DB; Adjusted Mean Change From Baseline to Day 197 in Disease Activity Score (DAS) 28 Score (Erythrocyte Sedimentation Rate [ESR]) For ABA Versus PLA (Last Observation Carried Forward [LOCF] Analysis)
The DAS28 is a continuous disease measure which is a composite of 4 variables: the 28 tender joint count, the 28 swollen joint count, ESR or C-reactive protein (CRP), and participant assessment of disease activity measure on a visual analogue scale. The DAS28 has numeric thresholds that define high disease activity (> 5.1), low disease activity (< 3.2) and remission (< 2.6). A clinically significant response is a decrease in DAS28 score of >1.2 from baseline.
OL; Number of Participants With Death, Serious Adverse Events (SAEs), Related SAEs, SAEs Leading to Discontinuation, Adverse Events (AEs), Related AEs, and AEs Leading to Discontinuation
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. SAE=any untoward medical occurrence that at any dose: results in death, is life-threatening, requires inpatient hospitalization or causes prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, results in development of drug dependency or drug abuse, is an important medical event.
OL; Number of Participants With AEs of Special Interest
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. AEs of special interest are those AEs that may be associated with the use of immunomodulatory drugs, including all infections, serious infections, autoimmune disorders; malignancies; and acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion).
OL; Number of Participants With Select Hematologic Laboratory Abnormalities
High=greater than Upper Normal Limit (ULN), Low=lower than Lower Normal Limit (LLN). LLN/ULN= Hemoglobin (HGB): >3 g/dL decrease from Baseline (BL); Hematocrit: <0.75 x BL; Erythrocytes: <0.75 x BL; Platelets (PLT): <0.67 x LLN/>1.5 x ULN; Leukocytes: <0.75 x LLN/ >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; lymphocytes: <0.750 x 10^3 c/uL/ >7.50 x 10^3 c/uL; monocytes: >2000 mm3; eosinophils: >0.750 x 10^3 c/uL;
OL; Number of Participants With Select Blood Chemistry Laboratory Abnormalities
Low=lower than LLN, High=greater than ULN. LLN/ULN= Alkaline phosphatase (ALP): >2 x ULN; aspartate aminotransferase (AST): >3 x ULN; alanine aminotransferase (ALT): >3 x ULN; G-Glutamyl transferase (GGT): >2 x ULN; Bilirubin: >2 x ULN; blood urea nitrogen (BUN): >2 x BL; creatinine: >4 x BL
OL; Mean Change From Baseline to Day 365 in Hemoglobin, Total Protein, and Albumin
Hemoglobin (HGB): >3 g/dL decrease from BL; total protein: < 0.9 x LLN, >1.1 x ULN; albumin:<0.9 x LLN
OL; Mean Change From Baseline to Day 365 in Platelets
Platelets (PLT): <0.67 x LLN, >1.5 x ULN
OL; Mean Change From Baseline to Day 365 in Hematocrit
Hematocrit: <0.75 x BL
OL; Mean Change From Baseline to Day 365 in White Blood Cells
Leukocytes: <0.75 x LLN, >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; eosinophils: >0.750 x 10^3 c/uL; basophils: > 400 mm3; monocytes: >2000 mm3; lymphocytes: <0.750 x 10^3 c/uL, >7.50 x 10^3 c/uL.
OL; Mean Change From Baseline to Day 365 in Erythrocytes
Erythrocytes: <0.75 x BL
OL; Mean Change From Baseline to Day 365 in Electrolytes
Sodium (Na): <0.95 x LLN, >1.05 x ULN; potassium (K): <0.9 x LLN, >1.1 x ULN; chloride (Cl): <0.9 x LLN, >1.1 x ULN
OL; Mean Change From Baseline to Day 365 in Bilirubin, Blood Urea Nitrogen, Creatinine, Calcium, Phosphorous, Serum Glucose, Fasting Serum Glucose, and Uric Acid
Bilirubin: >2 x ULN; blood urea nitrogen (BUN): >2 x BL; creatinine: >4 x BL; calcium (Ca): <0.8 x LLN, >1.2 x ULN; phosphorous (P): <0.75 x LLN, >1.2 5 x ULN; serum glucose (Glu): <65 mg/dL, >220 mg/dL; fasting serum Glu: <0.8 x LLN, >1.5 x ULN; uric acid: >1.5 x ULN;
OL; Mean Change From Baseline to Day 365 in Alanine Aminotransferase, Aspartate Aminotransferase, G-Glutamyl Transferase, and Alkaline Phosphatase
alanine aminotransferase (ALT): >3 x ULN; aspartate aminotransferase (AST): >3 x ULN; G-Glutamyl transferase (GGT): >2 x ULN; Alkaline phosphatase (ALP): >2 x ULN
OL; Mean Change From Baseline to Day 729 in Hemoglobin, Total Protein, and Albumin
Hemoglobin (HGB): >3 g/dL decrease from BL; total protein: < 0.9 x LLN, >1.1 x ULN; albumin:<0.9 x LLN
OL; Mean Change From Baseline to Day 729 in Platelets
Platelets (PLT): <0.67 x LLN, >1.5 x ULN
OL; Mean Change From Baseline to Day 729 in Hematocrit
Hematocrit: <0.75 x BL
OL; Mean Change From Baseline to Day 729 in White Blood Cells
Leukocytes: <0.75 x LLN, >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; eosinophils: >0.750 x 10^3 c/uL; basophils: > 400 mm3; monocytes: >2000 mm3; lymphocytes: <0.750 x 10^3 c/uL, >7.50 x 10^3 c/uL.
OL; Mean Change From Baseline to Day 729 in Erythrocytes
Erythrocytes: <0.75 x BL
OL; Mean Change From Baseline to Day 729 in Electrolytes
Sodium (Na): <0.95 x LLN, >1.05 x ULN; potassium (K): <0.9 x LLN, >1.1 x ULN; chloride (Cl): <0.9 x LLN, >1.1 x ULN
OL; Mean Change From Baseline to Day 729 in Bilirubin, Blood Urea Nitrogen, Creatinine, Calcium, Phosphorous, Serum Glucose, Fasting Serum Glucose, and Uric Acid
Bilirubin: >2 x ULN; blood urea nitrogen (BUN): >2 x BL; creatinine: >4 x BL; calcium (Ca): <0.8 x LLN, >1.2 x ULN; phosphorous (P): <0.75 x LLN, >1.2 5 x ULN; serum glucose (Glu): <65 mg/dL, >220 mg/dL; fasting serum Glu: <0.8 x LLN, >1.5 x ULN; uric acid: >1.5 x ULN;
OL; Mean Change From Baseline to Day 729 in Alanine Aminotransferase, Aspartate Aminotransferase, G-Glutamyl Transferase, and Alkaline Phosphatase
alanine aminotransferase (ALT): >3 x ULN; aspartate aminotransferase (AST): >3 x ULN; G-Glutamyl transferase (GGT): >2 x ULN; Alkaline phosphatase (ALP): >2 x ULN
OL; Mean Change From Baseline to Day 1121 in Hemoglobin, Total Protein, and Albumin
Hemoglobin (HGB): >3 g/dL decrease from BL; total protein: < 0.9 x LLN, >1.1 x ULN; albumin:<0.9 x LLN
OL; Mean Change From Baseline to Day 1121 in Platelets
Platelets (PLT): <0.67 x LLN, >1.5 x ULN
OL; Mean Change From Baseline to Day 1121 in Hematocrit
Hematocrit: <0.75 x BL
OL; Mean Change From Baseline to Day 1121 in White Blood Cells
Leukocytes: <0.75 x LLN, >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; eosinophils: >0.750 x 10^3 c/uL; basophils: > 400 mm3; monocytes: >2000 mm3; lymphocytes: <0.750 x 10^3 c/uL, >7.50 x 10^3 c/uL.
OL; Mean Change From Baseline to Day 1121 in Erythrocytes
Erythrocytes: <0.75 x BL
OL; Mean Change From Baseline to Day 1121 in Electrolytes
Sodium (Na): <0.95 x LLN, >1.05 x ULN; potassium (K): <0.9 x LLN, >1.1 x ULN; chloride (Cl): <0.9 x LLN, >1.1 x ULN
OL; Mean Change From Baseline to Day 1121 in Bilirubin, Blood Urea Nitrogen, Creatinine, Calcium, Phosphorous, Serum Glucose, Fasting Serum Glucose, and Uric Acid
Bilirubin: >2 x ULN; blood urea nitrogen (BUN): >2 x BL; creatinine: >4 x BL; calcium (Ca): <0.8 x LLN, >1.2 x ULN; phosphorous (P): <0.75 x LLN, >1.2 5 x ULN; serum glucose (Glu): <65 mg/dL, >220 mg/dL; fasting serum Glu: <0.8 x LLN, >1.5 x ULN; uric acid: >1.5 x ULN;
OL; Mean Change From Baseline to Day 1121 in Alanine Aminotransferase, Aspartate Aminotransferase, G-Glutamyl Transferase, and Alkaline Phosphatase
alanine aminotransferase (ALT): >3 x ULN; aspartate aminotransferase (AST): >3 x ULN; G-Glutamyl transferase (GGT): >2 x ULN; Alkaline phosphatase (ALP): >2 x ULN
OL; Mean Change From Baseline to Day 1513 in Hemoglobin, Total Protein, and Albumin
Hemoglobin (HGB): >3 g/dL decrease from BL; total protein: < 0.9 x LLN, >1.1 x ULN; albumin:<0.9 x LLN
OL; Mean Change From Baseline to Day 1513 in Platelets
Platelets (PLT): <0.67 x LLN, >1.5 x ULN
OL; Mean Change From Baseline to Day 1513 in Hematocrit
Hematocrit: <0.75 x BL
OL; Mean Change From Baseline to Day 1513 in White Blood Cells
Leukocytes: <0.75 x LLN, >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; eosinophils: >0.750 x 10^3 c/uL; basophils: > 400 mm3; monocytes: >2000 mm3; lymphocytes: <0.750 x 10^3 c/uL, >7.50 x 10^3 c/uL.
OL; Mean Change From Baseline to Day 1513 in Erythrocytes
Erythrocytes: <0.75 x BL
OL; Mean Change From Baseline to Day 1513 in Electrolytes
Sodium (Na): <0.95 x LLN, >1.05 x ULN; potassium (K): <0.9 x LLN, >1.1 x ULN; chloride (Cl): <0.9 x LLN, >1.1 x ULN
OL; Mean Change From Baseline to Day 1513 in Bilirubin, Blood Urea Nitrogen, Creatinine, Calcium, Phosphorous, Serum Glucose, Fasting Serum Glucose, and Uric Acid
Bilirubin: >2 x ULN; blood urea nitrogen (BUN): >2 x BL; creatinine: >4 x BL; calcium (Ca): <0.8 x LLN, >1.2 x ULN; phosphorous (P): <0.75 x LLN, >1.2 5 x ULN; serum glucose (Glu): <65 mg/dL, >220 mg/dL; fasting serum Glu: <0.8 x LLN, >1.5 x ULN; uric acid: >1.5 x ULN;
OL; Mean Change From Baseline to Day 1513 in Alanine Aminotransferase, Aspartate Aminotransferase, G-Glutamyl Transferase, and Alkaline Phosphatase
alanine aminotransferase (ALT): >3 x ULN; aspartate aminotransferase (AST): >3 x ULN; G-Glutamyl transferase (GGT): >2 x ULN; Alkaline phosphatase (ALP): >2 x ULN
OL; Mean Systolic (SBP) and Diastolic (DBP) Blood Pressure During Open Label Period
Seated Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP), units=mm mercury (Hg)
OL; Mean Heart Rate (HR) During Open Label Period
Heart Rate (HR), units=beats per minute (bpm)
OL; Mean Temperature (T) During Open Label Period
Temperature (T), units=degrees Celcius
DB; Adjusted Mean Change From Baseline to Day 197 in DAS 28 Score (ESR) For INF Versus PLA (LOCF Analysis)
The DAS28 is a continuous disease measure which is a composite of 4 variables: the 28 tender joint count, the 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. The DAS28 has numeric thresholds that define high disease activity (> 5.1), low disease activity (< 3.2) and remission (< 2.6). A clinically significant response is a decrease in DAS28 score of >1.2 from baseline.
DB; DAS 28 (ESR) Area Under The Curve (AUC) Over 12 Months For ABA Versus INF
The DAS28 is a continuous disease measure which is a composite of 4 variables: the 28 tender joint count, the 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. The DAS28 has numeric thresholds that define high disease activity (> 5.1), low disease activity (< 3.2) and remission (< 2.6). Clinically significant response= decrease in DAS28 score of >1.2 from baseline. DAS28 AUC can be calculated from the DAS28 score versus time curve, which provides an assessment of changes in disease activity over time.
DB; Percentage of Participants With Clinically Meaningful Health Assessment Questionnaire-Disability Index (HAQ-DI) Response at Day 197
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.
DB; Percentage of Participants With Clinically Meaningful Health Assessment Questionnaire-Disability Index (HAQ-DI) Response at Day 365
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.
DB; Adjusted Mean Change From Baseline to Day 197 in HAQ-DI (LOCF Analysis)
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.
DB; Adjusted Mean Change From Baseline to Day 365 in HAQ-DI (LOCF Analysis)
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.
DB; Adjusted Mean Change From Baseline to Day 197 in SF-36 Physical Component Summary (PCS) and Mental Component Summary (MCS)
The SF-36 is a validated instrument measuring health-related quality of life across multiple disease states. It has 36 questions with 8 subscale scores and 2 summary scores (1) physical component summary=physical functioning, role-physical, bodily pain, and general health; (2) mental component summary=vitality, social functioning, role-emotional, and mental health. There is no total overall score; scoring is done for both subscores and summary scores. For subscores and summary scores, 0 =worst score (or quality of life) and 100=best score. Change from Baseline= post-Baseline - Baseline value.
DB; Adjusted Mean Change From Baseline to Day 365 in SF-36 Physical Component Summary (PCS) and Mental Component Summary (MCS)
The SF-36 is a validated instrument measuring health-related quality of life across multiple disease states. It has 36 questions with 8 subscale scores and 2 summary scores (1) physical component summary=physical functioning, role-physical, bodily pain, and general health; (2) mental component summary=vitality, social functioning, role-emotional, and mental health. There is no total overall score; scoring is done for both subscores and summary scores. For subscores and summary scores, 0 =worst score (or quality of life) and 100=best score. Change from Baseline= post-Baseline - Baseline value.
DB; Percentage of Participants With Good, Moderate, or No Response According to European League Against Rheumatism (EULAR) at Day 365
The DAS28 is a continuous disease measure composite of 4 variables: 28 tender joint count, 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. High disease activity= > 5.1, low disease activity= < 3.2, and remission= < 2.6. Clinically significant response= decrease of >1.2 from baseline. Utilizing EULAR response criteria, DAS28 categorical responses define a good (absolute: <3.2 or >1.2 improvement from baseline [BL]), moderate (absolute: 3.2-5.1 or 0.6-1.2 change from BL), or no response (absolute: >5.1 or <0.6 change from BL)
DB; Percentage of Participants With American College of Rheumatology (ACR) Responses at Day 197
The ACR 20 definition of improvement is a 20% improvement from baseline in the number of tender and swollen joint counts, and a 20% improvement from baseline in 3 of the remaining 5 core set measures: participant global assessment of pain, participant global assessment of disease activity, physician global assessment of disease activity, participant assessment of physical function and acute phase reactant value (C-reactive protein [CRP]). The evaluation for 50% improvement (ACR 50) and 70% improvement (ACR 70) follow similarly.
DB; Percentage of Participants With American College of Rheumatology (ACR) Responses at Day 365
The ACR 20 definition of improvement is a 20% improvement from baseline in the number of tender and swollen joint counts, and a 20% improvement from baseline in 3 of the remaining 5 core set measures: participant global assessment of pain, participant global assessment of disease activity, physician global assessment of disease activity, participant assessment of physical function and acute phase reactant value (C-reactive protein [CRP]). The evaluation for 50% improvement (ACR 50) and 70% improvement (ACR 70) follow similarly.
DB; Number of Participants With Death, Serious Adverse Events (SAEs), Related SAEs, SAEs Leading to Discontinuation, AEs, Related AEs, and AEs Leading to Discontinuation From Day 1 Through Day 197
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. SAE=any untoward medical occurrence that at any dose: results in death, is life-threatening, requires inpatient hospitalization or causes prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, results in development of drug dependency or drug abuse, is an important medical event.
DB; Number of Participants With AEs of Special Interest From Day 1 Through Day 197
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. AEs of special interest are those AEs that may be associated with the use of immunomodulatory drugs, including all infections, serious infections, autoimmune disorders; malignancies; and acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion).
DB; Number of Participants With Death, Serious Adverse Events (SAEs), Related SAEs, SAEs Leading to Discontinuation, AEs, Related AEs, and AEs Leading to Discontinuation From Day 1 Through Day 365
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. SAE=any untoward medical occurrence that at any dose: results in death, is life-threatening, requires inpatient hospitalization or causes prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, results in development of drug dependency or drug abuse, is an important medical event.
DB; Number of Participants With Death, Serious Adverse Events (SAEs), Related SAEs, SAEs Leading to Discontinuation, AEs, Related AEs, and AEs Leading to Discontinuation From Day 198 Through Day 365 in Participants Receiving Placebo Switched to Abatacept
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. SAE=any untoward medical occurrence that at any dose: results in death, is life-threatening, requires inpatient hospitalization or causes prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, results in development of drug dependency or drug abuse, is an important medical event.
DB; Number of Participants With AEs of Special Interest From Day 1 Through Day 365
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. AEs of special interest are those AEs that may be associated with the use of immunomodulatory drugs, including all infections, serious infections, autoimmune disorders; malignancies; and acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion).
DB; Number of Participants With AEs of Special Interest From Day 198 Through Day 365 in Participants Receiving Placebo Switched to Abatacept
AE=any new untoward medical occurrence or worsening of a pre-existing medical condition which does not necessarily have a causal relationship with this treatment. AEs of special interest are those AEs that may be associated with the use of immunomodulatory drugs, including all infections, serious infections, autoimmune disorders; malignancies; and acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion).
DB; Number of Participants With Significant Changes in Mean Systolic and Diastolic Blood Pressure During Days 1 Through 197 and Days 1 Through 365
Seated Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP) were assessed as clinically significant or relevant at the discretion of the Clinical Investigator. Criteria may have varied between institutions.
DB; Number of Participants With Significant Changes in Mean Heart Rate During Days 1 Through 197 and Days 1 Through 365
Heart Rate (HR) was assessed as clinically significant or relevant at the discretion of the Clinical Investigator. Criteria may have varied between institutions.
DB; Number of Participants With Significant Changes in Mean Temperature During Days 1 Through 197 and Days 1 Through 365
Temperature (T) was assessed as clinically significant or relevant at the discretion of the Clinical Investigator. Criteria may have varied between institutions.
DB; Number of Participants With Select Hematologic and Blood Chemistry Laboratory Abnormalities on Days 1 Through 197
High=greater than Upper Normal Limit (ULN), Low=lower than Lower Normal Limit (LLN). LLN/ULN= Hemoglobin (HGB): >3 g/dL decrease from Baseline (BL); Hematocrit: <0.75 x BL; Platelets (PLT): <0.67 x LLN/>1.5 x ULN; Leukocytes: <0.75 x LLN/ >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; aspartate aminotransferase (AST): >3 x ULN; alanine aminotransferase (ALT): >3 x ULN; creatinine: >4 x BL
DB; Number of Participants With Select Hematologic and Blood Chemistry Laboratory Abnormalities on Days 1 Through 365
High=greater than Upper Normal Limit (ULN), Low=lower than Lower Normal Limit (LLN). LLN/ULN= Hemoglobin (HGB): >3 g/dL decrease from Baseline (BL); Hematocrit: <0.75 x BL; Platelets (PLT): <0.67 x LLN/>1.5 x ULN; Leukocytes: <0.75 x LLN/ >1.25 x ULN; neutrophils+bands: <1.0 x 10^3 c/uL; aspartate aminotransferase (AST): >3 x ULN; alanine aminotransferase (ALT): >3 x ULN; creatinine: >4 x BL
DB; Number of Participants With Anti-Abatacept Antibodies From Day 1 Through Day 365 (Electrochemiluminescent [ECL] Immunoassay)
ECL screened sera for drug-specific antibodies, immunocompetition was used to identify specific anti-Abatacept reactivity. Cytotoxic leukocyte antigen 4 (CTLA4) and Possibly Immunoglobulin (Ig) Category=reactivity against extracellular domain of human CTLA4, constant regions of human IgG1, or both (CTLA4Ig; Abatacept molecule). Ig and/or Junction Category=reactivity against constant regions and/or hinge region of human IgG1. Drug-induced seropositivity was defined as a post-baseline titer higher than Baseline, or any post-baseline positivity if Baseline value was missing.
DB; Percentage of Participants With Antibodies Against Infliximab (Human Anti-chimeric Antibody [HACA]) From Day 1 Through Day 365
Infliximab levels were measured using a microplate enzyme-linked immunosorbant assay (ELISA) with infliximab bound to immobilized recombinant tumor necrosis factor (TNF)-alpha. Bound infliximab is detected utilizing a horseradish peroxidase-conjugated anti-human IgG Fc(fragment, crystallizable region)-specific). The enzyme turns over the substrate O-phenlenediamine to a chromogenic product that is measured at 490 nm. The cut-off value was 1.40 ug/mL; this was based on the mean (+ 3 SD) value in serum samples from 40 participants who had never received infliximab.
OL; Mean Change From Baseline Over Time in DAS 28 (ESR) Score
The DAS28 is a continuous disease measure which is a composite of 4 variables: the 28 tender joint count, the 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. The DAS28 has numeric thresholds that define high disease activity (> 5.1), low disease activity (< 3.2) and remission (< 2.6). A clinically significant response is a decrease in DAS28 score of >1.2 from baseline.
OL; Percentage of Participants With DAS28 (ESR) Remission and Low Disease Activity (LDAS) Over Time
The DAS28 is a continuous disease measure which is a composite of 4 variables: the 28 tender joint count, the 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. The DAS28 has numeric thresholds that define high disease activity (> 5.1), low disease activity (< 3.2) and remission (< 2.6). A clinically significant response is a decrease in DAS28 score of >1.2 from baseline.
OL; Percentage of Participants With Good, Moderate, or No Response According to European League Against Rheumatism (EULAR) Over Time
The DAS28 is a continuous disease measure composite of 4 variables: 28 tender joint count, 28 swollen joint count, ESR or CRP, and participant assessment of disease activity measure on a visual analogue scale. High disease activity= > 5.1, low disease activity= < 3.2, and remission= < 2.6. Clinically significant response= decrease of >1.2 from baseline. Utilizing EULAR response criteria, DAS28 categorical responses define a good (absolute <3.2 or >1.2 improvement from baseline [BL]), moderate (absolute 3.2-5.1 or 0.6-1.2 change from BL), or no response (absolute >5.1 or <0.6 change from BL)
OL; Percentage of Participants With American College of Rheumatology (ACR) Responses Over Time
The ACR 20 definition of improvement is a 20% improvement from baseline in the number of tender and swollen joint counts, and a 20% improvement from baseline in 3 of the remaining 5 core set measures: participant global assessment of pain, participant global assessment of disease activity, physician global assessment of disease activity, participant assessment of physical function and acute phase reactant value (C-reactive protein [CRP]). The evaluation for 50% improvement (ACR 50) and 70% improvement (ACR 70) follow similarly.
OL; Percentage of Participants Who Achieved Major Clinical Response
Major Clinical Response was defined as a continuous ACR 70 for six months.
OL; Percentage of Participants With Clinically Meaningful Health Assessment Questionnaire-Disability Index (HAQ-DI) Response Over Time
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.
OL; Adjusted Mean Change From Baseline to Day 729 in HAQ-DI
The disability section of the full HAQ includes 20 questions to assess physical functions in 8 domains: dressing, arising, eating, walking, hygiene, reach, grip and common activities. The questions are evaluated on a 4-point scale: 0=without any difficulty, 1= with some difficulty, 2= with much difficulty, and 3= unable to do. Higher scores= greater dysfunction. A disability index was calculated by summing the worst scores in each domain and dividing by the number of domains answered. Clinically meaningful HAQ response=an improvement of at least 0.3 units from baseline in HAQ disability Index.