Treatment-emergent adverse events will be reported to analyze the long-term safety of guselkumab in pediatric participants.

Percentage of participants with clinical remission as assessed by modified Mayo score at Week 56 among participants who were induction responders will be reported. Clinical remission per modified Mayo score is defined as a stool frequency subscore of 0 or 1, a rectal bleeding subscore of 0, and an endoscopy subscore of 0 or 1 with no friability present on the endoscopy, where the stool frequency subscore has not increased from induction baseline.

The IGA assesses participant's plaque psoriasis. Lesions were graded for induration, erythema and scaling, each using a 5 point scale. Induration: 0 = no evidence of plaque elevation, 1 = minimal plaque elevation, = 0.25 millimeters (mm); 2 = mild plaque elevation, = 0.5 mm; 3 = moderate plaque elevation, = 0.75 mm; 4 = severe plaque elevation, greater than (\>) 1 mm; Erythema: 0 = no evidence of erythema, hyperpigmentation may be present, 1 = faint erythema, 2 = light red coloration, 3 = moderate red coloration, 4 = bright red coloration; Scaling: 0 = no evidence of scaling, 1 = minimal; occasional fine scale over less than 5% of the lesion, 2 = mild; fine scale dominates, 3 = moderate; coarse scale predominates, 4 = severe; thick, scale predominates. Final IGA score of psoriasis was based upon the average of induration, erythema and scaling scores assessed on a 5 point scale: cleared (0), minimal (1), mild (2), moderate (3), or severe (4). Higher score indicated more severe disease.

Percentage of participants who achieve combined fistula remission at Week 24 will be reported. Combined fistula remission is defined as 100 percentage (%) closure of all treated external openings without development of new fistulas or abscesses and without any drainage by the external openings \[occurring spontaneously or after gentle finger compression\] and absence of collections greater than (\>) 2 centimeters (cm) of the perianal fistulas in at least two of three dimensions, confirmed by a blinded central review of the magnetic resonance imaging \[MRI\] results.

Percentage of participants in clinical remission at Week 12 was reported. Clinical remission is defined as a Mayo stool frequency subscore of 0 or 1 and not increased from baseline, a Mayo rectal bleeding subscore of 0, and a Mayo endoscopy subscore of 0, or 1 with no friability present on the endoscopy. Mayo stool frequency subscore was determined on the average number of stools more than normal in 24 hours, score ranged from 0 (normal number of stools) to 3 (5 or more stools more than normal), higher score indicated more severity. Mayo rectal bleeding subscore ranged from 0 (no blood seen) to 3 (blood alone passed), higher score indicated more severity. Mayo endoscopy subscore ranged from 0 (normal or inactive disease) to 3 (severe disease), higher score indicated more severity.

The IGA assesses participant's plaque psoriasis. Lesions were graded for induration, erythema and scaling, each using a 5 point scale. Induration: 0 = no evidence of plaque elevation; 1 = minimal plaque elevation, = 0.25 millimeters (mm); 2 = mild plaque elevation, = 0.5 mm; 3 = moderate plaque elevation, = 0.75 mm; 4 = severe plaque elevation, greater than (\>) 1 mm; Erythema: 0 = no evidence of erythema, hyperpigmentation may be present, 1 = faint erythema, 2 = light red coloration, 3 = moderate red coloration, 4 = bright red coloration; Scaling: 0 = no evidence of scaling, 1 = minimal; occasional fine scale over less than 5% of the lesion, 2 = mild; fine scale dominates, 3 = moderate; coarse scale predominates, 4 = severe; thick, scale predominates. Final IGA score of psoriasis was based upon the average of induration, erythema and scaling scores assessed on a 5 point scale: cleared (0), minimal (1), mild (2), moderate (3), or severe (4). Higher score indicated more severe disease.

Percentage of participants who achieved PASI 90 response (greater than or equal to \[\>=\] 90 percent \[%\] improvement from baseline in PASI) at Week 16 was reported. PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed and scored separately for erythema, induration, and scaling, which were each rated on a scale of 0 to 4 (0=none, 1=slight, 2=moderate, 3=severe and 4=very severe) and extent of involvement from 0 (indicated no involvement) to 6 (90% - 100% involvement). The PASI produced a numeric total score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date unless otherwise specified.

The ss-IGA instrument was used to evaluate the disease severity of scalp psoriasis. The lesions were assessed in terms of the clinical signs of redness, thickness, and scaliness which was scored as: absence of disease = 0, very mild disease = 1, mild disease = 2, moderate disease = 3, and severe disease = 4. A higher score indicated more severe disease.

PSSI 90 response is defined as a percentage of participants who achieved at least 90% improvement from baseline in the PSSI score. PSSI is a physician assessment of severity of erythema, infiltration, and desquamation and extent of psoriasis involvement. Severity of erythema, infiltration, and desquamation each scored on a scale of 0 (none) to 4 (very severe) and the extent of psoriasis involvement scored on a scale from 1 (\<10% of scalp involved) to 6 (90 to 100% of scalp involved). The composite score is derived from the sum of scores for erythema, induration, and desquamation multiplied by the score recorded for the extent of the psoriasis involvement. The PSSI score ranged from 0 (less severity) to 72 (more severity). Higher scores indicated more severe symptoms. The baseline was defined as the closest measurement taken prior to or at the time of the first study drug administration date unless otherwise specified.

ACR 20 response: \>=20% improvement from baseline in both swollen joint count (66 joints) and tender joint count (68 joints), and \>=20% improvement from baseline in 3 of 5 assessments: patient's assessment of pain using visual analog scale (VAS; 0-100 mm, 0=no pain and 100=worst possible pain), patient's global assessment of disease activity (arthritis, VAS; 0-100 mm, 0=excellent and 100= poor), physician's global assessment of disease activity (VAS; 0-100 mm, 0=no arthritis activity and 100=extremely active arthritis), patient's assessment of physical function measured by Disability Index of Health Assessment Questionnaire (HAQ-DI; 20-question instrument assessing 8 functional areas; range: 0-3, 0= no difficulty, 3= inability to perform task in that area), and CRP.

Number of participants with TEAEs were reported. An adverse event (AE) was any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with the intervention. Treatment-emergent AEs (TEAEs) were AEs with onset during the intervention phase or that were a consequence of a pre-existing condition that had worsened since baseline. All TEAEs including serious and non-serious AEs were reported.

Number of participants with TESAEs were reported. TEAEs are AEs with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline. A serious adverse event (SAE) was an AE 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.

Number of participants with TEAESI was reported. Active tuberculosis (TB) or malignancies were considered as TEAESIs. TEAESIs were AESIs with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline.

Number of participants with treatment-emergent abnormalities in hematology laboratory parameters were reported. Laboratory tests included in hematology were hemoglobin, lymphocytes, neutrophils, platelet count, Total WBC (white blood cell) Count. National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE) toxicity grades were Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe), Grade 4 (Potentially Life-Threatening). TE abnormalities are laboratory abnormalities with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline.

Number of participants with treatment-emergent abnormalities in chemistry laboratory parameters were reported. Laboratory parameters included in clinical chemistry were albumin, corrected calcium, creatinine, glucose, potassium, sodium. NCI-CTCAE) toxicity grades were Grade 1 (Mild), Grade 2 (Moderate), Grade 3 (Severe), Grade 4 (Potentially Life-Threatening). TE abnormalities are laboratory abnormalities with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline.

Number of participants with TEAEs of infections were reported. TEAEs are AEs with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline.

Number of participants with TEAEs of injection-site reactions were reported. A significant injection-site reaction was defined as an adverse reaction that was manifested through 1 or more of the following symptoms: significant bruising, erythema, hemorrhage, irritation, pain, pruritus at the site of injection. TEAEs are AEs with onset during the intervention phase or that are a consequence of a pre-existing condition that has worsened since baseline.

Number of participants with TEAEs temporally associated with infusion were reported. TEAEs are AEs with onset during the intervention phase or that are a consequence of a preexisting condition that had worsened since baseline.

TEAEs are AEs with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline. The Columbia-suicide severity rating scale (C-SSRS) defined was 5 subtypes of suicidal ideation and 4 possible suicidal behaviors, as well as non-suicidal self-injurious behavior and completed suicide. The C-SSRS was an investigator-administered questionnaire: 1) No suicidal ideation or behaviors (including self-injurious behavior without suicidal intent): No further action was needed; 2) Suicidal ideation levels 1-3 or non-suicidal self-injurious behavior; participant risk is assessed by the investigator. 3) Suicidal ideation levels 4 or 5 or any suicidal behavior: participant risk assessed and referral to a mental health professional. If no events qualify for scores of 1 to 10, score of 0 was assigned (0= "no event that can be assessed on the basis of C-SSRS"). Higher scores indicated greater severity.

Number of participants with clinically significant treatment-emergent abnormalities in vital signs were reported. Vital signs included weight, pulse rate, temperature, respiratory rate, systolic blood pressure, and diastolic blood pressure. TEAEs are AEs with onset during the intervention phase or that are a consequence of a pre-existing condition that had worsened since baseline.

Number of participants with concomitant medications for Crohn's disease were reported.

Percentage of participants who achieve ppPASI75 response, defined as improvement greater than or equal to (\>=) 75 percent (%) in the ppPASI score at Week 16 will be reported. The ppPASI is an assessment tool based on the PASI that assesses erythema, pustules, desquamation and the extent of disease of the palms and/or soles.

The ACR 20 Response is defined as greater than or equal to (\>=) 20 percent (%) improvement in swollen joint count (66 joints) and tender joint count (68 joints) and \>=20 percent improvement in 3 of following 5 assessments: participant's assessment of pain using Visual Analog Scale (VAS; 0-10 millimeter \[mm\], 0 mm=no pain and 10 mm=worst possible pain), participant's global assessment of disease activity by using VAS (scale ranges from 0 mm to 100 mm, \[0 mm=no pain to 100 mm=worst possible pain\]), physician's global assessment of disease activity using VAS, participant's assessment of physical function measured by Health Assessment Questionnaire-Disability Index (HAQ-DI, defined as a 20-question instrument assessing 8 functional areas. The derived HAQ-DI ranges from 0, indicating no difficulty, to 3, indicating inability to perform a task in that area) and C-reactive protein (CRP).

Percentage of participants who achieved an absolute PASI \<3 at Week 68 were reported. The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the body surface area involved, which translates to a numeric score that ranged from 0 (indicated no involvement) to 6 (90 percent \[%\]-100% involvement), and for erythema, induration and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated greater severity of psoriasis.

The IGA assesses participant's plaque psoriasis. Lesions were graded for induration, erythema and scaling, each using a 5 point scale. Induration: 0 = no evidence of plaque elevation, 1 = minimal plaque elevation, = 0.25 mm; 2 = mild plaque elevation, = 0.5 mm; 3 = moderate plaque elevation, = 0.75 mm; 4 = severe plaque elevation, \>1 mm; Erythema: 0 = no evidence of erythema, hyperpigmentation may be present, 1 = faint erythema, 2 = light red coloration, 3 = moderate red coloration, 4 = bright red coloration; Scaling: 0 = no evidence of scaling, 1 = minimal; occasional fine scale over less than 5% of the lesion, 2 = mild; fine scale dominates, 3 = moderate; coarse scale predominates, 4 = severe; thick, scale predominates. Final IGA score of psoriasis was based upon the average of induration, erythema and scaling scores assessed on a 5 point scale: cleared (0), minimal (1), mild (2), moderate (3), or severe (4). A higher score indicated more severe disease.

The PASI was a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body was divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percent \[%\] to 100% involvement), and for erythema, induration, and scaling, which are each rated on a scale of 0 (none) to 4 (severe). The PASI produced a numeric score that can range from 0 (no visible skin involvement) to 72 (maximal skin involvement of the whole body). A higher score indicated more severe disease. A PASI 75 response represented participants who achieved at least a 75 % improvement from baseline in the PASI score.

The PASI is a system used for assessing and grading the severity of psoriatic lesions. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 to 6, and for erythema, induration, and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that can range from 0 to 72. A higher score indicates more severe disease. A PASI 90 response represents participants who achieved at least a 90 percent improvement from baseline in the PASI score.

The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percent (%) to 100% involvement), and for erythema, induration, and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that can range from 0 (no psoriasis) to 72. A higher score indicates more severe disease. A PASI 90 response represents participants who achieved at least a 90 percent improvement from baseline in the PASI score. Non-responder imputation (counted as non-responders) was applied for participants who met treatment failure rules, as well as for remaining missing data after treatment failure.

The PASI is a system used for assessing and grading the severity of psoriatic lesions and their response to therapy. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas is assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 (indicates no involvement) to 6 (90 percent \[%\] to 100% involvement), and for erythema, induration, and scaling, which are each rated on a scale of 0 (none) to 4 (severe). The PASI produces a numeric score that can range from 0 (no visible skin involvement) to 72 (maximal skin involvement of the whole body). A higher score indicates more severe disease. A PASI 90 response represents participants who achieved at least a 90 % improvement from baseline in the PASI score.

PPPASI assesses severity of palmoplantar pustulosis (PPP) lesions and response to therapy. In PPPASI, palms, soles are divided into 4 regions: right palm(RP), left palm(LP), right sole(RS), left sole(LS), that account for 20 percent (%), 20%,30%,30%, respectively, of total surface area(TSA) of palms, soles. Each area is assessed separately for erythema(E), pustules/vesicles (P), desquamation/scales (D), each rated on a scale (0-4). PPPASI produces score range of 0-72 using formula, PPPASI=(E+P+D)Area\*0.2(RP)+(E+P+D)Area\*0.2 (LP)+(E+P+D)Area\*0.3(RS)+(E+P+D)Area\*0.3(LS). Higher a score more the severe disease. Participants who discontinue study agent as they met treatment failure(TF) criterion(lack of efficacy/AE of worsening of PPP/who started a protocol-prohibited medication/therapy that could improve PPP), their baseline value carried forward to post baseline attending visits before and at Week 16 and after TF were applied, remaining missing data were handled with LOCF till Week 60.

Treatment success is defined as "Very much improved", "Much improved" or "Minimally improved" in Clinical Global Impression (CGI) scale. The CGI scale is a brief clinician-rated instrument which has five categories (Very much improved (1), Much improved (2), Minimally improved (3), No change (4), Worsened (5).

The IGA documents the investigator's assessment of the participants' psoriasis at a given time point. Overall lesions are graded for induration, erythema, and scaling. The participants' psoriasis was assessed as cleared (0), minimal (1), mild (2), moderate (3), or severe (4).

The PASI is a system used for assessing and grading the severity of psoriatic lesions. In the PASI system, the body is divided into 4 regions: the head, trunk, upper extremities, and lower extremities. Each of these areas were assessed separately for the percentage of the area involved, which translates to a numeric score that ranges from 0 to 6, and for erythema, induration, and scaling, which are each rated on a scale of 0 to 4. The PASI produces a numeric score that can range from 0 to 72. A higher score indicates more severe disease. A PASI 90 response represents participants who achieved at least a 90 percent improvement from baseline in the PASI score.

The PGA is a widely recognized and frequently utilized scale for evaluating treatment outcomes in clinical trials, spanning across both adult and pediatric populations. It is a straightforward tool with easily interpretable results. . In order to conduct this assessment, a healthcare provider or physician relies on a comprehensive analysis of data gathered from all aspects of the patient's medical history and condition. Scoring is based on a 9 point Likert scale ranging from Markedly Improved (+4) to Markedly Worse (-4).

ISS is a reliable system to measure global ichthyosis severity in adults and children. The body is divided into 10 regions, and Likert scales (0-4) are used to quantify scale and erythema, with extensive descriptors and photographic standards. The ISS score takes values from 0 to 75. Higher scores indicate more severe injury.

Percentage of participants with clinical remission at Week 48 will be reported. Clinical remission based on the modified Mayo subscores.

MDA defines a satisfactory state of disease activity that includes the 5 domains of psoriatic arthritis (PsA; joint symptoms, skin psoriasis, participant's assessment of pain and disease activity, physical function, and enthesitis). Participants are classified as achieving MDA if they fulfilled 5 of 7 outcome measures: tender joint count less than or equal to (\<=) 1; swollen joint count \<=1; psoriasis area and severity index (PASI) \<=1 or body surface area (BSA) \<=3 percent (%); participant's pain visual analog scale (VAS) score of \<=15; participant's global disease activity VAS (arthritis and psoriasis) score of \<=20; disability index of the health assessment questionnaire (HAQ-DI) score \<=0.5; and tender entheseal points \<=1.

Clinical response was defined as a decrease from induction baseline in the modified Mayo score by greater than or equal to (\>=) 30 percent (%) and \>=2 points, with either a \>=1 point decrease from baseline (Week 0 of IS-1) in the rectal bleeding subscore or a rectal bleeding subscore of 0 or 1. The modified Mayo scores consisted of 3 subscores: stool frequency, rectal bleeding and endoscopic subscore as determined during central review, each subscore graded from 0 (normal) to 3 (severe) with higher scores indicating more severe disease. These individual subscores were summed up to give a total modified Mayo score range of 0 (normal) to 9 (severe disease), where higher scores indicated more severe disease activity. This outcome measure was planned to be analyzed for specified arms only.

Clinical remission was based on the modified Mayo score. Clinical remission was defined as Mayo stool frequency subscore of 0 or 1 and not increased from baseline (Week 0 of IS-2), a Mayo rectal bleeding subscore of 0, and Mayo endoscopic subscore of 0 or 1 with no friability. The modified Mayo scores consisted of 3 subscores: stool frequency, rectal bleeding and endoscopic subscore as determined during central review, each subscore graded from 0 (normal) to 3 (severe) with higher scores indicating more severe disease. These individual subscores were summed up to give a total modified Mayo score range of 0 (normal) to 9 (severe disease), where higher scores indicated more severe disease activity. This outcome measure was planned to be analyzed for specified arms only.

Clinical remission was based on the modified Mayo score. Clinical remission was defined as Mayo stool frequency subscore of 0 or 1 and not increased from baseline (Week 0 of IS-1 and IS-2), a Mayo rectal bleeding subscore of 0, and Mayo endoscopic subscore of 0 or 1 with no friability. The modified Mayo scores consisted of 3 subscores: stool frequency, rectal bleeding and endoscopic subscore as determined during central review, each subscore graded from 0 (normal) to 3 (severe) with higher scores indicating more severe disease. These individual subscores were summed up to give a total modified Mayo score range of 0 (normal) to 9 (severe disease), where higher scores indicated more severe disease activity. This outcome measure was planned to be analyzed for randomized arms only.

Clinical response was defined as a decrease from baseline in the Mayo score greater than or equal to (\>=) 30 percent (%) and \>=3 points with either a decrease from baseline in the rectal bleeding subscore (RBS) \>=1 or a RBS of 0 or 1. The Mayo score was calculated as the sum of 4 subscores (stool frequency, rectal bleeding, physician's global assessment, and endoscopy findings - each with score range of 0 (normal activity) to 3 (severe activity) and a total score range of 0 to 12 points. A score of 3 to 5 points indicates mildly active disease, a score of 6 to 10 points indicates moderately active disease, and a score of 11 to 12 points indicates severely active disease. Higher scores indicate more severity. This outcome measure was analyzed for combination phase only as preplanned in the protocol.

ACR 20 response: at least 20% improvement from baseline in both swollen joint (66 joints) and tender joint (68 joints) counts and at least 20% improvement from baseline in 3 of following 5 assessments: patient's assessment of pain (VAS: 0-100 millimeter \[mm\], 0=no pain and 100=worst possible pain), patient's global assessment of disease activity on arthritis (VAS:0-100mm, 0=excellent and 100=poor), physician's global assessment of disease activity (VAS:0-100mm; 0=no arthritis activity and 100 = extremely active arthritis), patient's assessment of physical function measured by HAQ-DI (defined as a 20-question instrument assessing 8 functional areas;derived HAQ-DI ranges from 0=no difficulty, to 3=inability to perform a task in that area) and serum CRP. Treatment Failure (TF) criteria: Discontinued study drug due to lack of efficacy or worsening of PsA, initiated or increased dose of methotrexate or oral corticosteroids, or initiated prohibited PsA treatments. FAS is full analysis set.

Cmax is defined as maximum observed serum concentration.

AUC(0-infinity) is defined as area under the serum concentration vs time curve from time 0 to infinity based on extrapolation of the terminal phase.

AUC (0-infinity) is the area under the serum concentration versus time curve from time zero to infinity with extrapolation of the terminal phase.

AUC (0-last) area under the serum concentration versus time curve from time zero to the time corresponding to the last quantifiable concentration.

Elimination half-life is time measured for the serum concentration to decrease by 1 half to its original concentration. It is associated with the terminal slope of the semi logarithmic drug concentration-time curve, and is calculated as 0.693/lambda(z).

CL is a quantitative measure of the rate at which a drug substance is removed from the body. The total systemic clearance after intravenous dose is estimated by dividing the total administered dose by the serum area under the serum concentration-time curve from time zero to infinite time (AUC \[0-infinity\]).

The Vz is total volume of distribution at terminal phase after intravenous (IV) administration, defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired blood concentration of a drug.

Tmax is time correspondent to the maximum observed serum concentration.

Apparent total systemic clearance is clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired serum concentration of a drug. Apparent volume of distribution after subcutaneous dose (Vz/F) is influenced by the fraction absorbed.

Absolute bioavailability is the percentage of the orally administered dose that is systemically available. It is calculated as (AUC \[0-infinity\] for test)/(AUC \[0-infinity\] for reference \[ref\])\*(D for ref/D for test)\*100, where the reference treatment is an intravenous administration, AUC (0-infinity) is area under the concentration-time curve from time zero to extrapolated infinite time, and D is the dose of administered drug.

AUC (0-infinity) is the area under the serum concentration-time curve from time zero to infinity time, calculated as the sum of AUC (0-last) and C(last)/lambda(z); wherein AUC (0-last) is area under the serum concentration-time curve from time zero to last measurable concentration, C(last) is the last observed measurable concentration, and lambda(z) is apparent terminal elimination rate constant.

Percentage change from baseline in rectal/pouch polyp burden (sum of the polyp diameters) at Week 24 will be determined through endoscopy.

An AE 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.

The composition of the glycoforms will be quantified and evaluated over time.

The Cmax is the maximum observed plasma concentration of Midazolam, Omeprazole, Dextromethorphan, Caffeine and S-warfarin.

The Tmax is time to reach the maximum observed plasma concentration of Midazolam, Omeprazole, Dextromethorphan, Caffeine and S-warfarin.

The AUC (0-last) is area under the plasma concentration-time curve from time zero to time of last quantifiable concentration of Midazolam, Omeprazole, Dextromethorphan, Caffeine and S-warfarin.

The AUC (0-infinity) is the area under the plasma concentration-time curve from time zero to extrapolated infinite time.

The observed serum concentration of Guselkumab.

The frequency of anti-CNTO1959 antibodies.