A Phase 2b Study of Baricitinib in Participants With Moderate to Severe Psoriasis

The sPGA is a physician's determination of the participant's psoriasis lesions overall at a given time point categorized by descriptions for induration, erythema, and scaling. For the analysis of responses, the participant's psoriasis is assessed as clear (0), minimal (1), mild (2), moderate (3), severe (4), or very severe (5). An sPGA (0,1) response was defined as a post-baseline sPGA score of 0 or 1 with at least a 2-point improvement from baseline in sPGA score.

The sPGA is a physician's determination of the participant's psoriasis lesions overall at a given time point categorized by descriptions for induration, erythema, and scaling. For the analysis of responses, the participant's psoriasis is assessed as clear (0), minimal (1), mild (2), moderate (3), severe (4), or very severe (5). An sPGA (0,1) response was defined as a post-baseline sPGA score of 0 or 1 with at least a 2-point improvement from baseline in sPGA score.

The sPGA is a physician's determination of the participant's psoriasis lesions overall at a given time point categorized by descriptions for induration, erythema, and scaling. For the analysis of responses, the participant's psoriasis is assessed as clear (0), minimal (1), mild (2), moderate (3), severe (4), or very severe (5). An sPGA (0,1) response was defined as a post-baseline sPGA score of 0 or 1 with at least a 2-point improvement from baseline in sPGA score.

The PASI combines assessments of the extent of body-surface involvement in 4 anatomical regions (head, trunk, arms, and legs) and the severity of desquamation, erythema, and plaque induration/infiltration (thickness) in each region, yielding an overall score of 0 for no Ps to 72 for the most severe disease. Least Squares Means (LS Means) were calculated using an analysis of covariance (ANCOVA) model on the last observation carried forward (LOCF) with treatment group as a fixed effect and baseline PASI score as a continuous covariate.

The PASI combines assessments of the extent of body-surface involvement in 4 anatomical regions (head, trunk, arms, and legs) and the severity of desquamation, erythema, and plaque induration/infiltration (thickness) in each region, yielding an overall score of 0 for no Ps to 72 for the most severe disease.

The PASI combines assessments of the extent of body-surface involvement in 4 anatomical regions (head, trunk, arms, and legs) and the severity of desquamation, erythema, and plaque induration/infiltration (thickness) in each region, yielding an overall score of 0 for no Ps to 72 for the most severe disease.

The DLQI is a simple, participant-administered, 10 question, validated, quality-of-life questionnaire that covers 6 domains: symptoms and feelings, daily activities, leisure, work and school, personal relationships, and treatment. Response categories include "not at all," "a lot," and "very much," with corresponding scores of 1, 2, and 3, respectively, and unanswered ("not relevant") responses scored as "0." Totals range from 0 to 30 (less to more impairment), and a 5 point change from baseline is considered clinically relevant. Least Square (LS) Means in total DLQI score were calculated using Mixed Model Repeated Measures (MMRM) with baseline score as covariate, treatment, pooled center, visit and treatment-by-visit interaction as fixed effects.

The DLQI is a simple, participant-administered, 10 question, validated, quality-of-life questionnaire that covers 6 domains: symptoms and feelings, daily activities, leisure, work and school, personal relationships, and treatment. Response categories include "not at all," "a lot," and "very much," with corresponding scores of 1, 2, and 3, respectively, and unanswered ("not relevant") responses scored as "0." Totals range from 0 to 30 (less to more impairment), and a 5 point change from baseline is considered clinically relevant.

The DLQI is a simple, participant-administered, 10 question, validated, quality-of-life questionnaire that covers 6 domains: symptoms and feelings, daily activities, leisure, work and school, personal relationships, and treatment. Response categories include "not at all," "a lot," and "very much," with corresponding scores of 1, 2, and 3, respectively, and unanswered ("not relevant") responses scored as "0." Totals range from 0 to 30 (less to more impairment), and a 5 point change from baseline is considered clinically relevant.

The Itch NRS is a participant-administered, 11-point horizontal scale anchored at 0 and 10, with 0 representing "no itch" and 10 representing "worst itch imaginable." Overall severity of a participant's itching from Ps is indicated by circling the number that best describes the worst level of itching in the past 24 hours. LS Means were calculated using MMRM with baseline score as covariate, treatment, pooled center, visit and treatment-by-visit interaction as fixed effects.

The Itch NRS is a participant-administered, 11-point horizontal scale anchored at 0 and 10, with 0 representing "no itch" and 10 representing "worst itch imaginable." Overall severity of a participant's itching from Ps is indicated by circling the number that best describes the worst level of itching in the past 24 hours.

The Itch NRS is a participant-administered, 11-point horizontal scale anchored at 0 and 10, with 0 representing "no itch" and 10 representing "worst itch imaginable." Overall severity of a participant's itching from Ps is indicated by circling the number that best describes the worst level of itching in the past 24 hours.

The 16-item QIDS-SR16 version is a widely used validated scale designed to assess the severity of depressive symptoms. The participant was asked to rate the severity and frequency of specific symptoms present over the last 7 days. The QIDS-SR16 total scores range from 0 to 27, where higher scores indicate higher severity of symptoms. LS Means were calculated using MMRM with baseline score as covariate, treatment, pooled center, visit and treatment-by-visit interaction as fixed effects.

The QIDS-SR16 is a 16-item, self-report instrument intended to assess the existence and severity of symptoms of depression as listed in the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) (APA 1994). A participant is asked to consider each statement as it relates to the way they have felt for the past 7 days. There is a 4-point scale for each item ranging from 0 to 3. The 16 items corresponding to 9 depression domains are summed to give a single score ranging from 0 to 27, with higher scores denoting greater symptom severity. The domains assessed by the instrument include: (1) sad mood, (2) concentration, (3) self-criticism, (4) suicidal ideation, (5) interest, (6) energy/fatigue, (7) sleep disturbance (initial, middle, and late insomnia or hypersomnia), (8) decrease/increase in appetite/weight, and (9) psychomotor agitation/retardation.

The QIDS-SR16 is a 16-item, self-report instrument intended to assess the existence and severity of symptoms of depression as listed in the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) (APA 1994). A participant is asked to consider each statement as it relates to the way they have felt for the past 7 days. There is a 4-point scale for each item ranging from 0 to 3. The 16 items corresponding to 9 depression domains are summed to give a single score ranging from 0 to 27, with higher scores denoting greater symptom severity. The domains assessed by the instrument include: (1) sad mood, (2) concentration, (3) self-criticism, (4) suicidal ideation, (5) interest, (6) energy/fatigue, (7) sleep disturbance (initial, middle, and late insomnia or hypersomnia), (8) decrease/increase in appetite/weight, and (9) psychomotor agitation/retardation.

The EQ-5D-5L is a standardized measure of health status of the participant. One of two portions of the EQ-5D-5L was used in which a self-perceived health score is assessed using a visual analogue scale (VAS) that ranged from 0 to 100 millimeter (mm), where 0 mm indicated the "worst health you can imagine" and 100 mm indicated the "best health you can imagine". This information is used as a quantitative measure of health outcome. LS Means were calculated using MMRM with baseline score as covariate, treatment, pooled center, visit and treatment-by-visit interaction as fixed effects.

The EQ-5D-5L is a standardized measure of health status of the participant. One of two portions of the EQ-5D-5L was used in which a self-perceived health score is assessed using a visual analogue scale (VAS) that ranged from 0 to 100 millimeter (mm), where 0 mm indicated the "worst health you can imagine" and 100 mm indicated the "best health you can imagine". This information is used as a quantitative measure of health outcome.

The EQ-5D-5L is a standardized measure of health status of the participant. One of two portions of the EQ-5D-5L was used in which a self-perceived health score is assessed using a visual analogue scale (VAS) that ranged from 0 to 100 millimeter (mm), where 0 mm indicated the "worst health you can imagine" and 100 mm indicated the "best health you can imagine". This information is used as a quantitative measure of health outcome.

Rebound was defined as worsening of psoriasis compared to baseline at Week 0 (for example, PASI score >125% of baseline value) or new pustular, erythrodermic, or more inflammatory psoriasis occurring within 3 months of stopping study drug.