Real-world Effectiveness of Ustekinumab in Participants Suffering From Inflammatory Bowel Disease (Crohn's Disease or Ulcerative Colitis) With Extra-intestinal Manifestations or Immune-mediated Inflammatory Diseases

CR will be determined based on the measures collected by the investigators which will be assessed by the specialists based on these parameters: 2 points reduction in physician global assessment (PGA) score or PGA 0 or 1 (0= clear to 5=very severe) achieved for cutaneous disease, or resolution of lesions for Erythema nodosum (dermatology); decrease of 50 percent (%) of ankylosing spondylitis disease activity index (BASDAI) (1=no problem to 10=worst problem) for axial spondyloarthritis (SpA); disease activity score (DAS)28 (derived from 4 items with score <2.6 [disease remission] and >5.1 [severe disease activity]) of moderate and good response achieved in peripheral SpA plus 2 points reduction in PGA score or PGA 0 or 1 achieved in case of associated psoriasis; resolution of dactylitis, decrease of 50% of Leeds enthesitis index [LEI-6] score which ranges from 0 [pain/tenderness absent] to1 [pain/tenderness present] for enthesitis, (rheumatology); resolution of uveitis (ophthalmology).

HBI is defined as total HBI score of 4 points or less. HBI score consists of clinical parameters of general well-being (0 to 4), abdominal pain (0 to 3), number of liquid stools per day, abdominal mass (0 to 3), and complications (8 items, score 1 per item) lower scores indicating better well-being.

Percentage of participants achieving remission for CD will be measured using the HBI Score less than or equal to (<= 4). HBI remission is defined as total HBI score of 4 points or less. HBI score consists of clinical parameters of general well-being (0 to 4), abdominal pain (0 to 3), number of liquid stools per day, abdominal mass (0 to 3), and complications (8 items, score 1 per item) lower scores indicating better well-being.

Mayo scoring system is used for assessment of ulcerative colitis activity. The Mayo score consists of 4 subscores (stool frequency, rectal bleeding, physician's global assessment, and endoscopy findings) each ranging from 0 to 3. Partial Mayo score is calculated as the sum of 3 subscores (stool frequency, rectal bleeding, and physician's global assessment) and ranges from 0 to 9 points. Higher score indicates severe disease. Change from baseline in the Partial Mayo Score of at least 3 points and at least 30 percent, with an accompanying decrease in the subscore for rectal bleeding of at least 1 point or an absolute subscore for rectal bleeding of 0 or 1 will be reported.

Percentage of participants achieving remission for UC will be measured using the Partial Mayo score Score less than or equal to <=2). Partial Mayo score is calculated as the sum of 3 subscores (stool frequency, rectal bleeding, and physician's global assessment) and ranges from 0 to 9 points. Higher score indicates severe disease.

Change from baseline in the presence of Extra Intestinal Manifestations (EIMs)/ Immune-Mediated Inflammatory Diseases (IMIDs) for its severity/activity will be determined.

The WPAI is a validated, self-administered questionnaire that assesses work and activity impairment during the past 7 days due to IBD. The WPAI score ranges from 0 to10. Score 0 means IBD had no effect on work and score 10 indicates because of IBD, could not work at all.

Short IBDQ is a health-related quality of life tool (HRQoL) to assess quality of life in adult participants with inflammatory bowel disease (IBD) having only 10 items with 4 domains: digestive symptoms (3 items), systemic symptoms (2 items), emotional disturbance (3 items), and social function (2 items). Participants are asked to recall symptoms and quality of life from the last 2 weeks and rate each item on a 7-point Likert scale (1=all of the time; 2=most of the time; 3=a good bit of the time; 4=some of the time; 5=a little bit of the time; 6=hardly any of the time; 7=none of the time). Total score is calculated by adding the scores from each domain; the total score ranges from 10 to 70, where minimum score =10 (poor HRQoL) and maximum score =70 (good HRQoL).

FACIT-F scale is a 13 item fatigue scale with a 7 day recall period. It measures the level of fatigue during the usual daily activities. The level of fatigue is measured on a 4 point Likert scale (0=very much fatigued to 4=not at all fatigued). Total FACIT score is the sum of 13 items, ranging from 0 (not at all) to 52 (very much). Higher scores represent better outcomes.

The IBD-DI consists of 28 items that evaluate the 5 domains of overall health, body function, body structures, activity participation and environmental factors. Each item response is graded from 0 to 4 for each area evaluated (0 = very good; 1 = Good; 2 = medium; 3 = Bad; 4 = Very bad). The final composite score representative of the overall degree of disability ranging from -80 (maximum degree of disability) to 22 (no disability).

An adverse event is any untoward medical event that occurs in a participant administered an investigational product, and it does not necessarily indicate only events with clear causal relationship with the relevant investigational product.

Number of IBD related medical visits as a part of medical resources utilization will be reported.

Number of days of IBD related hospitalization with surgery (defined as number of days from the day of admission to discharge) as a part of medical resources utilization will be reported.

Number of days of IBD related hospitalization without surgery (defined as number of days from the day of admission to discharge) as a part of medical resources utilization will be reported.

Number of IBD related emergency visits as a part of medical resources utilization will be reported.