A Study to Evaluate Further Therapeutic Strategies With Guselkumab in Participants With Moderate-to-Severe Plaque-Type Psoriasis

Time to improvement from baseline in PASI 75/90/100 response for participants with short disease duration (SDD) and longer disease duration (LDD) was reported. PASI was used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translates to numeric score that ranged from 0 (no involvement) to 6 (90-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced numeric score ranging from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease. PASI responders were participants with >=75%, >=90%, 100% improvement in PASI respectively. For Part 2, data is reported only for those groups in which participants had PASI improvement post Week 28.

Percentage of participants with short (<=2 years) and longer (>2 years) disease duration who achieved an absolute PASI Score of 0, <=1 and less than (<) 3 was reported. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translated to numeric score that ranged from 0 (indicated no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease.

Percentage of participants who retain disease control (that is, absolute PASI score <3 from Week 68 through Week 220 for participants with short (<= 2 years) and longer (>2 years) disease duration was reported. Control of disease was defined as participants with a PASI score <3. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translated to numeric score that ranged from 0 (indicated no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease

Percentage of participants who achieved PASI 75/90/100 response were reported. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translated to numeric score that ranged from 0 (indicated no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease. PASI 75 responders were defined as participants with >= 75% improvement in PASI from baseline. PASI 90 responders were defined as participants with >= 90% improvement in PASI from baseline. PASI 100 responders were defined as participants with 100% improvement in PASI from baseline.

Time to loss of disease control (absolute PASI score >5) after treatment withdrawal beyond Week 68 up to Week 220 were reported. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translated to numeric score that ranged from 0 (indicated no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease.

Percentage of participants with an absolute PASI score = 0 at Weeks 12, 16, 20 and 28 were reported. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translated to numeric score that ranged from 0 (indicated no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease.

Change from baseline (Week 0) in DLQI score were reported. DLQI was a 10-item instrument questionnaire designed to assess the impact of the disease on a participant's quality of life. Each question was evaluated on a 4-point scale ranged from 0 (not at all) to 3 (very much); where higher scores indicated more impact on quality of life. Scores from all 10 questions added up to give DLQI total score ranged from 0 (not at all) to 30 (very much). Higher scores indicated more impact on quality of life of participants.

Percentage of participants who achieved a DLQI score 0/1 and <5 was reported. DLQI was a 10-item instrument questionnaire designed to assess the impact of the disease on a participant's quality of life. Each question was evaluated on a 4-point scale ranged from 0 (not at all) to 3 (very much); where higher scores indicated more impact on quality of life. Scores from all 10 questions added up to give DLQI total score ranged from 0 (not at all) to 30 (very much). Higher scores indicated more impact on quality of life of participants.

Percent change from baseline in the psoriasis affected BSA (%) was reported. The percentage of the psoriasis-affected BSA percentage is a system used for assessing the severity of psoriasis. The plaque coverage is estimated using the rule of palm (1 palm of the hand = 1% BSA)

Change from baseline in NAPPA-CLIN at Weeks 28, 68, 116 164, and 220 was reported. NAPPA-CLIN is an instrument used by the physician to assess the least and the worst involved nail of both hands or both feet with scores ranging from 0 (no involvement) to 16 (worst involvement). A higher score indicated a worst involvement.

Change from baseline (Week 0) in the signs and symptoms aggregate scores of the PSSD at Weeks 28, 68, 116, 164 and 220 was reported. The PSSD was a questionnaire designed to measure the severity of psoriasis symptoms and signs for the assessment of treatment benefit. PSSD was a participant self-administered outcomes instrument that included 11 items covering symptoms (itch, pain, stinging, burning and skin tightness) and participant observable signs (skin dryness, cracking, scaling, shedding or flaking, redness and bleeding) using 0 to 10 numerical rating scales for severity. Two sub scores each ranging from 0 to 100 were derived: the psoriasis symptom score and the psoriasis sign score. A higher score indicated more severe disease. A change of >= 40 points in PSSD symptom score or sign score, and a >= 3-point change in individual PSSD item scale scores was defined as clinically meaningful change (response).

Percentage of participants who achieved a PSSD sign score = 0 at Week 68 in participants with a PSSD sign score >= 1 at Week 28 was reported. The PSSD was a questionnaire designed to measure the severity of psoriasis symptoms and signs for the assessment of treatment benefit. PSSD was a participant self-administered outcomes instrument that included 11 items covering symptoms (itch, pain, stinging, burning and skin tightness) and participant observable signs (skin dryness, cracking, scaling, shedding or flaking, redness and bleeding) using 0 to 10 numerical rating scales for severity. Two sub scores each ranging from 0 to 100 were derived: the psoriasis symptom score and the psoriasis sign score. A higher score indicated more severe disease.

Serum trough guselkumab levels at Weeks 20, 28, 36 were analyzed. Serum samples were analyzed to determine trough concentrations of guselkumab using a validated specific, and sensitive method. Week 28 data are presented in Part 2 arms (Groups 2a and 2b) as these groups were established at Week 28, however pre-Week 28 trough concentrations are also reported under these groups to assess potential differences between Part 1 PK characteristics.

Percentage of participants who were re-treated due to loss of disease control (PASI >5) and regain control of disease (PASI <3) 24 weeks after start of re-treatment was reported. PASI was a system used for assessing and grading severity of psoriatic lesions and their response to therapy. In PASI, body was divided into 4 regions: head, trunk, upper extremities, and lower extremities. Each of these areas was assessed separately for percentage of area involved, which translates to numeric score that ranged from 0 (indicates no involvement) to 6 (90%-100% involvement), and for erythema, induration, and scaling, which were each rated on a scale of 0 to 4. PASI produced a numeric score that could range from 0 (no psoriasis) to 72 (maximum psoriasis). Higher score indicated more severe disease.

An adverse event (AE) is 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 treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal finding), symptom, or disease temporally associated with the use of a medicinal (investigational or non-investigational) product, whether or not related to that medicinal (investigational or non-investigational) product.

Number of participants with clinically significant laboratory abnormalities was reported. Data of participants with at least one lab abnormality is reported. Abnormality criteria: Aspartate Aminotransferase (AST) >3, Alanine Aminotransferase (ALT).>5. For arm 3a and 3b, no drug was administered, hence no laboratory data was collected, per planned analysis.