A Study of Abatacept in Patients With Active Crohn's Disease

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

The Inflammatory Bowel Disease Questionnaire (IBDQ) consists of a self-administered 32-item questionnaire evaluating quality of life across 4 dimensional scores: Bowel, Systemic, Social and Emotional. Responses to each question can range from 1 to 7, with 1 indicating severe problem and 7 indicating normal health. The total IBDQ is computed as the sum of the responses to the individual IBDQ questions. The total score ranges between 32 to 224 with higher scores indicating a better quality of life. Change from Baseline= post-Baseline - Baseline value.

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. Related AE=relationship of certain, probable, possible, or missing. 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.

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, and opportunistic infections; autoimmune disorders; neoplasms; acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion) and peri-infusional AEs (pre-specified AEs occurring within 24 hours of the start of infusion).

A electrochemiluminescent immunoassay screened sera for drug-specific antibodies, immunocompetition identified specific anti-ABA reactivity. Cytotoxic T-Lymphocyte 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.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

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. Related AE=relationship of certain, probable, possible, or missing. 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.

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, and opportunistic infections; autoimmune disorders; neoplasms; acute infusional AEs (pre-specified AEs occurring within 1 hour of start of infusion) and peri-infusional AEs (pre-specified AEs occurring within 24 hours of the start of infusion).

A electrochemiluminescent immunoassay screened sera for drug-specific antibodies, immunocompetition was used to identify specific anti-Abatacept reactivity. CTLA4 and Possibly 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.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

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.

The Inflammatory Bowel Disease Questionnaire (IBDQ) consists of a self-administered 32-item questionnaire evaluating quality of life across 4 dimensional scores: Bowel, Systemic, Social and Emotional. Responses to each question can range from 1 to 7, with 1 indicating severe problem and 7 indicating normal health. The total IBDQ is computed as the sum of the responses to the individual IBDQ questions. The total score ranges between 32 to 224 with higher scores indicating a better quality of life. Change from Baseline= post-baseline - Baseline value.

Participants who received corticosteroid therapy (e.g. prednisone or budesonide) were to maintain a stable dose until Day MP-1. On or after Day MP-1, a recommended tapering regimen of corticosteroid therapy was planned if the participant was in remission (i.e., CDAI score < 150), or if the participant's condition had satisfactorily improved according to investigators clinical assessment. Other CD therapy was to remain at a stable dose throughout the Maintenance Period, with the exception of decreases due to drug-related toxicities.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score is based partly on entries from participant's Diary (7 days before evaluation) which is kept while on study. CDAI scores range from 0 to ~600. Clinical response=CDAI reduction ≥100 or absolute CDAI <150. Clinical remission=CDAI <150. Moderate to severe disease=CDAI ≥220 and ≤450.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

Background corticosteroid therapy included prednisone or budesonide.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

CDAI is a composite index consisting of a weighted scoring of 8 disease variables:number of liquid stools, extent of abdominal pain, general well-being, occurrence of extraintestinal symptoms, need for antidiarrheal drugs, presence of abdominal masses, hematocrit, and body weight. CDAI score was based partly on entries (7 days before evaluation) from participant's Diary kept while on study. CDAI scores range from 0 to ~600 points. Clinical response=CDAI reduction ≥100 points or absolute CDAI <150 points. Clinical remission=CDAI <150 points. Moderate to severe disease=CDAI ≥220 and ≤450 points.

A electrochemiluminescent immunoassay screened sera for drug-specific antibodies, immunocompetition was used to identify specific anti-Abatacept reactivity. CTLA4 and Possibly 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.

Changes in the expression of individual ribonucleic acid (RNA) transcripts were to be evaluated from whole blood using both microarray transcriptional profiling and quantitative polymerase chain reaction (PCR) methods. Peripheral RNA transcriptional profiling was to be used only to identify individual RNA transcripts that differ in expression with respect to time, treatment and outcome.