A Study of RoActemra/Actemra (Tocilizumab) in Patients With Active Systemic Juvenile Idiopathic Arthritis (JIA)

Part I: Percentage of Participants With JIA Core Set ACR 30/50/70/90 Response at Week 12

The six JIA ACR components consist of: 1) Physician's global assessment of disease activity, 2) Parent/Patient global assessment of overall well-being, 3) Maximum number of joints with active arthritis, 4) Number of joints with limitation of movement, 5) Erythrocyte Sedimentation Rate, and 6) CHAQ-DI. At an assessment visit a JIA ACR30/50/70/90 response in comparison to Baseline is defined as: At least three of the six JIA ACR core components improving by at least 30%/50%/70%/90% and no more than one of the remaining JIA ACR core components worsening by more than 30%.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Physician's Global Assessment of Disease Activity

Physician's Global Assessment of disease activity is a Visual Analog Scale. The scale is 0 to 100 mm horizontal scale, the extreme left end of the line represents 'arthritis inactive' (i.e. symptom-free and no arthritis symptoms) and the extreme right end represents 'arthritis very active'. This item is completed by the treating physician.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Parent/Patient Global Assessment of Overall Well-being

The Parent/Patient global assessment of overall well-being is a VAS. The scale is a 0 to 100 mm horizontal scale, the extreme left end of the line represents 'very well' (i.e. symptom-free and no arthritis disease activity) and the extreme right end represents 'very poor' (i.e. maximum arthritis disease activity). This item is completed by the patient or parent/guardian as appropriate.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Maximum Number of Joints With Active Arthritis

The maximum number of joints with active arthritis is 71 and these are defined as those in the joint assessment with: swelling present or pain present and limitation of motion. The joint assessment is performed by an independent assessor, who is not the treating physician, blinded to all other aspects of the patient's efficacy and safety data.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Number of Joints With Limitation of Movement

The maximum number of joints with limitation of movement is 67 and these are defined as those in the joint assessment with 'limitation of motion'.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Erythrocyte Sedimentation Rate

Erythrocyte Sedimentation Rate (ESR) is an acute phase reactant measured in mm/hour.

Time frame: Baseline, Week 12

Part I: Percentage Change From Baseline in JIA Core Set ACR Score Component: Childhood Health Assessment Questionnaire Disability Index (CHAQ-DI)

Functional ability is assessed using the CHAQ-DI. The questionnaire consists of 30 questions referring to eight domains; dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities. Each domain has at least two component questions and if applicable to the patient there are four possible responses (0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, 3 = unable to do). The CHAQ-DI score is the sum of the domain scores divided by the number of domains that have a non-missing score. This overall score ranges from 0 (best) to 3 (worst).

Time frame: Baseline, Week 12

Part I: Percentage of Participants With Fever Due to Systemic Juvenile Idiopathic Arthritis (sJIA) at Baseline Who Are Free of Fever at Week 12

Fever free was defined as no diary temperature recording ≥37.5° Celsius in the preceding fourteen days.

Time frame: Baseline, Week 12

Part I: Percentage of Participants With Changes in Laboratory Indicators: High-sensitivity C-Reactive Protein(hsCRP), Hemoglobin (Hb), Platelets and Leukocytes From Abnormal at Baseline to Normal at Week 12

Percentage of participants with a change from an elevated hsCRP value at baseline to a normal hsCRP value at week 12; a change from anemia (low Hemoglobin) at baseline to a normal hemoglobin value at week 12; a change from thrombocytosis (elevated platelets) at baseline to a normal platelet value at week 12; a change from leukocytosis (elevated white blood cell count) at baseline to a normal white blood cell count at week 12.

Time frame: Baseline, Week 12

Part I: Percentage of Participants With Concomitant Corticosteroid Reduction

The percentage of participants receiving oral corticosteroids(CS) with a JIA ACR70 response at week 6 or Week 8 who reduced their oral CS dose by at least 20% without subsequent JIA ACR30 flare or occurrence of systemic symptoms at week 12. At an assessment visit a JIA ACR70 response is defined as: At least three of the six JIA ACR core components improving by at least 70% and no more than one of the remaining JIA ACR core components worsening by more than 30%.

Time frame: Week 6 or Week 8, Week 12

Part I: Change From Baseline in the Pain Visual Analog Scale (VAS) at Week 12

Participants rated their pain by placing a horizontal line on a Visual Analog Scale on a scale of 0 (no pain)- 100 mm (severe pain). The score at 12 weeks minus the score at baseline. A negative number indicates improvement.

Time frame: Baseline, Week 12

Part I: Percentage of Patients With Minimally Important Improvement in CHAQ-DI Score at Week 12

Percentage of patients who had at least a 0.13 improvement in CHAQ-DI score from Baseline to Week 12. The CHAQ-DI questionnaire consists of 30 questions referring to eight domains; dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities. Each domain has at least two component questions and if applicable to the patient there are four possible responses (0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, 3 = unable to do).

Time frame: Baseline, Week 12

Part I: Percentage of Patients With Rash at Baseline Who Are Free From Rash at Week 12

Percentage of participants who had a rash characteristic of sJIA in the 14 days prior to the baseline visit but no rash characteristic of sJIA in the 14 days preceding the Week 12 visit day.

Time frame: Baseline, Week 12

Part I: Percentage of Patients With Anemia at Baseline With a ≥10 g/L Increase in Hemoglobin at Week 6 and Week 12

Part I: Percentage of patients who had anemia (hemoglobin \<lower level normal based on sex and age) at Baseline and a ≥10 g/L increase in hemoglobin at Week 6 and at Week 12.

Time frame: Baseline, Week 6 and Week 12

Part II: Percentage of Participants With JIA ACR70 and JIA ACR90 Responses Week 104

The six JIA ACR components consist of: 1)Physician's global assessment of disease activity, 2)Parent/Patient global assessment of overall well-being, 3) Maximum number of joints with active arthritis, 4) Number of joints with limitation of movement, 5) Erythrocyte Sedimentation Rate, and 6) CHAQ-DI. At an assessment visit a JIA ACR70/90 response in comparison to Baseline is defined as: At least three of the six JIA ACR core components improving by at least 70%/90% and no more than one of the remaining JIA ACR core components worsening by more than 30%.

Time frame: Baseline, Week 104

Part II: Number of Active Joints at Week 104

Seventy-one joints were assessed for signs of active arthritis. The mean number of joints with signs of active arthritis is reported.

Time frame: Week 104

Part II: Percentage of Participants With no Active Joints at Week 104

Seventy-one joints were assessed for signs of active arthritis. The percentage of participants with no signs of active arthritis is reported.

Time frame: Week 104

Part II: Percentage of Participants With Inactive Disease at Week 104

Criteria for Inactive Disease: 1\) No joints with active arthritis, 2) No fever, rash, serositis, splenomegaly, hepatomegaly (by physical exam) or generalized lymphadenopathy attributable to systemic juvenile idiopathic arthritis (sJIA), 3) Normal Erythrocyte Sedimentation Rate (\<20 mm/hour), 4) Physician's global assessment of disease activity Visual Analog Scale (VAS) indicates no disease activity (where no disease activity is considered to be a score ≤10 mm on a 100 mm VAS).

Time frame: Week 104

Part II: Childhood Health Assessment Questionnaire-Disability Index (CHAQ-DI) Score at Week 104

Functional ability is assessed using the CHAQ-DI. The questionnaire consists of 30 questions referring to eight domains; dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities. Each domain has at least two component questions and if applicable to the patient there are four possible responses (0 = without any difficulty, 1 = with some difficulty, 2 = with much difficulty, 3 = unable to do). The CHAQ-DI score is the sum of the domain scores divided by the number of domains that have a non-missing score. This overall score ranges from 0 (best) to 3 (worst).

Time frame: Baseline, Week 104

Part II: Percentage of Participants With Oral Corticosteroid Cessation at Week 104

Percentage is based on only those participants who were on oral corticosteroid at baseline and reached a nominal visit day on which dose was calculated.

Time frame: Baseline, Week 104

Part II: Rate of Serious Adverse Events (SAEs), Serious Infection Adverse Events (AEs), Related SAEs, Macrophage Activation Syndrome, AEs Leading to Withdrawal and Deaths Per 100 Patient Years to Week 104

Rate of SAEs, Rate of Serious Infection AEs, Rate of Related SAEs (remotely, possibly, probably) to Tocilizumab (TCZ), Rate of Macrophage Activation Syndrome, Rate of AEs leading to withdrawal and Rate of deaths per 100 patient years (PY) were calculated using the formula: Number of Patient Events / Duration in study (years) \* 100. Multiple occurrences of the same AE in one individual are counted.

Time frame: 104 Weeks

Part III: Percentage of Participants With at Least 30%, 50%, 70%, and 90% Improvement in JIA Core Set According to ACR

Percentage of participants with ≥30%, 50%, 70%, and 90% improvement in ACR core set consisting of 6 components: 1) Physician's global assessment of disease activity VAS, 2) Parent/Patient global assessment of overall well-being VAS, 3) Maximum number of joints with active arthritis, 4) Number of joints with limitation of movement, 5) Erythrocyte Sedimentation Rate, and 6) CHAQ-DI consisting of 30 questions in 8 domains.

Time frame: Weeks 104, 116, 128, 140, 152, 164, 176, 188, 200, 212, 224, 236, 248 and 260

Part III: Percentage of Participants Who Maintain JIA ACR30, JIA ACR50, JIA ACR70, JIA ACR90 Response for 6 Months Previous to the Specified Week

JIA ACR core set consisting of 6 components: 1) Physician's global assessment of disease activity VAS, 2) Parent/Patient global assessment of overall well-being VAS, 3) Maximum number of joints with active arthritis, 4) Number of joints with limitation of movement, 5) Erythrocyte Sedimentation Rate, and 6) CHAQ-DI consisting of 30 questions in 8 domains.

Time frame: Weeks 104, 116, 128, 140, 152, 164, 176, 188, 200, 212, 224, 236, 248 and 260

Part III: Doses of Oral Corticosteroids

Oral corticosteroid values summarized are based on average daily dose on the nominal study day. The prednisone equivalent is used in calculation of oral corticosteroid dose. Participants who withdrew are excluded at the the visit of withdrawal and all subsequent visits.

Time frame: Baseline and Weeks 104, 116, 128, 140, 152, 164, 176, 188, 200, 212, 224, 236, 248 and 260

Part III: Percentage of Participants on Corticosteroids at Baseline Able to Discontinue Corticosteroids by Weeks 104,116, 128, 140, 152, 164, 176, 188, 200, 212, 224, 236, 248, and 260

Values summarized are based on average daily dose on the nominal study day. The prednisone equivalent is used in calculation of oral corticosteroid dose. Participants who withdrew are excluded at the timepoint of this event and at all subsequent visits. Baseline considered first dose of study treatment. Data presented up to entry into the Alternative Dosing Schedule.

Time frame: Weeks 104,116, 128, 140, 152, 164, 176, 188, 200, 212, 224, 236, 248, and 260

Part III: Percentage of Participants With a >=20/50/75/90% Decrease From Baseline in Oral Corticosteroid Dose at Visits

Values summarized are based on average daily dose on the nominal study day. The prednisone equivalent is used in calculation of oral corticosteroid dose. Participants who withdrew are excluded at the timepoint of this event and at all subsequent visits. Baseline considered first dose of study treatment.

Time frame: Every 2 weeks from Week 104 to Week 260

Part III: Percentage of Participants With Inactive Disease

Participants who previously withdrew are excluded. Responders are participants who met all of the following criteria for inactive disease at the visit assessment day: i. Number of active joints = 0. ii. Absence of lymphadenopathy, hepatomegaly or splenomegaly in the nearest non-missing physical examination prior to or after the week assessment day. This could include results outside of the time window. iii. Absence of symptomatic serositis adverse event. iv. In the 14 days preceding the week assessment day no fever (temperature \>=37.5 C) or rash characteristic of sJIA. v. Normal ESR as defined by an ESR \<20 mm/hr regardless of age and sex. vi. Physician global assessment VAS \<=10. LOCF rule applied to missing number of active joints, ESR and Physician global assessment VAS. Data presented up to the point of entry into the Alternative Dosing Schedule.

Time frame: Weeks 104, 116, 128, 140, 152, 164, 188, 200, 212, 224,236,248 and 260

Part III: Percentage of Participants in Clinical Remission

Patients who previously withdrew are excluded Responders are patients who met all of the following criteria for inactive disease at all visits in the 6 months (180 days) prior to and including the visit assessment day: i. Number of active joints = 0. ii. Absence of lymphadenopathy, hepatomegaly or splenomegaly in the nearest non-missing physical examination prior to or after the week assessment day. This could include results outside of the time window. iii. Absence of symptomatic serositis adverse event. iv. In the 14 days preceding the week assessment day no fever (temperature \>=37.5 C) or rash characteristic of sJIA. v. Normal ESR as defined by an ESR \<20 mm/hr regardless of age and sex. vi. iv. Physician global assessment VAS \<=10. LOCF rule applied to missing number of active joints, ESR and Physician global assessment VAS. ESR = Erythrocyte Sedimentation Rate. VAS = Visual Analogue Scale. Data presented up to the point of entry into the Alternative Dosing Schedule.

Time frame: Weeks 116, 128, 140, 152, 164, 188, 200, 212, 224,236,248 and 260

Part III: Percentage of Participants on Corticosteroids at Baseline in Clinical Remission Off All Oral Corticosteroids for 6 Months Prior to Specified Visits

There were 4 levels of clinical remission defined while the patient remained on tocilizumab as defined below.. After level 1, each successive level required that all the previous level criteria be met: Level 1: inactive disease criteria have been met at all assessments in the last 6 months (180 days) preceding the timepoint assessment day Level 2: level 1 criteria and no oral corticosteroids received in the last 6 months (180 days) preceding the timepoint assessment day Level 3: level 2 criteria and no methotrexate received in the last 6 months (180 days) preceding the timepoint assessment day Level 4: level 3 criteria and no NSAIDs received for sJIA in the last 6 months (180 days) preceding the timepoint assessment day

Time frame: Weeks 116, 128, 140, 152, 164, 188, 200, 212, 224,236,248 and 260

Part III: Percentage of Participants on Methotrexate At Baseline in Clinical Remission Off Corticosteroids and Methotrexate for 6 Months Prior to Specified Visits

There were 4 levels of clinical remission defined while the patient remained on tocilizumab as defined below.. After level 1, each successive level required that all the previous level criteria be met: Level 1: inactive disease criteria have been met at all assessments in the last 6 months (180 days) preceding the timepoint assessment day Level 2: level 1 criteria and no oral corticosteroids received in the last 6 months (180 days) preceding the timepoint assessment day Level 3: level 2 criteria and no methotrexate received in the last 6 months (180 days) preceding the timepoint assessment day Level 4: level 3 criteria and no NSAIDs received for sJIA in the last 6 months (180 days) preceding the timepoint assessment day

Time frame: Weeks 116, 128, 140, 152, 164, 188, 200, 212, 224,236,248 and 260

Part III: Percentage of Participants in Clinical Remission Off All Arthritis Medications Except Tocilizumab for 6 Months Prior to Specified Visits

There were 4 levels of clinical remission defined while the patient remained on tocilizumab as defined below.. After level 1, each successive level required that all the previous level criteria be met: Level 1: inactive disease criteria have been met at all assessments in the last 6 months (180 days) preceding the timepoint assessment day Level 2: level 1 criteria and no oral corticosteroids received in the last 6 months (180 days) preceding the timepoint assessment day Level 3: level 2 criteria and no methotrexate received in the last 6 months (180 days) preceding the timepoint assessment day Level 4: level 3 criteria and no NSAIDs received for sJIA in the last 6 months (180 days) preceding the timepoint assessment day

Time frame: Weeks 116, 128, 140, 152, 164, 188, 200, 212, 224,236,248 and 260

Part III: Percentage of Participants Who Developed Antibodies To Tocilizumab During Weeks 104 to 260

Human antibodies against human antibodies (HAHA), anti-tocilizumab antibodies were assessed by immunogenicity techniques from blood samples drawn every two weeks during Part III of the study.

Time frame: Every 2 weeks from Week 104 to 260

Part III: Percentage of Participants Who Developed Anti-TCZ Antibodies Associated With The Occurrence of Drug Hypersensitivity Reactions.

Human antibodies against human antibodies (HAHA), anti-tocilizumab antibodies were assessed by immunogenicity techniques from blood samples drawn every two weeks during Part III of the study.

Time frame: Every 2 weeks from Week 104 to 260