A PHASE 2, RANDOMIZED, DOUBLE BLIND, PLACEBO-CONTROLLED, STUDY TO EVALUATE THE SAFETY AND EFFICACY OF PF-06826647 IN PARTICIPANTS WITH MODERATE TO SEVERE PLAQUE PSORIASIS

Number of Participants With Treatment-Emergent Adverse Events (All-Causality), Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

An adverse event (AE) was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. A serious AE (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. In this outcome measure, an AE was considered treatment-emergent if the event started on or after the first dosing day and time/start time but before the last dose plus the lag time.

Number of Participants With Electrocardiogram (ECG) Data Meeting Pre-defined Criteria, Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

Criteria for ECG abnormalities: maximum increase PR interval increase from baseline (IFB): percent change (Pctchg) \>=25 percent (%) for baseline value of \>200 milliseconds (msec) and Pctchg\>=50% for baseline value of \<=200 msec for PR interval, a maximum IFB: Pctchg\>=50%, maximum QTcF interval (Fridericia's Correction) of 450 msec to \<=480 msec, 480 msec to \<=500 msec and a maximum change of \<30 change =\<60 or \>60 msec from baseline.

Number of Participants With Vital Sign Data Meeting Pre-defined Criteria, Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

The vital signs were obtained with participant in the seated position, after having sat calmly for at least 5 minutes. Criteria for vital signs abnormalities: sitting diastolic blood pressure (BP) \< 50 millimeter of mercury (mmHg), sitting diastolic BP change \>= 20 mmHg increase, sitting diastolic BP change \>= 20 mmHg decrease, sitting systolic BP \< 90 mmHg, sitting systolic BP change \>= 30 mmHg increase, and sitting systolic BP change \>= 30 mmHg decrease.

Number of Participants With Laboratory Test Abnormality - Hematology (Normal Baseline), Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

Following hematology parameters were analyzed for laboratory examination: hemoglobin (HGB), hematocrit, erythrocytes (Ery.), reticulocytes, Ery. mean corpuscular volume, Ery. mean corpuscular HGB, Ery. mean corpuscular HGB concentration, platelets, reticulocytes/erythrocytes, leukocytes, lymphocytes/leukocytes, neutrophils/leukocytes, basophils, basophils/leukocytes, eosinophils, eosinophils/leukocytes, monocytes, monocytes/leukocytes, activated partial thromboplastin time, prothrombin time, prothrombin international (Intl.) normalized ratio, neutrophils total count, and lymphocytes total count. LLN=lower limit of normal; ULN=upper limit of normal.

Number of Participants With Laboratory Test Abnormality - Chemistry (Normal Baseline), Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

Following clinical chemistry parameters were analyzed for laboratory examination: bilirubin, direct bilirubin, indirect bilirubin, aspartate aminotransferase, alanine aminotransferase, gamma glutamyl transferase, alkaline phosphatase, protein, albumin, blood urea nitrogen, urea, creatinine, urate, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, triglycerides, sodium, potassium, chloride, calcium, bicarbonate, glucose, creatine kinase, and cholesterol.

Percentage of Participants With a Psoriasis Area and Severity Index 90 (PASI 90) Response Up to Week 16 - Investigational Treatment Period

时间窗: Baseline up to Week 16

The PASI quantifies the severity of a participant's psoriasis based on both lesion severity and the percentage of body surface area (BSA) affected. PASI is a composite scoring by the investigator of degree of erythema, induration, and scaling (each scored separately) for each of 4 body regions (head and neck, upper limbs, trunk \[including axillae and groin\], and lower limbs \[including buttocks\]), with adjustment for the percent of BSA involved for each body region and for the proportion of the body region to the whole body. The PASI score can vary in increments of 0.1 and range from 0.0 to 72.0, with higher scores representing greater severity of psoriasis. PASI 90 response was defined as at least a 90% reduction in PASI relative to baseline. The statistical analysis was for the data at Week 16.

Number of Participants With Treatment-Emergent Adverse Events (Treatment Related), Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

Treatment-related adverse event (AE) was any untoward medical occurrence attributed to study drug in a participant who received study drug. Serious AE (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. In this outcome measure, an AE was considered treatment-emergent if the event started on or after the first dosing day and time/start time but before the last dose plus the lag time. Relatedness to investigational product (PF-06826647 or placebo) was assessed by the investigator (Yes/No). Participants with multiple occurrences of an AE within a category were counted once within the category.

Number of Participants With Laboratory Test Abnormality - Urinalysis (Normal Baseline), Week 16 to Week 40 - Extension Treatment Period

时间窗: From Week 16 to Week 40

Following urinalysis parameters were analyzed for laboratory examination: urine pH, urine glucose, urine ketones, urine protein, urine hemoglobin, urine urobilinogen, urine bilirubin, urine nitrite, urine leukocyte esterase, urine erythrocytes, urine leukocytes, urine hyaline, and urine bacteria.