A Study of Real-World Outcomes of People With Crohn's Disease (CD)

Clinical remission will be defined as Crohn's Disease Activity Index (CDAI) score less than (<) 150 points, or if unknown, Harvey-Bradshaw Index (HBI) Overall score less than or equal to (<=) 4 points, or if unknown, Modified HBI (mHBI) score <=4 points, or if unknown, changes in biomarker assessments (C-reactive Protein, Fecal Calprotectin, and albumin) or remission status recorded in medical chart as 'in remission'. CDAI score <150 indicates quiescent disease and >450 indicates extremely severe disease. HBI consisted of 5 clinical parameters: general well-being, abdominal pain, number of liquid stools per day, abdominal mass, and complications. mHBI consisted of 4 clinical parameters- general well-being, abdominal pain, number of liquid stools per day and additional manifestation. HBI and mHBI total score will be sum of individual parameters, score ranges 0 to no pre-specified maximum score as it depends on number of liquid stools, where higher scores is more severe disease.

Clinical response will be defined as CDAI positive change in score from baseline, or if unknown, HBI overall score decrease of >=3 points from baseline, or if unknown, Modified HBI score decrease of >=3 points from baseline, or if unknown, changes in biomarker assessments (CRP, FCP, and albumin) or treatment response recorded in the medical chart as 'complete response' or 'partial response'. CDAI score <150 indicates quiescent disease and >450 indicates extremely severe disease. HBI consisted of 5 clinical parameters: general well-being, abdominal pain, number of liquid stools per day, abdominal mass, and complications. mHBI consisted of 4 clinical parameters- general well-being, abdominal pain, number of liquid stools per day and additional manifestation. HBI and mHBI total score will be sum of individual parameters, score ranges 0 to no pre-specified maximum score as it depends on number of liquid stools, where higher scores is more severe disease.

Clinical remission will be defined as CDAI score <150 points, or if unknown, HBI Overall score of <=4 points, or if unknown, mHBI score of <=4 points, or if unknown, changes in biomarker assessments (CRP, FCP, and albumin) or remission status recorded in the medical chart as 'in remission'. CDAI score <150 indicates quiescent disease and >450 indicates extremely severe disease. HBI consisted of 5 clinical parameters: general well-being, abdominal pain, number of liquid stools per day, abdominal mass, and complications. mHBI consisted of 4 clinical parameters- general well-being, abdominal pain, number of liquid stools per day and additional manifestation. HBI and mHBI total score will be sum of individual parameters, score ranges 0 to no pre-specified maximum score as it depends on number of liquid stools, where higher scores is more severe disease.

Mucosal healing will be defined as endoscopic assessment score = 0 or 1 (that is, normal or inactive disease or mild disease), or if unknown, Simple Endoscopic Score for Crohn's Disease [SES-CD] score of <3, 'lack of ulceration' defined by one or more of the following endoscopic procedure findings either selection of 'no ulcers' or free-text indication of 'lack of ulceration', or if unknown, one or more endoscopic procedure findings indicating inactive disease (no findings/no active disease, no erosion, no ulcers, no inflammation or inflammatory activity, or no pathological findings), with higher scores indicating more severe disease. The score for each endoscopic variable is sum of values obtained for each segment. The SES-CD total is sum of the 4 endoscopic variable scores from 0 to 56, where higher scores indicate more severe disease.

Deep remission (clinical remission and mucosal healing) is defined as CDAI score <150 and SES-CD score <3. CDAI is scoring system for the assessment of CD activity, index values of 150 and below are associated with quiescent disease; values above that indicate active disease and values above 450 are seen with extremely severe disease. The SES-CD evaluates 4 endoscopic variables (ulcer size, percentage of the surface area affected, and stenosis in 5 colonic segments evaluated during ileocolonoscopy (ileum, right colon, transverse colon, left colon, and rectum). The SES-CD total is the sum of the 4 endoscopic variable scores from 0 to 56, where higher scores indicate more severe disease.

CS-free remission is defined as participants using oral corticosteroids at baseline who have discontinued corticosteroids and have clinical remission up to 36-months.

Corticosteroid-free response is defined as participants using oral corticosteroids at baseline who have discontinued oral corticosteroids and have clinical response up to 36-months.

Time to Treatment Switching is defined as time from index treatment initiation until a participant initiates subsequent treatments.

Time to Treatment Discontinuation is defined as time from index treatment initiation until participant discontinues index treatment without switching to subsequent treatments.

Time to Dose Escalation is defined as time from index treatment initiation until increase in index treatment frequency or dose and/or treatment frequency for >=2 consecutive drug administrations.

Incidence rate of AE will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time.

Incidence rate of SAEs will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. SAE is defined as an AE that either results in death, was a life threatening event), requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, results in a congenital anomaly/birth defect, or is a medically important event in the opinion of the physician.

Incidence rate of SIs will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. SI is defined as an SAE that is an infection.

Incidence rate of ED will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time.

Incidence rate of CD-related hospitalizations will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. and CD-related Hospitalizations is defined as hospitalization with reason for hospitalization related to CD.

Incidence rate of CD-related surgical procedures will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. CD-related surgical procedures are defined as types of surgeries that are related to CD.

Incidence rate of disease exacerbations will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. Exacerbations are defined as disease flares documented in the participant's medical chart.

Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Clinical response defined as CDAI positive change in score from baseline, if unknown, HBI overall score decrease >=3 points from baseline, if unknown, mHBI score decrease >=3 points from baseline, if unknown, changes in CRP, FCP, albumin or treatment response as complete response/partial response. CDAI score <150 indicates quiescent disease, >450 indicates extremely severe disease. HBI includes general well-being, abdominal pain, number of liquid stools per day, abdominal mass, complications. mHBI includes general well-being, abdominal pain, number of liquid stools/day, additional manifestation. HBI and mHBI total score is sum of individual parameters, score ranges 0 to no pre-specified maximum score, as it depends on number of liquid stools, higher scores means severe disease. Subsequent line treatment: biologic and advanced therapy regimen for participants who discontinued biologic VDZ and UST, initiated 1 or more biologic, advanced therapies, post-index treatment discontinuation.

Clinical remission defined as CDAI score <150 points, or if unknown, HBI Overall score of <=4 points, or if unknown, mHBI score of <=4 points, or if unknown, changes in CRP, FCP, and albumin or remission status recorded in the medical chart as 'in remission'. CDAI score <150 indicates quiescent disease and >450 indicates extremely severe disease. HBI includes: general well-being, abdominal pain, number of liquid stools/day, abdominal mass, complications. mHBI includes- general well-being, abdominal pain, number of liquid stools/day and additional manifestation. HBI and mHBI total score will be sum of individual parameters, score ranges 0 to no pre-specified maximum score as it depends on number of liquid stools, where higher scores is more severe disease. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic VDZ or UST and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Mucosal healing defined as endoscopic score = 0 or 1 (normal or inactive disease or mild disease), or if unknown, Simple Endoscopic Score for Crohn's Disease [SES-CD] score of <3, 'lack of ulceration' defined by one or more of following endoscopic procedure findings either selection of 'no ulcers' or free-text indication of 'lack of ulceration', or if unknown, one or more endoscopic procedure findings: inactive disease (no findings/no active disease, no erosion, no ulcers, no inflammation or inflammatory activity, or no pathological findings), higher scores more severe disease. Score for each endoscopic variable is sum of values obtained for each segment. SES-CD total is sum endoscopic variable scores: 0 to 56, higher scores indicate more severe disease. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic VDZ or UST and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Deep remission (clinical remission and mucosal healing) is defined as CDAI score <150 and SES-CD score <3. CDAI is scoring system for the assessment of CD activity, index values of 150 and below are associated with quiescent disease; values above that indicate active disease and values above 450 are seen with extremely severe disease. The SES-CD evaluates 4 endoscopic variables (ulcer size, percentage of the surface area affected, and stenosis in 5 colonic segments evaluated during ileocolonoscopy (ileum, right colon, transverse colon, left colon, and rectum). The SES-CD total is the sum of the 4 endoscopic variable scores from 0 to 56, where higher scores indicate more severe disease. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

CS-free remission is defined as participants using oral corticosteroids at baseline. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Corticosteroid-free response is defined as participants using oral corticosteroids at baseline. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Incidence rate of AE will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Incidence rate of SAEs will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. SAE is defined as an AE that either results in death, was a life threatening event), requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, results in a congenital anomaly/birth defect, or is a medically important event in the opinion of the physician. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.

Incidence rate of SIs will be measured in per 100 person-years. 100 person-years will be used as it is a method that can account for large among-participant variations in follow-up time. SI is defined as an SAE that is an infection. Subsequent line treatment is defined as biologic and advanced therapy regimen(s) for participants who discontinued biologic vedolizumab or ustekinumab and initiated one or more biologic and advanced therapies, post-index treatment discontinuation.