hypersensitivity reaction events
 
 Part 2 (SM)
 • Incidence of suspected or confirmed PML events | 
 
 
 | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
• CDAI remission assessed at 12-week 
 • Clinical remission assessed at 12-week 
 
 The CDAI and Clinical scores will be calculated, and the APQ (Abdominal Pain Questionnaire) will be completed every 12 weeks and at Study Completion
 • SES-CD at 108 weeks or at early withdrawal
 
 Safety Outcome Measures (Part 1 and 2)
 • Weeks, 0, 4, 8, 12 and then every 12 weeks thereafter | 
 
 
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| E.5.2 | Secondary end point(s) | 
 | 
| 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 |  No  | 
| 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 |  No  | 
| E.8.1.1 | Randomised |  No  | 
| 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 |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  Yes  | 
| E.8.1.7.1 | Other trial design description | 
 | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 1 | 
| 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 | 200 | 
| 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 | 
| Argentina | 
 
| Australia | 
 
| Austria | 
 
| Belgium | 
 
| Brazil | 
 
| Bulgaria | 
 
| Canada | 
 
| Croatia | 
 
| Czech Republic | 
 
| Estonia | 
 
| France | 
 
| Germany | 
 
| Hungary | 
 
| Israel | 
 
| Italy | 
 
| Korea, Republic of | 
 
| Latvia | 
 
| Lithuania | 
 
| Mexico | 
 
| Netherlands | 
 
| New Zealand | 
 
| Poland | 
 
| Romania | 
 
| Russian Federation | 
 
| Serbia | 
 
| Slovakia | 
 
| South Africa | 
 
| Spain | 
 
| Sweden | 
 
| Switzerland | 
 
| Turkey | 
 
| Ukraine | 
 
| United Kingdom | 
 
| United States | 
 
 
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| 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
                     | 
| The end of the study is defined as the date when the last patient completes the 92-week PML safety−monitoring period. | 
 
 
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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 | 7 | 
| E.8.9.1 | In the Member State concerned months |  | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 10 |