Change From Baseline in DLQI at Week 16
The DLQI is a 10-item skin disease-specific questionnaire used to evaluate the impact of skin disease on health-related quality of life. The items address symptoms and feelings, daily activities, leisure, work/school, personal relationships, and issues with treatment. Questions are answered on a 4-point scale from 0 (not at all/not applicable) to 3 (very much). Item scores are added to provide a total score from 0 to 30, with higher scores indicating greater impairment of QOL. A negative change from baseline indicates improvement in quality of life.
Percent Change From Baseline in Body Surface Area (BSA) Affected by Psoriasis at Week 16
Body surface area is a measurement of involved skin. The overall BSA affected by psoriasis was estimated based on the palm area of the participant's hand (entire palmar surface or "handprint"), which equates to approximately 1% of total BSA.
Change From Baseline in Itch Numeric Rating Scale (NRS) Score at Week 16
The Itch Numeric Rating Scale (NRS) asked participants to assess the worst severity of itch experienced over the past 24 hours on an 11-point scale anchored from 0, representing 'no itching' to 10, representing 'worst itch imaginable'.
A negative change from baseline indicates improvement in itch severity.
Change From Baseline in Skin Discomfort/Pain Visual Analog Scale (VAS) at Week 16
Participants were asked to indicate their level of skin discomfort/pain in the past week by placing a vertical stroke on a 100 mm horizontal line on which the left-hand boundary (0) represents no skin discomfort/pain, and the right-hand boundary (100) represents worst possible skin discomfort/pain. The distance from the mark to the left-hand boundary was recorded.
A negative change from baseline indicates improvement in skin discomfort/pain.
Percentage of Participants Who Achieved a Psoriasis Area Severity Index (PASI) Score < 3 at Week 16
The PASI score is a measure of psoriatic disease severity taking into account qualitative lesion characteristics (erythema, thickness, and scaling) and degree of skin surface area involvement on defined anatomical regions. Erythema, thickness, and scaling are scored on a scale of 0 (none) to 4 (very severe) on 4 anatomic regions of the body: head, trunk, upper limbs, and lower limbs. Degree of involvement on each of the 4 anatomic regions is scored on a scale of 0 (no involvement) to 6 (90% to 100% involvement). The total qualitative score (sum of erythema, thickness, and scaling scores) is multiplied by the degree of involvement for each anatomic region and then multiplied by a constant and the values for each anatomic region are summed to yield the PASI score. PASI scores range from 0 to 72, with higher scores reflecting greater disease severity.
Percentage of Participants Who Achieved a Patient Benefit Index (PBI) Global Score of ≥ 1 at Week 16
The PBI is a validated patient-reported instrument to assess patient-relevant benefits of psoriasis treatment. Prior to starting study treatment, participants were asked to assess the importance of a series of treatment goals (from not important to very important) by completing the Patient Needs Questionnaire (PNQ). After a period of treatment (16 weeks), participants were then asked to assess the extent to which these goals were achieved (from not at all to very) by completing the Patient Benefit Questionnaire (PBQ). The Patient Benefit Index represents the benefits realized as a function of most important needs. The PBI score ranges from 0 (no benefit) to 4 (maximum benefit).
Percent Change From Baseline in European Quality of Life 5-Dimension (EQ-5D) VAS Score at Week 16
EQ-5D measures the participant's general health state on a vertical VAS and five quality of life domains. The EQ-5D VAS score ranges from 0 to 100, where a score of 0 indicates the worst imaginable health states and a score of 100 indicates the best imaginable health state. A positive change from baseline indicates improvement.
Percent Change From Baseline in EQ-5D Index Score at Week 16
EQ-5D measures the participants general health state as a vertical VAS and 5 quality of life domains: mobility, self-care, main activity (work, study, housework, family/leisure activities), pain/discomfort, and anxiety/depression. Each dimension is rated on three levels (no problems, some/moderate problems, extreme problems). An EQ-5D summary index is derived by applying a formula that attaches values (weights) to each of the levels in each dimension.
EQ-5D index values were derived using the UK scoring algorithm, where a higher score indicates a better health state. The range of the score is from -0.224 to 1, with 0 corresponding to death, 1 corresponding to full health, and negative numbers indicate health states worse than death. A positive change from baseline indicates improvement.
Change From Baseline in Work Productivity and Activity Impairment Questionnaire: Psoriasis (WPAI: PSO) at Week 16: Percentage Work Time Missed
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent of work time missed is derived from the number of hours of work missed due to psoriasis symptoms as a percentage of total hours that should have been worked. A higher percentage indicates more hours missed, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 16: Percentage Work Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent impairment while working was derived from the participant's assessment of the degree to which psoriasis affected their productivity while working. A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 16: Percentage Overall Work Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent overall work impairment takes into account both hours missed due to psoriasis symptoms and the participant's assessment of the degree to which psoriasis affected their productivity while working. A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 16: Percentage Activity Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent activity impairment is derived from the patient's assessment of the degree to which psoriasis affected their regular daily unpaid activities, measured on a VAS from 1 (no effect on daily activities) to 10 (psoriasis completely prevented daily activities). A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Number of Participants With Treatment-emergent Adverse Events (TEAEs) During the Placebo-controlled Period
An adverse event (AE) is any noxious, unintended, or untoward medical occurrence that may appear or worsen in a participant during a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the participant's health, including laboratory test values, regardless of etiology. Any worsening of a preexisting condition was considered an AE.
A serious adverse event (SAE) is any AE occurring at any dose that:
Resulted in death;
Was life-threatening;
Required inpatient hospitalization or prolongation of existing hospitalization;
Resulted in persistent or significant disability/incapacity;
Was a congenital anomaly/birth defect;
Constituted an important medical event. The Investigator assessed the severity/intensity of each event as mild, moderate, or severe based on level of symptoms.
Number of Participants With Marked Laboratory Abnormalities During the Placebo-controlled Period
Marked laboratory abnormalities are defined for each parameter below.
ULN = upper limit of normal
Change From Baseline in Blood Pressure During the Placebo-controlled Period
Change From Baseline in Pulse Rate During the Placebo-controlled Period
Change From Baseline in Body Weight During the Placebo-controlled Period
Change From Baseline in Waist Circumference During the Placebo-controlled Period
Percentage of Participants Who Achieved a ≥ 4-point Reduction From Baseline in DLQI at Weeks 32 and 52
The DLQI is a 10-item skin disease-specific questionnaire used to evaluate the impact of skin disease on health-related quality of life (QOL). The items address symptoms and feelings, daily activities, leisure, work/school, personal relationships, and issues with treatment. Questions are answered on a 4-point scale from 0 (not at all/not applicable) to 3 (very much). Item scores are added to provide a total score from 0 to 30, with higher scores indicating greater impairment of QOL.
Change From Baseline in DLQI at Weeks 32 and 52
The DLQI is a 10-item skin disease-specific questionnaire used to evaluate the impact of skin disease on health-related quality of life. The items address symptoms and feelings, daily activities, leisure, work/school, personal relationships, and issues with treatment. Questions are answered on a 4-point scale from 0 (not at all/not applicable) to 3 (very much). Item scores are added to provide a total score from 0 to 30, with higher scores indicating greater impairment of QOL. A negative change from baseline indicates improvement in quality of life.
Change From Baseline in Itch NRS Score at Weeks 32 and 52
The Itch Numeric Rating Scale (NRS) asked participants to assess the worst severity of itch experienced over the past 24 hours on an 11-point scale anchored from 0, representing 'no itching' to 10, representing 'worst itch imaginable'.
A negative change from baseline indicates improvement in itch severity.
Change From Baseline in Skin Discomfort/Pain VAS at Weeks 32 and 52
Participants were asked to indicate their level of skin discomfort/pain in the past week by placing a vertical stroke on a 100 mm horizontal line on which the left-hand boundary (0) represents no skin discomfort/pain, and the right-hand boundary (100) represents worst possible skin discomfort/pain. The distance from the mark to the left-hand boundary was recorded.
A negative change from baseline indicates improvement in skin discomfort/pain.
Percent Change From Baseline in BSA Affected by Psoriasis at Weeks 32 and 52
Body surface area is a measurement of involved skin. The overall BSA affected by psoriasis was estimated based on the palm area of the participant's hand (entire palmar surface or "handprint"), which equates to approximately 1% of total BSA.
Percentage of Participants Who Achieved a PBI Score of ≥ 1 at Weeks 32 and 52
The PBI is a validated patient-reported instrument to assess patient-relevant benefits of psoriasis treatment. Prior to starting study treatment, participants were asked to assess the importance of a series of treatment goals (from not important to very important) by completing the Patient Needs Questionnaire (PNQ). After a period of treatment (32 weeks and 52 weeks), participants were then asked to assess the extent to which these goals were achieved (from not at all to very) by completing the Patient Benefit Questionnaire (PBQ). The Patient Benefit Index represents the benefits realized as a function of most important needs. The PBI score ranges from 0 (no benefit) to 4 (maximum benefit).
Percentage of Participants Who Achieved a PASI Score < 3 at Weeks 32 and 52
The PASI score is a measure of psoriatic disease severity taking into account qualitative lesion characteristics (erythema, thickness, and scaling) and degree of skin surface area involvement on defined anatomical regions. Erythema, thickness, and scaling are scored on a scale of 0 (none) to 4 (very severe) on 4 anatomic regions of the body: head, trunk, upper limbs, and lower limbs. Degree of involvement on each of the 4 anatomic regions is scored on a scale of 0 (no involvement) to 6 (90% to 100% involvement). The total qualitative score (sum of erythema, thickness, and scaling scores) is multiplied by the degree of involvement for each anatomic region and then multiplied by a constant and the values for each anatomic region are summed to yield the PASI score. PASI scores range from 0 to 72, with higher scores reflecting greater disease severity.
Percent Change From Baseline in EQ-5D VAS Score at Week 52
EQ-5D measures the participant's general health state on a vertical VAS and five quality of life domains. The EQ-5D VAS score ranges from 0 to 100, where a score of 0 indicates the worst imaginable health states and a score of 100 indicates the best imaginable health state. A positive change from baseline indicates improvement.
Percent Change From Baseline in EQ-5D Index Score at Week 52
EQ-5D measures the participants general health state as a vertical VAS and 5 quality of life domains: mobility, self-care, main activity (work, study, housework, family/leisure activities), pain/discomfort, and anxiety/depression. Each dimension is rated on three levels (no problems, some/moderate problems, extreme problems). An EQ-5D summary index is derived by applying a formula that attaches values (weights) to each of the levels in each dimension.
EQ-5D index values were derived using the UK scoring algorithm, where a higher score indicates a better health state. The range of the score is from -0.224 to 1, with 0 corresponding to death, 1 corresponding to full health, and negative numbers indicate health states worse than death. A positive change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 52: Percentage Work Time Missed
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent of work time missed is derived from the number of hours of work missed due to psoriasis symptoms as a percentage of total hours that should have been worked. A higher percentage indicates more hours missed, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 52: Percentage Work Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent impairment while working was derived from the participant's assessment of the degree to which psoriasis affected their productivity while working. A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 52: Percentage Overall Work Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent overall work impairment takes into account both hours missed due to psoriasis symptoms and the participant's assessment of the degree to which psoriasis affected their productivity while working. A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Change From Baseline in WPAI: PSO at Week 52: Percentage Activity Impairment
The WPAI: PSO is a self-administered questionnaire designed to address impairment to the work productivity and activity of participants due to psoriasis in the past 7 days. Percent activity impairment is derived from the patient's assessment of the degree to which psoriasis affected their regular daily unpaid activities, measured on a VAS from 1 (no effect on daily activities) to 10 (psoriasis completely prevented daily activities). A higher percentage indicates greater impairment and less productivity, and a negative change from baseline indicates improvement.
Number of Participants With TEAEs During Apremilast Treatment
An AE is any noxious, unintended, or untoward medical occurrence that may appear or worsen in a participant during a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the participant's health, including laboratory test values, regardless of etiology. Any worsening of a preexisting condition was considered an AE.
A serious adverse event (SAE) is any AE occurring at any dose that:
Resulted in death;
Was life-threatening;
Required inpatient hospitalization or prolongation of existing hospitalization;
Resulted in persistent or significant disability/incapacity;
Was a congenital anomaly/birth defect;
Constituted an important medical event. The Investigator assessed the severity/intensity of each event as mild, moderate, or severe based on level of symptoms.
Number of Participants With Marked Laboratory Abnormalities During Apremilast Treatment
Change From Baseline in Blood Pressure at End of Apremilast Extension Period
Change From Baseline in Pulse Rate at End of Apremilast Extension Period
Change From Baseline in Body Weight at End of Apremilast Extension Period
Change From Baseline in Waist Circumference at End of Apremilast Extension Period