Observational Study to Assess the Effectiveness, Safety Profile and Real-life Prescribing and Utilization Patterns of Tildrakizumab (Ilumetri®) in Patients With Moderate to Severe Plaque Psoriasis in Routine Clinical Practice. (SAIL)

Cohort 1: Absolute Psoriasis Area and Severity Index (PASI) Score at Week 48

Time Frame: At Week 48

The PASI was calculated by assessing four body regions: head (10 percent \[%\] of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes.

Cohort 1: Absolute Psoriasis Area and Severity Index (PASI) Score at Week 96

Time Frame: At Week 96

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes.

Cohort 1: Change From Baseline in Psoriasis Area and Severity Index (PASI) Score at Week 48

Time Frame: Baseline (current study), Week 48

PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 1: Change From Baseline in Psoriasis Area and Severity Index (PASI) Score at Week 96

Time Frame: Baseline (current study), Week 96

PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 1: Correlation Between Absolute Psoriasis Area and Severity Index (PASI) Scores and Dermatology Life Quality Index Adjusted for Not Relevant Responses (DLQI-R) Scores at Week 48

Time Frame: At Week 48

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). The range of the PASI scale was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. The DLQI questionnaire consisted of 10 questions. Each question was scored from 0 to 3, giving a total score range from 0 (meaning no impact of skin disease on quality of life) to 30 (meaning maximum impact on quality of life), where higher score indicates severe impact on quality of life. The DLQI-R was a newly introduced variation of the regular DLQI that adjusted the total score for the number of not relevant responses and a valid scoring system for avoiding the bias of these not relevant responses of the questionnaire. Pearson correlation was performed for correlation analysis.

Cohort 1: Correlation Between Absolute Psoriasis Area and Severity Index Scores and Dermatology Life Quality Index Adjusted for Not Relevant Responses (DLQI-R) at Week 96

Time Frame: At Week 96

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). The range of the PASI scale was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. The DLQI questionnaire consisted of 10 questions. Each question was scored from 0 to 3, giving a total score range from 0 (meaning no impact of skin disease on quality of life) to 30 (meaning maximum impact on quality of life), where higher score indicates severe impact on quality of life. The DLQI-R was a newly introduced variation of the regular DLQI that adjusted the total score for the number of not relevant responses and a valid scoring system for avoiding the bias of these not relevant responses of the questionnaire. Pearson correlation was performed for correlation analysis.

Cohort 1: Percentage of Participants Who Maintained Psoriasis Area and Severity Index (PASI) 75, 90, and 100 Responses at Week 48

Time Frame: At Week 48

PASI 75 and 90 defined as percentage of participants who achieved \>=75% and \>=90% reductions, respectively in their PASI score from baseline. PASI 100 defined as percentage of participants who have achieved a complete resolution of all disease. PASI was calculated by assessing 4 body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters measured on a scale of 0 to 4. Sum of all 3 severity parameters was then calculated for each section of skin, multiplied by area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). PASI range was from 0 (no psoriasis) to 72 (most severe case).

Cohort 1: Percentage of Participants Who Maintained Psoriasis Area and Severity Index (PASI) 75, 90, and 100 Responses at Week 96

Time Frame: At Week 96

PASI 75 and 90 defined as percentage of participants who achieved \>=75% and \>=90% reductions, respectively in their PASI score from baseline. PASI 100 defined as percentage of participants who achieved a complete resolution of all disease. PASI was calculated by assessing 4 body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters measured on a scale of 0 to 4. Sum of all 3 severity parameters was then calculated for each section of skin, multiplied by area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). PASI range was from 0 (no psoriasis) to 72 (most severe case).

Cohort 1: Percentage of Absolute Body Surface Area Affected by Psoriasis (BSA) at Week 48

Time Frame: At Week 48

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage.

Cohort 1: Percentage of Absolute Body Surface Area Affected by Psoriasis (BSA) at Week 96

Time Frame: At Week 96

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage.

Cohort 1: Change From Baseline of reSURFACE Study in Percentage of Body Surface Area (BSA) Affected by Psoriasis at Week 48

Time Frame: Baseline (Day 0 of reSURFACE Studies), Week 48 (Current study)

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage. Baseline value of reSURFACE Studies was used to calculate change at Week 48 of current study. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration (also if participant participated in tildrakizumab \[reSURFACE\] clinical trials).

Cohort 2: Absolute Psoriasis Area and Severity Index (PASI) Score at Week 52

Time Frame: At Week 52

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes.

Cohort 1: Change From Baseline of reSURFACE Study in Percentage of Body Surface Area (BSA) Affected by Psoriasis at Week 96

Time Frame: Baseline (Day 0 of reSURFACE Studies), Week 96 (Current Study)

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage. Baseline value of reSURFACE Studies was used to calculate change at Week 96 of current study. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration (also if participant participated in tildrakizumab \[reSURFACE\] clinical trials).

Cohort 1: Absolute Physician's Global Assessment (PGA) (General, Nail, Scalp) Scores at Week 48

Time Frame: At Week 48

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes.

Cohort 1: Absolute Physician's Global Assessment (PGA) (General, Nail, Scalp) Scores at Week 96

Time Frame: At Week 96

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes.

Cohort 1: Change From Baseline (reSURFACE Studies for General and Current Study for Nail and Scalp) in Physician's Global Assessment (PGA) Score at Week 48

Time Frame: Baseline (Day 0 of reSURFACE Studies for General and current study for Nail and Scalp), Week 48 (Current Study)

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes. Baseline value of reSURFACE Studies was used to calculate change for "General" at Week 48 of current study. For "Nail" and "Scalp", Baseline value of current study was used to calculate change. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration (also if participant participated in tildrakizumab \[reSURFACE\] clinical trials).

Cohort 1: Change From Baseline (reSURFACE Studies for General and Current Study for Nail and Scalp) in Physician's Global Assessment (PGA) Score at Week 96

Time Frame: Baseline (Day 0 of reSURFACE Studies for General and current study for Nail and Scalp), Week 96 (Current study)

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes. Baseline value of reSURFACE Studies was used to calculate change for "General" at Week 96 of current study. For "Nail" and "Scalp", Baseline value of current study was used to calculate change. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration (also if participant participated in tildrakizumab \[reSURFACE\] clinical trials).

Cohort 2: Absolute Psoriasis Area and Severity Index (PASI) Scroe at Week 100

Time Frame: At Week 100

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes.

Cohort 2: Change From Baseline in Psoriasis Area and Severity Index (PASI) Score at Week 52

Time Frame: Baseline (current study), Week 52

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 2: Change From Baseline in Psoriasis Area and Severity Index (PASI) Score at Week 100

Time Frame: Baseline (current study), Week 100

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, the area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, the severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters are measured on a scale of 0 to 4, from none to maximum. The sum of all 3 severity parameters was then calculated for each section of skin, multiplied by the area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). The range of the PASI was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 2: Correlation Between Absolute Psoriasis Area and Severity Index (PASI) Scores and Dermatology Life Quality Index Adjusted for Not Relevant Responses (DLQI-R) at Week 52

Time Frame: At Week 52

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). The range of the PASI scale was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. The DLQI questionnaire consisted of 10 questions. Each question was scored from 0 to 3, giving a total score range from 0 (meaning no impact of skin disease on quality of life) to 30 (meaning maximum impact on quality of life), where higher score indicates severe impact on quality of life. The DLQI-R was a newly introduced variation of the regular DLQI that adjusted the total score for the number of not relevant responses and a valid scoring system for avoiding the bias of these not relevant responses of the questionnaire. Pearson correlation was performed for correlation analysis.

Cohort 2: Correlation Between Absolute Psoriasis Area and Severity Index (PASI) Scores and Dermatology Life Quality Index Adjusted for Not Relevant Responses (DLQI-R) at Week 100

Time Frame: At Week 100

The PASI was calculated by assessing four body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). The range of the PASI scale was from 0 (no psoriasis on the body) to 72 (the most severe case of psoriasis), where higher score indicates severe outcomes. The DLQI questionnaire consisted of 10 questions. Each question was scored from 0 to 3, giving a total score range from 0 (meaning no impact of skin disease on quality of life) to 30 (meaning maximum impact on quality of life), where higher score indicates severe impact on quality of life. The DLQI-R was a newly introduced variation of the regular DLQI that adjusted the total score for the number of not relevant responses and a valid scoring system for avoiding the bias of these not relevant responses of the questionnaire. Pearson correlation was performed for correlation analysis.

Cohort 2: Percentage of Participants Who Maintained Psoriasis Area and Severity Index (PASI) 75, 90, and 100 Responses at Week 52

Time Frame: At Week 52

PASI 75 and 90 defined as percentage of participants who achieved \>=75% and \>=90% reductions, respectively in their PASI score from baseline. PASI 100 defined as percentage of participants who have achieved a complete resolution of all disease. PASI was calculated by assessing 4 body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters measured on a scale of 0 to 4. Sum of all 3 severity parameters was then calculated for each section of skin, multiplied by area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). PASI range was from 0 (no psoriasis) to 72 (most severe case).

Cohort 2: Percentage of Participants Who Maintained Psoriasis Area and Severity Index (PASI) 75, 90, and 100 Responses at Week 100

Time Frame: At Week 100

PASI 75 and 90 defined as percentage of participants who achieved \>=75% and \>=90% reductions, respectively in their PASI score from baseline. PASI 100 defined as percentage of participants who achieved a complete resolution of all disease. PASI was calculated by assessing 4 body regions: head (10% of skin), arms (20%), trunk (30%), and legs (40%). For each region, area of skin affected was estimated and graded on a scale from 0 to 6, where 0 indicated no involved area and 6 indicated 90-100% of involved area. Within each area, severity was estimated by 3 clinical signs: erythema (redness), induration (thickness) and desquamation (scaling). Severity parameters measured on a scale of 0 to 4. Sum of all 3 severity parameters was then calculated for each section of skin, multiplied by area score for that area and multiplied by weight of respective sections (0.1 for head, 0.2 for arms, 0.3 for body and 0.4 for legs). PASI range was from 0 (no psoriasis) to 72 (most severe case).

Cohort 2: Percentage of Absolute Body Surface Area Affected by Psoriasis (BSA) at Week 52

Time Frame: At Week 52

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage.

Cohort 2: Percentage of Absolute Body Surface Area Affected by Psoriasis (BSA) at Week 100

Time Frame: At Week 100

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage.

Cohort 2: Change From Baseline in Percentage of Body Surface Area (BSA) Affected by Psoriasis at Week 52

Time Frame: Baseline (current study), Week 52

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 2: Change From Baseline in Percentage of Body Surface Area (BSA) Affected by Psoriasis at Week 100

Time Frame: Baseline (current study), Week 100

The BSA measures the total area of the body affected by psoriasis assessed by the study physician in terms of percentage. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 2: Absolute Physician's Global Assessment (PGA) (General, Nail and Scalp) Scores at Week 52

Time Frame: At Week 52

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes.

Cohort 2: Absolute Physician's Global Assessment (PGA) (General, Nail and Scalp) Scores at Week 100

Time Frame: At Week 100

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes.

Cohort 2: Change From Baseline in Physician's Global Assessment (PGA) (General, Nail and Scalp) Scores at Week 52

Time Frame: Baseline (current study), Week 52

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.

Cohort 2: Change From Baseline in Physician's Global Assessment (PGA) (General, Nail and Scalp) Scores at Week 100

Time Frame: Baseline (current study), Week 100

The PGA is a 5-point measure of psoriasis. The PGA of psoriasis of the whole body (general), scalp and nail were made on a 5-point scale ranged from 0 to 4, where 0 = none (clear); 1 = minimal; 2 = mild; 3 = moderate; 4 = severe. The higher score indicates severe outcomes. Baseline defined as the last value measured on Day 0 (Week 0) prior to the first tildrakizumab administration.