A Study to Compare the Efficacy of Guselkumab to Fumaric Acid Esters for the Treatment of Participants With Moderate to Severe Plaque Psoriasis

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.

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 75 response represents participants who achieved at least a 75 % improvement from baseline in the PASI score.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

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 100 response represents participants who achieved a 100% improvement from baseline in the PASI score.

The PSSD (7-day version) is a patient-reported outcome (PRO) questionnaire designed and validated to measure the severity of psoriasis symptoms and signs for the assessment of treatment benefit. It consisted of 11 items covering symptoms (itch, pain, stinging, burning, and skin tightness) and patient-observable signs (skin dryness, cracking, scaling, shedding or flaking, redness, and bleeding) using 0 (absent) to 10 (worst imaginable) numerical rating scales for severity. Items were averaged on the daily symptom score and sign score when at least 3 items greater than or equal to (>=) 50 percentage of 5 items on these scales are answered. The average value is converted into 0-100 scoring, such that Symptom [or Sign] score=average value*10, where, 0= least severe and 100=most severe and higher score indicates more severe disease.

The PSSD (7 day version) is a patient-reported outcome (PRO) questionnaire designed and validated to measure the severity of psoriasis symptoms and signs for the assessment of treatment benefit. It consisted of 11 items covering symptoms (itch, pain, stinging, burning, and skin tightness) and patient-observable signs (skin dryness, cracking, scaling, shedding or flaking, redness, and bleeding) using 0 (absent) to 10 (worst imaginable) numerical rating scales for severity. Items were averaged on the daily symptom score and sign score when at least 3 items (>=50 percentage of 5 items) on these scales are answered. The average value is converted into 0-100 scoring, such that Symptom [or Sign] score = average value*10, where, 0= least severe and 100= most severe and higher score indicates more severe disease.

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. Percentage of Participants who Achieved an absolute PASI score less than or equal to (=<) 1 were assessed.

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

BSA as physical measure to define disease severity is to determine how much of the Body Surface Area (BSA) is affected by psoriasis. Involved BSA is calculated by using the palm of the participant's hand as equivalent to 1% of the BSA (rule of palm). Psoriasis affected BSA under 5% suggests mild psoriasis, a BSA of 5% to 10% is considered moderate, and an involved BSA of over 10% indicates severe psoriasis.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

The ss-IGA instrument is used to evaluate the disease severity of scalp psoriasis (SP). The lesions are assessed in terms of the clinical signs of redness, thickness, and scaliness which are scored as: absence of disease (0), very mild disease (1), mild disease (2), moderate disease (3), and severe disease (4).

SF-36 V2 is a generic 36-item questionnaire measuring health-related quality of life (HRQL) covering 2 summary measures: physical component summary (PCS) and mental component summary (MCS). The SF-36 consists of 8 subscales (physical function, role limitations due to physical problems, pain, general health perception, vitality, social function, role limitations due to emotional problems, and mental health). Participants self-report on items in a subscale that have between 2-6 choices per item using Likert-type responses (e.g. none of the time, some of the time, etc.). Summations of item scores of the same subscale give the subscale scores, which are transformed into a range from 0 to 100; zero= worst HRQL, 100=best HRQL. Higher scores indicate better health status.

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 75 response represents 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 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.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

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 75 response represents 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 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.

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 100 response represents participants who achieved a 100% improvement from baseline in the PASI score.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

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 75 response represents participants who achieved at least a 75 % improvement from baseline in the PASI score. Data reported collectively for Part I and Part IIa (that is from Week 0 to Week 32) per planned analysis for this outcome measure (OM).

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. Data reported collectively for Part I and Part IIa (that is from Week 0 to Week 32) per planned analysis for this OM.

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 100 response represents participants who achieved a 100% improvement from baseline in the PASI score. Data reported collectively for Part I and Part IIa (that is from Week 0 to Week 32) per planned analysis for this OM.

DLQI is 10-item questionnaire that measures impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. DLQI produces total numeric score ranging from 0 (not at all) to 30 (very much): 0-1=no effect at all on participant's life; 2-6 =small effect on participant's life; 7-12 = moderate effect on participant's life; 13-18 =very large effect on participant's life; 19-30 =extremely large effect on participant's life. Higher score indicates low quality of life due to more severe disease. Data reported collectively for Part I and Part IIa (that is from Week 0 to Week 32) per planned analysis for this OM.

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.

The time to loss of response from Week 56 after guselkumab withdrawal at Week 100 was calculated as time from Week 56 to first onset of loss of response (PASI >5). 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.

The time to PASI>3 from Week 56 after guselkumab withdrawal at Week 100 was calculated as time from Week 56 to PASI response that is PASI >3. 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.

The time to loss of response from Week 52 after guselkumab withdrawal at Week 100 was calculated as time from Week 52 to first onset of loss of response (PASI >5). 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.

The time to PASI>3 from Week 52 after guselkumab withdrawal at Week 100 was calculated as time from Week 52 to PASI response that is PASI >3. 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.

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.

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 100 response represents participants who achieved a 100% 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 (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.

The PSSD (7-day version) is a patient-reported outcome (PRO) questionnaire designed and validated to measure the severity of psoriasis symptoms and signs for the assessment of treatment benefit. It consisted of 11 items covering symptoms (itch, pain, stinging, burning, and skin tightness) and patient-observable signs (skin dryness, cracking, scaling, shedding or flaking, redness, and bleeding) using 0 (absent) to 10 (worst imaginable) numerical rating scales for severity. Items were averaged on the daily symptom score and sign score when at least 3 items greater than or equal to (>=) 50 percentage of 5 items on these scales are answered. The average value is converted into 0-100 scoring, such that Symptom [or Sign] score=average value*10, where, 0= least severe and 100=most severe and higher score indicates more severe disease.

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

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

BSA as physical measure to define disease severity is to determine how much of the Body Surface Area (BSA) is affected by psoriasis. Involved BSA is calculated by using the palm of the participant's hand as equivalent to 1% of the BSA (rule of palm). Psoriasis affected BSA under 5% suggests mild psoriasis, a BSA of 5% to 10% is considered moderate, and an involved BSA of over 10% indicates severe psoriasis.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

The DLQI is a 10-item questionnaire that measures the impact of skin disease on participant's quality of life, can be used to assess 6 different aspects that may affect quality of life 1) symptoms and feelings, 2) daily activities, 3) leisure, 4) work or school performance, 5) personal relationships, and 6) treatment. Each question was evaluated on a 4-point scale ranging from 0 (not at all) to 3 (very much); where higher scores indicate more impact on quality of life. The DLQI produces a total numeric score that can range from 0 (not at all) to 30 (very much): 0-1 = no effect at all on the participant's life; 2-6 = small effect on the participant's life; 7-12 = moderate effect on the participant's life; 13-18 = very large effect on the participant's life; 19-30 = extremely large effect on the participant's life. A higher score indicates a low quality of life due to more severe disease.

The ss-IGA instrument is used to evaluate the disease severity of scalp psoriasis (SP). The lesions are assessed in terms of the clinical signs of redness, thickness, and scaliness which are scored as: absence of disease (0), very mild disease (1), mild disease (2), moderate disease (3), and severe disease (4).

The ss-IGA instrument is used to evaluate the disease severity of scalp psoriasis (SP). The lesions are assessed in terms of the clinical signs of redness, thickness, and scaliness which are scored as: absence of disease (0), very mild disease (1), mild disease (2), moderate disease (3), and severe disease (4).

SF-36 V2 is a generic 36-item questionnaire measuring health-related quality of life (HRQL) covering 2 summary measures: physical component summary (PCS) and mental component summary (MCS). The SF-36 consists of 8 subscales (physical function, role limitations due to physical problems, pain, general health perception, vitality, social function, role limitations due to emotional problems, and mental health). Participants self-report on items in a subscale that have between 2-6 choices per item using Likert-type responses (e.g. none of the time, some of the time, etc.). Summations of item scores of the same subscale give the subscale scores, which are transformed into a range from 0 to 100; 0 = worst HRQL, 100=best HRQL. Higher scores indicate better health status.

An adverse event (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. Treatment-emergent AEs (TEAEs) were defined as AEs that occurred during active treatment period through Week 32 after the start of initial study drug administration or AEs that were present at Baseline but worsened in severity after the start of initial study drug administration. Safety reported collectively for Part I and Part IIa (that is from Week 0 to Week 32) per planned analysis.

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. TEAEs were defined as those AEs that occurred during the active treatment period from Week 32 to Week 56 or the safety follow-up period from Week 56 through Week 64 or those AEs that were present before Week 32 but worsened in severity after Week 32.

ADRs were defined as those adverse events with causality 'very likely', 'probable', or 'possible' that occurred during the follow-up extension period from Week 64 to Week 100 or those present before Week 64 but ongoing at Week 64.