BMS-188667 in Children and Adolescents With Juvenile Rheumatoid Arthritis

Time to flare is defined as the elapsed number of days between the first dose date in Period B and the study day that disease flare is confirmed.

All of the following criteria must be met to be defined as a flare:

• > 30% worsening in at least 3 of the 6 JRA/JIA core response variables
• > 30% improvement in not more than 1 of the 6 JRA/JIA core set variables
• ≥ 2 cm of worsening must be present if the Physician or Parent Global Assessment is used to define flare
• worsening in ≥ 2 joints must be present if the number of active joints or joints with limitation of motion is used to define flare based on changes in the surrogate marker, erythrocyte sedimentation rate (ESR)

All of the following criteria must be met to be defined as a flare:

• > 30% worsening in at least 3 of the 6 JRA/JIA core response variables
• > 30% improvement in not more than 1 of the 6 JRA/JIA core set variables
• ≥ 2 cm of worsening must be present if the Physician or Parent Global Assessment is used to define flare
• worsening in ≥ 2 joints must be present if the number of active joints or joints with limitation of motion is used to define flare based on changes in the surrogate marker, erythrocyte sedimentation rate (ESR)

AE=any new unfavorable symptom, sign or disease or worsening of a preexisting condition that may not have a causal relationship with treatment.

SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity or drug dependency/abuse; is life-threatening, an important medical event or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Treatment-related=having certain, probable, possible or missing relationship to study drug. Death=during the study and up to 28 days past study discontinuation. The select AEs were determined using the Medical Dictionary for Regulatory Activities (MedDRA, v14.1).

AE=any new unfavorable symptom, sign or disease or worsening of a preexisting condition that may not have a causal relationship with treatment.

SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity or drug dependency/abuse; is life-threatening, an important medical event or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Treatment-related=having certain, probable, possible or missing relationship to study drug. Death=during the study and up to 28 days past study discontinuation. The select AEs were determined using the Medical Dictionary for Regulatory Activities (MedDRA, v14.1).

AE=any new unfavorable symptom, sign or disease or worsening of a preexisting condition that may not have a causal relationship with treatment. SAE=a medical event that at any dose results in death, persistent or significant disability/incapacity or drug dependency/abuse; is life-threatening, an important medical event or a congenital anomaly/birth defect; or requires or prolongs hospitalization. Treatment-related=having certain, probable, possible or missing relationship to study drug. Death=during the study and up to 85 days past study discontinuation. The select AEs were determined using the Medical Dictionary for Regulatory Activities (MedDRA, v14.1).

Percent change from baseline was calculated from the difference between post-baseline and baseline divided by baseline multiplied by 100 and reported as the range between 25th and 75th percentile, not full range; American College of Rheumatology (ACR) Pediatric 30 JRA/JIA core set variables include active joints, limited range of motion, physician global assessment of disease severity, parent global assessment of overall well-being, change in physical function as measured by the Childhood Health Assessment Questionnaire (CHAQ), erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP). Disease activity was assessed by the physician and parent on a 0-100 mm visual analog scale (VAS). Low values represent low severity of disease and good well-being whereas high values represent highly severe disease and very poor well-being.

Percent change from baseline was calculated from the difference between post-baseline and baseline divided by baseline multiplied by 100 and reported as the range between 25th and 75th percentile, not full range; American College of Rheumatology (ACR) Pediatric 30 JRA/JIA core set variables include active joints, limited range of motion, physician's global assessment of disease severity, parent global assessment of overall well-being, change in physical function as measured by the Childhood Health Assessment Questionnaire (CHAQ), erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP). Disease activity was assessed by the physician and parent on a 0-100 mm visual analog scale (VAS). Low values represent low severity of disease and good well-being whereas high values represent highly severe disease and very poor well-being.

The sponsor prospectively identified categories of AEs that may be associated with the use of immunomodulatory drugs including infections, peri-infusional AEs, autoimmune disorders, malignancies. Peri-infusional AEs are defined as those AEs of special interest occurring during the first 24 hours after the start of study drug infusion. Malignancies definitions were based on events in the MedDRA Maintenance and Support Services Organization (MSSO) malignancies Structured MedDRA Query (SMQ).Autoimmune disorders are in alignment with the pre-specified MedDRA codes of autoimmune disorders events of interest.

The sponsor prospectively identified categories of AEs that may be associated with the use of immunomodulatory drugs including infections, peri-infusional AEs, autoimmune disorders, malignancies. Peri-infusional AEs are defined as those AEs of special interest occurring during the first 24 hours after the start of study drug infusion. Malignancies definitions were based on events in the MedDRA Maintenance and Support Services Organization (MSSO) malignancies Structured MedDRA Query (SMQ).Autoimmune disorders are in alignment with the pre-specified MedDRA codes of autoimmune disorders events of interest.

The sponsor prospectively identified categories of AEs that may be associated with the use of immunomodulatory drugs including infections, peri-infusional AEs, autoimmune disorders, malignancies. Peri-infusional AEs are defined as those AEs of special interest occurring during the first 24 hours after the start of study drug infusion. Malignancies definitions were based on events in the MedDRA Maintenance and Support Services Organization (MSSO) malignancies Structured MedDRA Query (SMQ).Autoimmune disorders are in alignment with the pre-specified MedDRA codes of autoimmune disorders events of interest.

The ACRP30 response criteria were defined as a ≥ 30% improvement over baseline in ESR. ACRP 50, 70, and 90 responses were defined similarly with 50%, 70%, and 90% improvements required, respectively.

Marked abnormalities were pre-defined as changes in lab tests that occurred after drug infusion and were reported relative to the normal range for each analyte. Hemoglobin, 11.6-14.8 grams per deciliter (g/dL);Hematocrit, 36.0-50.0 percent;Erythrocytes, 3.80-5.10x10*6 cells per microliter (c/uL);Platelets, 140-44 cells per liter (c/L);Leukocytes, 4.00-12.50 c/uL;Absolute Neutrophils + Bands, if <1.00x10^3 c/uL;Absolute Lymphocytes, if <0.72x10^3 or >7.50x10^3 c/uL;Absolute Eosinophils, if >0.750X10^3 c/uL;Alanine Aminotransferase, 0-40 units per liter (U/L);G-Glutamyl Transferase, 0-60 U/L;Bilirubin, 0.1-1.2 milligrams per deciliter (mg/dL);Blood Urea Nitrogen, 5.9-26.0 mg/dL;Creatinine, 0.50-1.50 mg/dL;Serum Potassium, 3.5-5.5 milliequivalents per liter (mEq/L);Serum Glucose, 65-99 mg/dL;Fasting Serum Glucose, 65-99 mg/dL;Total Protein, 6.0-8.5 g/dL;Albumin, 3.5-5.5 g/dL;Urine Protein, >=4;Urine Glucose, >=4;Urine Blood, >=4;Urine Red Blood Cells >=4;Urine White Blood Cells, >=4.

Marked abnormalities were pre-defined as changes in lab tests that occurred after drug infusion and were reported relative to the normal range for each analyte. Hemoglobin, 11.6-14.8 grams per deciliter (g/dL);Hematocrit, 36.0-50.0 percent;Erythrocytes, 3.80-5.10x10*6 cells per microliter (c/uL);Platelets, 140-44 cells per liter (c/L);Leukocytes, 4.00-12.50 c/uL;Absolute Neutrophils + Bands, if <1.00x10^3 c/uL;Absolute Lymphocytes, if <0.72x10^3 or >7.50x10^3 c/uL;Absolute Eosinophils, if >0.750X10^3 c/uL;Aspartate Aminotransferase, 0-40 units per liter (U/L); Alanine Aminotransferase, 0-40 U/L;Blood Urea Nitrogen, 5.9-26.0 mg/dL;Serum Sodium, 135-148 milliequivalents per liter (mEq/L);Serum Potassium, 3.5-5.5 mEq/L;Serum Glucose, 65-99 mg/dL;Fasting Serum Glucose, 65-99 mg/dL;Urine Protein, >=4;Urine Blood, >=4;Urine Red Blood Cells >=4;Urine White Blood Cells, >=4.

Marked abnormalities were pre-defined as changes in lab tests after drug infusion and relative to normal range. Hemoglobin,11.6-14.8grams per deciliter(g/dL);Hematocrit,36.0-50.0 percent;Erythrocytes,3.80-5.10x10*6 cells per microliter(c/uL);Platelets,140-44 cells per liter(c/L);Leukocytes,4.00-12.50c/uL;Absolute(Abs)Neutrophils+Bands,<1.00x10^3 c/uL;Abs Lymphocytes,<0.72x10^3 or>7.50x10^3 c/uL;Abs Eosinophils,>0.750X10^3 c/uL;Alkaline Phosphatase,0-40 units per liter(U/L);Aspartate Aminotransferase,0-40 U/L;Alanine Aminotransferase,0-40U/L;G-Glutamyl Transferase,0-60 U/L;Bilirubin, 0.1-1.2 milligrams per deciliter(mg/dL);Blood Urea Nitrogen,5.9-26.0 mg/dL;Creatinine, 0.50-1.50mg/dL;Inorganic Phosphorus,2.8-6.2 U/L;Serum Potassium,3.5-5.5 milliequivalents per liter(mEq/L);Serum Glucose,65-99 mg/dL;Fasting Serum Glucose,65-99 mg/dL;Total Protein, 6.0-8.5 g/dL;Albumin,3.5-5.5 g/dL;Urine Protein,>=4;Urine Glucose,>=4;Urine Blood,>=4;Urine Red Blood Cells>=4;Urine White Blood Cells,>=4.

During Period C, blood samples for immunogenicity assessments were obtained just prior to the start of the IV infusion of abatacept at 3-month intervals during the first 2 years of Period C, at 6-month intervals thereafter, and again 28, 56, and 85 days after the last infusion. Direct-format, enzyme-linked immunosorbent assays (ELISAs) were used to evaluate the cytotoxic T-lymphocyte antigen 4 (CTLA4) and the anti-CTLA4-T antibody.