Special Investigation in Patients With Psoriatic Arthritis (PsA) (Working Productivity and Activity Impairment [WPAI])

WPAI:PsA is a questionnaire used to evaluate lost productivity due to PsA; scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact on productivity and 100% representing complete impact on productivity. Percentage of overall work impairment due to PsA (OWI) is calculated as: Absenteeism + (1 - Absenteeism) * Presenteeism. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

WPAI:PsA is a questionnaire used to evaluate lost productivity due to PsA; scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact on productivity and 100% representing complete impact on productivity. Absenteeism (percentage of work time missed due to PsA) is calculated as the number of hours of work missed due to PsA / (number of hours of work missed due to PsA + number of hours worked) * 100. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

WPAI:PsA is a questionnaire used to evaluate lost productivity due to PsA; scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact on productivity and 100% representing complete impact on productivity. Presenteeism (percentage of impairment while working due to PsA) is calculated as the patient's rating of how much PsA affected productivity while working (0 = no effect; 10 = completely prevented from working) / 10 * 100. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

WPAI:PsA is a questionnaire used to evaluate lost productivity due to PsA; scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact on productivity and 100% representing complete impact on productivity. Activity impairment (percentage of activity impairment due to PsA) is calculated as the patient's rating of how much PsA affected their ability to do regular daily activities, other than working at a job (0 = no effect; 10 = completely prevented from working) / 10 * 100. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

The PASE is a patient-administered questionnaire used to screen patients with psoriasis for evidence of psoriatic arthritis. The PASE consists of 15 questions divided into 2 subscales (system sub-scale and function sub-scale); 7 questions assess symptoms and 8 questions assess function. Questions are scored on a numeric scale ranging from 1 (strongly disagree) to 5 (strongly agree), with a total possible PASE score of 15 to 75. Individuals who are more likely to have PsA will score higher than individuals without PsA. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

PASI is a combination of the intensity of psoriasis, assessed by the erythema (reddening), induration (plaque thickness) and desquamation (scaling) on of the lesions rated on a a scale from 0 (no symptoms) to 4 (very marked), together with the percentage of the area affected, rated on a scale from 0 (0%) to 6 (100%). PASI scoring is performed at four body areas, the head, arms, trunk, and legs. The total PASI score ranges from 0 to 72. The higher the total score, the more severe the disease. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

DAS28 (CRP) is calculated using the number of tender and swollen joints (out of 28 counted), C-reactive protein (CRP) level, and the patient's global assessment of disease activity via the visual analog scale (VAS). The calculated range of DAS28-4 is 0 to 10. A score less than 2.6 indicates clinical remission, a score of 2.6 to 3.2 indicates low disease activity, a score of 3.2 to less than 5.1 indicates moderate disease activity, and a score of 5.1 or greater indicates high disease activity. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

DAS28 (ESR) is calculated using the number of tender and swollen joints (out of 28 counted), erythrocyte sedimentation rate (ESR), and the patient's global assessment of disease activity via the visual analog scale (VAS). The calculated range of DAS28-4 is 0 to 10. A score less than 2.6 indicates clinical remission, a score of 2.6 to 3.2 indicates low disease activity, a score of 3.2 to less than 5.1 indicates moderate disease activity, and a score of 5.1 or greater indicates high disease activity. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

At each study visit, a joint evaluator assessed whether a particular joint was "tender or painful" where presence of tenderness was scored as "1" and the absence of tenderness was scored as "0," provided the joint was not replaced or could not be assessed due to other reasons. The total TJC68, which is based on 68 joints, was derived as the sum of all "1s" thus collected with no penalty considered for the joints not assessed or those which had been replaced. The range for TJC68 was 0 to 68, with a higher score indication a greater degree of tenderness. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

At each study visit, a joint evaluator assessed whether a particular joint was swollen where presence of swelling was scored as "1" and the absence of swelling was scored as "0," provided the joint was not replaced or could not be assessed due to other reasons. The total SJC66, which is based on 66 joints, was derived as the sum of all "1s" thus collected with no penalty considered for the joints not assessed or those which had been replaced. The range for SJC66 was 0 to 66, with a higher score indicating a greater degree of swelling. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

The BASDAI uses a scale from 1 (no problem) to 10 (worst problem) to answer 6 questions pertaining to the 5 major symptoms of ankylosing spondylitis: fatigue, spinal pain, joint pain/swelling, areas of localized tenderness (also called enthesitis, or inflammation of tendons and ligaments), morning stiffness duration, and morning stiffness severity. To give each symptom equal weighting, the mean (average) of the two scores relating to morning stiffness is taken. The resulting 0 to 50 score is divided by 5 to give a final BASDAI score ranging from 0-10. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

The HAQ-DI is a patient-reported outcome which is usually self-administered by the patient. The HAQ-DI assesses the categories of dressing and grooming, arising, eating, walking, hygiene, reach, grip, and common daily activities. The patients report the amount of difficulty they have in performing these activities using a scale ranging from 0 (can be performed without any difficulty) to 3 (cannot be done at all). Scores on each task were summed and averaged to provide an overall score ranging from 0 to 3, where 0 represents no disability and 3 very severe, high-dependency disability. Change from baseline was calculated as the value at baseline minus the value at each subsequent time point. A negative change represents improvement.

The percentage of participants with enthesitis.

The percentage of participants with dactylitis.

The percentage of participants with spondylitis.

The percentage of participants with nail psoriasis .

An AE is defined as any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. The investigator assessed the relationship of each event to the use of study drug as either probable, possible, not related, or impossible to judge. A serious adverse event (SAE) is an event that results in death, is life-threatening, requires or prolongs hospitalization, results in a congenital anomaly, persistent or significant disability/incapacity or is an important medical event that, based on medical judgment, may jeopardize the subject and may require medical or surgical intervention to prevent any of the outcomes listed above. Treatment-emergent events (TEAEs/TESAEs) are defined as any event that began or worsened in severity after the physician obtained the patient's authorization or informed consent until the end of the study (week 28 or discontinuation).