Clinical Trial Results:
A Phase 2, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of ANB019 in the Treatment of Subjects With Ichthyosis
Summary
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EudraCT number |
2020-003476-41 |
Trial protocol |
PL |
Global end of trial date |
19 Nov 2021
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Results information
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Results version number |
v1(current) |
This version publication date |
12 May 2023
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First version publication date |
12 May 2023
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Other versions |
Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
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Trial identification
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Sponsor protocol code |
ANB019-206
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT04697056 | ||
WHO universal trial number (UTN) |
- | ||
Sponsors
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Sponsor organisation name |
AnaptysBio Inc.
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Sponsor organisation address |
10770 Wateridge Circle, Suite 210, San Diego, CA, United States, 92121
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Public contact |
Bruce Randazzo, AnaptysBio Inc., 001 (858) 362-6343, brandazzo@anaptysbio.com
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Scientific contact |
Bruce Randazzo, AnaptysBio Inc., 001 (858) 362-6343, brandazzo@anaptysbio.com
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Paediatric regulatory details
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Is trial part of an agreed paediatric investigation plan (PIP) |
No
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Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Results analysis stage
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Analysis stage |
Final
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Date of interim/final analysis |
19 Nov 2021
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Is this the analysis of the primary completion data? |
No
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Global end of trial reached? |
Yes
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Global end of trial date |
19 Nov 2021
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Was the trial ended prematurely? |
Yes
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General information about the trial
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Main objective of the trial |
To assess the effect of imsidolimab (ANB019) compared with placebo in adolescent and adult participants with ichthyosis as measured by Ichthyosis Area Severity Index (IASI) total score.
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Protection of trial subjects |
This study was performed in compliance with ethical principles that have their origin in the Declaration of Helsinki and that are consistent with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) and the applicable laws and regulations.
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Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
25 Jan 2021
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Long term follow-up planned |
No
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Independent data monitoring committee (IDMC) involvement? |
No
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Population of trial subjects
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Number of subjects enrolled per country |
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Country: Number of subjects enrolled |
United States: 5
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Worldwide total number of subjects |
5
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EEA total number of subjects |
0
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Number of subjects enrolled per age group |
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In utero |
0
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Preterm newborn - gestational age < 37 wk |
0
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Newborns (0-27 days) |
0
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Infants and toddlers (28 days-23 months) |
0
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Children (2-11 years) |
0
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Adolescents (12-17 years) |
1
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Adults (18-64 years) |
3
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From 65 to 84 years |
1
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85 years and over |
0
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Recruitment
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Recruitment details |
Participants with confirmed diagnosis of ichthyosis by genetic testing of ichthyosis were enrolled into the study. | |||||||||||||||
Pre-assignment
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Screening details |
7 participants were screened for eligibility and 5 participants were randomized into the study. | |||||||||||||||
Period 1
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Period 1 title |
Overall Study (overall period)
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Is this the baseline period? |
Yes | |||||||||||||||
Allocation method |
Randomised - controlled
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Blinding used |
Double blind | |||||||||||||||
Roles blinded |
Subject, Investigator, Carer, Assessor | |||||||||||||||
Blinding implementation details |
The Sponsor, Investigator, and participants were blinded to treatment assignment of imsidolimab or placebo. An unblinded pharmacist was responsible for study treatment dispensing.
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Arms
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Are arms mutually exclusive |
Yes
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Arm title
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Imsidolimab | |||||||||||||||
Arm description |
Participants received a starting dose of 400 milligrams (mg) of imsidolimab on Day 1 followed by 200 mg imsidolimab every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | |||||||||||||||
Arm type |
Experimental | |||||||||||||||
Investigational medicinal product name |
Imsidolimab
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Investigational medicinal product code |
ANB019
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Other name |
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Pharmaceutical forms |
Solution for injection
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Routes of administration |
Subcutaneous use
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Dosage and administration details |
Imsidolimab was administered by clinic staff trained in best practices for subcutaneous administration at starting dose of 400 mg on Day 1 followed by 200 mg imsidolimab every 4 weeks (Days 29, 57 and 85).
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Arm title
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Placebo | |||||||||||||||
Arm description |
Participants received imsidolimab matching placebo on Day 1 and thereafter, every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | |||||||||||||||
Arm type |
Placebo | |||||||||||||||
Investigational medicinal product name |
Placebo
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Solution for injection
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Routes of administration |
Subcutaneous use
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Dosage and administration details |
Participants received imsidolimab matching placebo on Day 1 and thereafter, every 4 weeks (Days 29, 57 and 85) by subcutaneous injection.
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Baseline characteristics reporting groups
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Reporting group title |
Imsidolimab
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Reporting group description |
Participants received a starting dose of 400 milligrams (mg) of imsidolimab on Day 1 followed by 200 mg imsidolimab every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Placebo
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Reporting group description |
Participants received imsidolimab matching placebo on Day 1 and thereafter, every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
Imsidolimab
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Reporting group description |
Participants received a starting dose of 400 milligrams (mg) of imsidolimab on Day 1 followed by 200 mg imsidolimab every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | ||
Reporting group title |
Placebo
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Reporting group description |
Participants received imsidolimab matching placebo on Day 1 and thereafter, every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. |
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End point title |
Change From Baseline in Ichthyosis Area Severity Index (IASI) Total Score at Week 16 [1] | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling & percentage of body surface area (BSA) affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 body regions (BR) [A1: head & neck (H&N), A2: upper limbs (UL), A3: trunk (T), A4: lower limbs (LL)]. Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%= 5, 90%-100%= 6).Total extent was determined using multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-Erythema (E)= A1E x B1 x C1 + A2E x B2 x C2 + A3E x B3 x C3 + A4E x B4 x C4 (score 0 to 24) IASI-Scaling (S)= A1S x B1 X C1 + A2S x B2 x C2 + A3S x B3 x C3 + A4S x B4 x C4 (score 0 to 24) IASI total score= IASI-E + IASIS score ranged from 0 - 48, higher score indicated worse disease state.
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End point type |
Primary
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End point timeframe |
Baseline and Week 16
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Notes [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point. Justification: No statistical analysis was performed for the primary endpoint. Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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Notes [2] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [3] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Percent Change From Baseline in IASI Total Score at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-E= A1E x B1 x C1 + A2E x B2 x C2 + A3E x B3 x C3 + A4E x B4 x C4 (score 0 to 24)
IASI-S= A1S x B1 X C1 + A2S x B2 x C2 + A3S x B3 x C3 + A4S x B4 x C4 (score 0 to 24)
IASI total score= IASI-E + IASI-S score ranged from 0 - 48, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 16
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Notes [4] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [5] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Percentage of Participants Achieving an Improvement of 50% From Baseline in IASI (IASI50) at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-E= A1E x B1 x C1 + A2E x B2 x C2 + A3E x B3 x C3 + A4E x B4 x C4 (score 0 to 24)
IASI-S= A1S x B1 X C1 + A2S x B2 x C2 + A3S x B3 x C3 + A4S x B4 x C4 (score 0 to 24)
IASI total score= IASI-E + IASI-S score ranged from 0 - 48, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Week 16
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Notes [6] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [7] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Change From Baseline in IASI-E Scores at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-E= A1E x B1 x C1 + A2E x B2 x C2 + A3E x B3 x C3 + A4E x B4 x C4
IASI-E score ranged from 0 - 24, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 16
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Notes [8] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [9] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Change From Baseline in IASI-S Scores at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-S= A1S x B1 X C1 + A2S x B2 x C2 + A3S x B3 x C3 + A4S x B4 x C4
IASI-S score ranged from 0 - 24, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 16
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Notes [10] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [11] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Percent Change From Baseline in IASI-E Scores at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-E= A1E x B1 x C1 + A2E x B2 x C2 + A3E x B3 x C3 + A4E x B4 x C4
IASI-E score ranged from 0 - 24, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 16
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Notes [12] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [13] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Percent Change From Baseline in IASI-S Scores at Week 16 | ||||||||||||
End point description |
IASI quantified the severity of participants ichthyosis based on severity of erythema/scaling, & percentage of BSA affected. Degree of erythema & scaling scored from 0 (none) to 4 (very severe) for each of 4 BR (A1: H&N, A2: UL, A3: T, A4: LL). Percentage of BSA involved for each BR (B1: % in H&N, B2: % in UL, B3: % in T, B4: % in LL). Percentage involvement was assigned numerical value (0= 0, 1%-9%= 1, 10%-29%= 2, 30%-49%= 3, 50%-69%= 4, 70%-89%=5, 90%-100%= 6). Total extent was determined using a multiplier considering % of total BSA by each BR (C1= 0.1 for H&N; C2= 0.2 for UL; C3= 0.3 for T; C4= 0.4 for LL).
IASI-S= A1S x B1 X C1 + A2S x B2 x C2 + A3S x B3 x C3 + A4S x B4 x C4
IASI-S score ranged from 0 - 24, higher score indicated worse disease state.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 16
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Notes [14] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. [15] - Due to study termination before primary endpoint, efficacy data was not collected nor analyzed. |
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No statistical analyses for this end point |
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End point title |
Number of Participants With Treatment Emergent Adverse Events (TEAEs) | ||||||||||||||||||
End point description |
An AE was any untoward medical occurrence in a participant temporally associated with the use of a study treatment, whether or not considered related to the study treatment. An AE could therefore be any unfavorable and unintended sign (including abnormal laboratory finding), symptom, or disease temporally associated with use of study treatment that did not necessarily have a causal relationship with this treatment. An AE was considered "serious" if there was any of the following outcomes: death, life-threatening adverse event, Inpatient hospitalization or prolongation of existing hospitalization, persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions, congenital anomaly/birth defect, other important medical events. An adverse event was considered TE if the date of onset was during or after first dose of study treatment, or if the AE present at baseline worsened in either intensity or frequency after first dose of study treatment.
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End point type |
Secondary
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End point timeframe |
From first dose up to study termination (maximum up to 9.4 weeks)
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No statistical analyses for this end point |
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Adverse events information
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Timeframe for reporting adverse events |
From first dose up to study termination (maximum up to 9.4 weeks)
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Adverse event reporting additional description |
Safety analysis set included all randomized participants who received at least 1 dose of imsidolimab or placebo.
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Assessment type |
Systematic | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
MedDRA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
24.1
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Reporting groups
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Reporting group title |
Imsidolimab
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Reporting group description |
Participants received a starting dose of 400 milligrams (mg) of imsidolimab on Day 1 followed by 200 mg imsidolimab every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Placebo
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Reporting group description |
Participants received imsidolimab matching placebo on Day 1 and thereafter, every 4 weeks (Days 29, 57 and 85) by subcutaneous injection. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Frequency threshold for reporting non-serious adverse events: 0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Substantial protocol amendments (globally) |
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Were there any global substantial amendments to the protocol? No | |||
Interruptions (globally) |
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Were there any global interruptions to the trial? No | |||
Limitations and caveats |
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Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
As a result of insufficient recruitment of participants, this study was terminated. |