A Study to Evaluate Efficacy and Safety of Ustekinumab Re-induction Therapy in Participants With Moderately to Severely Active Crohn's Disease

Clinical response was defined as greater than or equal to (>=) 100-point reduction from baseline in Crohn's disease activity index (CDAI) score or a CDAI score < 150 points. CDAI is validated multi-item measure of severity of illness derived as weighted sum of 8 different Crohn's disease (CD)-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates, and general well-being). The last 4 variables were scored over 7 days by participant on diary card. In general, CDAI score ranges from 0 to approximately 600; higher score=higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical response, regardless of their CDAI score.

Percentage of participants with clinical remission at Week 16 were reported. Clinical remission was defined as CDAI score of <150 points. CDAI is a validated multi-item measure of severity of illness derived as weighted sum of 8 different CD-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates and general well-being). The last 4 variables were scored over 7 days by participant on diary card. In general, CDAI score ranges from 0 to approximately 600; higher score=higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical remission, regardless of their CDAI score.

Clinical response was defined as a >=100-point reduction from the baseline in CDAI score or a CDAI score <150 point. The CDAI is a validated multi-item measure of severity of illness derived as a weighted sum of 8 different CD-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates, and general well-being). The last 4 variables were scored over 7 days by the participant on a diary card. In general, CDAI score ranges from 0 to approximately 600; higher score indicates higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical response, regardless of their CDAI score.

Percentage of participants with clinical remission at Week 8 were reported. Clinical remission was defined as CDAI score of <150 points. CDAI is a validated multi-item measure of severity of illness derived as weighted sum of 8 different CD-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates and general well-being). The last 4 variables were scored over 7 days by participant on diary card. In general, CDAI score ranges from 0 to approximately 600; higher score=higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical remission, regardless of their CDAI score.

Percentage of participants with normalization at Week 16, among participants with elevated CRP and/or fCal at baseline were reported. Participants were considered to be normalized if at least one biomarker (fCal or CRP) was normalized. Normalized CRP=CRP value less than or equal to (<=) 3 milligrams per liter(mg/L). Normalized fCal concentrations was defined as <=250 micrograms per gram(mcg/g). When either CRP or FCal value was abnormal at baseline and value of same parameter normalizes at designated analysis timepoint, participants were considered to be normalized at designated analysis timepoint. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes, or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint are considered not to be normalized. Participants who had insufficient data at designated analysis timepoint had their last value carried forward.

Percentage of participants with clinical remission at Week 24 were reported. Clinical remission was defined as CDAI score of <150 points. CDAI is a validated multi-item measure of severity of illness derived as weighted sum of 8 different CD-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates and general well-being). The last 4 variables were scored over 7 days by participant on diary card. In general, CDAI score ranges from 0 to approximately 600; higher score=higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical remission, regardless of their CDAI score.

Clinical response was defined as a >=100-point reduction from the baseline in CDAI score or a CDAI score <150 point. The CDAI is a validated multi-item measure of severity of illness derived as a weighted sum of 8 different Crohn's disease-related variables (extra-intestinal manifestations, abdominal mass, weight, hematocrit, total number of liquid stools, abdominal pain/cramping, use of antidiarrheal drug(s) and/or opiates, and general well-being). The last 4 variables were scored over 7 days by the participant on a diary card. In general, CDAI score ranges from 0 to approximately 600; higher score indicates higher disease activities. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint were considered not to be in clinical response, regardless of their CDAI score.

Percentage of participants with normalization at Week 24, among participants with elevated CRP and/or fCal at baseline were reported. Participants were considered to be normalized if at least one biomarker (fCal or CRP) was normalized. Normalized CRP=CRP value less than or equal to (<=) 3 milligrams per liter(mg/L). Normalized fCal concentrations was defined as <=250 micrograms per gram(mcg/g). When either CRP or FCal value was abnormal at baseline and value of same parameter normalizes at designated analysis timepoint, participants were considered to be normalized at designated analysis timepoint. Participants who had prohibited CD-related surgery, prohibited concomitant medication changes, or discontinued study agent due to lack of efficacy or adverse event indicated to be of worsening CD prior to designated analysis timepoint are considered not to be normalized. Participants who had insufficient data at designated analysis timepoint had their last value carried forward.

An adverse event was any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An adverse event does not necessarily have a causal relationship with the treatment. TEAEs were adverse events with onset during the intervention phase or that were a consequence of a pre-existing condition that had worsened since baseline. Any AE occurring at or after the initial administration of study agent through the end of the trial was considered to be treatment emergent. In this outcome measure, TEAEs including all AEs irrespective of being serious or non-serious AE are reported.

A serious adverse event (SAE) was an adverse event resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly; a suspected transmission of any infectious agent via a medicinal product; medically important. TESAEs were adverse events with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline. Any AE occurring at or after the initial administration of study agent through the end of the trial was considered to be treatment emergent.

Percentage of participants with treatment-emergent infections were reported. Any infection occurring at or after the initial administration of study agent through the end of the trial was considered to be treatment emergent.

Percentage of participants with treatment-emergent serious infections was reported. Any infection occurring at or after the initial administration of study agent through the end of the trial was considered to be treatment emergent.

Change from baseline in clinical laboratory values for hematology (hemoglobin) and chemistry (albumin, total protein) was reported.

Change from baseline in clinical laboratory values for hematology (hematocrit) was reported.

Change from baseline in clinical laboratory values for hematology (total WBC, neutrophils, absolute lymphocyte, eosinophils, platelets) was reported.

Change from baseline in clinical laboratory values for chemistry (alkaline, ALT, AST) was reported.

Change from baseline in clinical laboratory values for chemistry (total bilirubin, direct bilirubin, creatinine) was reported.

Change from baseline in clinical laboratory values for chemistry (sodium, potassium, chloride, BUN/urea, calcium, phosphate) was reported.