Study to Evaluate Efficacy and Safety of Two Drug Regimens in Subjects With Moderate to Severe Crohn's Disease

Adverse event (AE): any untoward medical occurrence that does not necessarily have a causal relationship with this treatment. The investigator assessed the relationship of each event to the use of study drug as either probably related, possibly related, probably not related or not related. Serious AE (SAE) is an event that results in death, is life-threatening, requires or prolongs hospitalization, results in a congenital anomaly, persistent or significant disability/incapacity or is an important medical event that, based on medical judgment, may jeopardize the subject and may require medical or surgical intervention to prevent any of the outcomes listed above. TEAEs: any event that began or worsened in severity after the first dose of study drug in the induction or maintenance study. Events with unknown severity were counted as severe. Events with unknown relationship to study drug were counted as drug-related.

Time frame: From first dose of study drug until 70 days following last dose of study drug in the induction study (up to 12 weeks) or maintenance study (up to 56 weeks).

Population: Safety Set: all participants who received at least one injection of study drug.

Crohn's Disease Activity Index (CDAI) is used to assess the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450.

Time frame: Week 4

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Endoscopic response was scored using the Simplified Endoscopic Score for Crohn's Disease (SES-CD). The SES-CD evaluates 4 endoscopic variables (ulcer size ranging from 0 \[none\] to 3 \[very large\]; ulcerated surface ranging from 0 \[none\] to 3 \[\>30%\]; affected surface ranging from 0 \[none\] to 3 \[\>75%\], and narrowing ranging from 0 \[none\] to 3 \[cannot be passed\]) in 5 segments assessed during ileocolonoscopy (ileum, right colon, transverse colon, sigmoid and left colon, and rectum). The total score is the sum of the 4 endoscopic variable scores and range from 0 to 56, where higher scores indicate more severe disease. Endoscopic response was defined as SES-CD total score \> 50% from Baseline (or for a Baseline SES-CD of 4, at least a 2 point reduction from Baseline) at Week 12.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Time frame: Baseline, Week 4

Population: Intent to Treat Population: all participants who were randomized. Participants with a baseline and Week 4 assessment. Observed cases.

The IBDQ is a self-administered 32-item questionnaire to evaluate quality of life across 4 dimensional scores: bowel, systemic, social and emotional. Responses to each question range from 1 (severe problem) to 7 (normal health). The range for Bowel Symptom domain score is 10 (severe problem) to 70 (normal health). Response in IBDQ Bowel Symptom domain is defined as an increase of IBDQ Bowel Symptom domain score ≥ 8.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

The IBDQ is a self-administered 32-item questionnaire to evaluate quality of life across 4 dimensional scores: bowel, systemic, social and emotional. Responses to each question range from 1 (severe problem) to 7 (normal health). The IBDQ Fatigue item score range is from 1 (severe problem) to 7 (normal health). Response is defined as an increase of IBDQ Fatigue item score ≥ 1.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

The IBDQ is a self-administered 32-item questionnaire to evaluate quality of life across 4 dimensional scores: bowel, systemic, social and emotional. Responses to each question range from 1 (severe problem) to 7 (normal health). The range for Bowel Symptom domain score is 10 (severe problem) to 70 (normal health). Response in IBDQ Bowel Symptom domain is defined as an increase of IBDQ Bowel Symptom domain score ≥ 8.

Time frame: Week 4

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical response was scored using CDAI, which assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450. Clinical response was defined as a decrease in CDAI ≥ 70 points from Baseline. Endoscopic response was scored using the SES-CD, which evaluates 4 endoscopic variables (ulcer size ranging from 0 \[none\] to 3 \[very large\]; ulcerated surface ranging from 0 \[none\] to 3 \[\>30%\]; affected surface ranging from 0 \[none\] to 3 \[\>75%\], and narrowing ranging from 0 \[none\] to 3 \[cannot be passed\]) in 5 segments assessed during ileocolonoscopy. The total score is the sum of the 4 endoscopic variable scores and range from 0 to 56, where higher scores indicate more severe disease. Endoscopic response was defined as SES-CD total score \>50% from Baseline (or for Baseline SES-CD of 4, at least a 2-point reduction from Baseline) at Week 12.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

The SES-CD evaluates 4 endoscopic variables (ulcer size ranging from 0 \[none\] to 3 \[very large\]; ulcerated surface ranging from 0 \[none\] to 3 \[\>30%\]; affected surface ranging from 0 \[none\] to 3 \[\>75%\], and narrowing ranging from 0 \[none\] to 3 \[cannot be passed\]) in 5 segments assessed during ileocolonoscopy (ileum, right colon, transverse colon, sigmoid and left colon, and rectum). The total score is the sum of the 4 endoscopic variable scores and range from 0 to 56, where higher scores indicate more severe disease.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical remission was scored using the CDAI. CDAI assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Participants taking corticosteroids at Baseline.

Clinical remission was scored using the CDAI. CDAI assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical remission was scored using the CDAI. CDAI assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450. Endoscopic remission was scored using the SES-CD.The SES-CD evaluates 4 endoscopic variables (ulcer size ranging from 0 \[none\] to 3 \[very large\]; ulcerated surface ranging from 0 \[none\] to 3 \[\>30%\]; affected surface ranging from 0 \[none\] to 3 \[\>75%\], and narrowing ranging from 0 \[none\] to 3 \[cannot be passed\]) in 5 segments assessed during ileocolonoscopy. The total score is the sum of the 4 endoscopic variable scores and range from 0 to 56, where higher scores indicate more severe disease. Endoscopic remission was defined as SES-CD ≤ 4 and at least a 2-point reduction versus baseline and no subscore greater than 1 in any individual variable.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical remission was scored using the CDAI. CDAI assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450.

Time frame: Week 4

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical response was scored using CDAI. CDAI assesses the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450. Clinical response was defined as a decrease in CDAI ≥ 70 points from Baseline.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Clinical response was scored using CDAI is used to assess the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450. Clinical response was defined as a decrease in CDAI ≥ 70 points from baseline.

Time frame: Week 4

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Endoscopic remission was scored using the SES-CD.The SES-CD evaluates 4 endoscopic variables (ulcer size ranging from 0 \[none\] to 3 \[very large\]; ulcerated surface ranging from 0 \[none\] to 3 \[\>30%\]; affected surface ranging from 0 \[none\] to 3 \[\>75%\], and narrowing ranging from 0 \[none\] to 3 \[cannot be passed\]) in 5 segments assessed during ileocolonoscopy (ileum, right colon, transverse colon, sigmoid and left colon, and rectum). The total score is the sum of the 4 endoscopic variable scores and range from 0 to 56, where higher scores indicate more severe disease. Endoscopic remission was defined as SES-CD ≤ 4 and at least a 2-point reduction versus baseline and no subscore greater than 1 in any individual variable.

Time frame: Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

Time frame: Week 4

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.

CDAI is used to assess the symptoms of participants with Crohn's Disease. Scores generally range from 0 to 600, where clinical remission of Crohn's disease is defined as CDAI \< 150, and very severe disease is defined as CDAI \> 450.

Time frame: Week 4 and Week 12

Population: Intent to Treat Population: all participants who were randomized. Non-responder imputation.