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Chronic Spontaneous UrticariaPhase 3omalizumabNCT04426890

To Compare Efficacy and Safety of CT-P39 and EU-approved Xolair in Patients With Chronic Spontaneous Urticaria

A Phase 3 study testing CT-P39 and EU-approved Xolair in people with Chronic Spontaneous Urticaria, run by Celltrion at 1 site in Poland.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

A Double-blind, Randomized, Active-controlled, Parallel Group, Phase 3 Study to Compare Efficacy and Safety of CT-P39 and Xolair in Patients with Chronic Spontaneous Urticaria Who Remain Symptomatic despite H1 antihistamine Treatment Read more about this study

Who is it for?
Ages 12 to 75 years
Conditions the study is for
Chronic Spontaneous Urticaria
What is being tested?
CT-P39 and EU-approved Xolair
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
634 participants
Where
1 sitePoland
Study dates
9 Dec 2020to 27 Apr 2023
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 12 to 75 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Diagnosed with CSU
  • Diagnosed as CSU refractory to H1-antihistamine

Who cannot join

  • Chronic urticaria with clearly defined underlying etiology
  • Clinically significant allergic reaction and/or hypersensitivity to any component of omalizumab
  • History of anaphylactic shock
  • History of and/or concomitant immune complex disease (including Type III hypersensitivity)
  • Parasitic diseases or colonization on stool evaluation for ova and parasites
  • Unable to receive background therapy with protocol-defined antihistamines or contraindicated to epinephrine

Trial locations and contacts

1 site in 1 country.

Poland1 site
  • Klinika Ambroziak ESTEDERM

    Warsaw

Other trials in Poland

About this study

Official title: A Double-blind, Randomized, Active-controlled, Parallel Group, Phase 3 Study to Compare Efficacy and Safety of CT-P39 and Xolair in Patients With Chronic Spontaneous Urticaria Who Remain Symptomatic Despite H1 Antihistamine Treatment

A Double-blind, Randomized, Active-controlled, Parallel Group, Phase 3 Study to Compare Efficacy and Safety of CT-P39 and Xolair in Patients with Chronic Spontaneous Urticaria Who Remain Symptomatic despite H1 antihistamine Treatment

Read the detailed description

CT-P39, containing the active ingredient omalizumab, is a recombinant humanized monoclonal antibody that is being developed and manufactured as a proposed biosimilar to Xolair (omalizumab) by the Sponsor. CT-P39 is identical to Xolair with respect to concentration and presentation. The 150 mg of drug product (CT-P39) will have the same pharmaceutical form and strength as 150 mg Xolair (in a prefilled syringe [PFS] for subcutaneous injection) and is intended to have a similar quality profile compared with Xolair.

Being tested
CT-P39, EU-approved Xolair
Keywords
Chronic Spontaneous Urticaria
Medical subject headings
Chronic Urticaria

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • CT-P39Biological

    Also called Omalizumab

    Prefilled syringe (PFS) of 1 mL solution

  • EU-approved XolairBiological

    Also called Omalizumab

    Prefilled syringe (PFS) of 1 mL solution

Study groups in NCT04426890
Study groupRoleWhat they receive
Arm 1ExperimentalPlanned to receive CT-P39 300 mg every 4 weeks in Treatment Period 1 (TP1) and maintain CT-P39 300 mg in TP2
Receives: Biological: CT-P39
Arm 2Active comparatorPlanned to receive Xolair 300 mg every 4 weeks in TP1 and be re-randomized at Week 12 to Arm 2-1 or Arm 2-2
Receives: Biological: EU-approved Xolair
Arm 2-1Active comparatorPlanned to receive Xolair 300 mg every 4 weeks in TP1 and be re-randomized to switch to CT-P39 300 mg in TP2
Receives: Biological: CT-P39; Biological: EU-approved Xolair
Arm 2-2Active comparatorPlanned to receive Xolair 300 mg every 4 weeks in TP1 and be re-randomized to maintain Xolair 300 mg in TP2
Receives: Biological: EU-approved Xolair
Arm 3ExperimentalPlanned to receive CT-P39 150 mg every 4 weeks in Treatment Period 1 (TP1) and increase to CT-P39 300 mg in TP2
Receives: Biological: CT-P39
Arm 4Active comparatorPlanned to receive Xolair 150 mg every 4 weeks in Treatment Period 1 (TP1) and increase to Xolair 300 mg in TP2
Receives: Biological: EU-approved Xolair

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Therapeutic Equivalence Based on Change From Baseline in ISS7 at Week 12 in 300 mg Groups

    The primary efficacy evaluation was comparison of mean change from baseline in ISS7 of 300 mg of CT-P39 (Arm 1) and 300 mg of Xolair (Arm 2) at Week 12, calculated as ISS7 at Week 12 minus the baseline ISS7. The ISS was recorded twice daily (morning and evening) in the patient eDiary, on scale of 0 (none) to 3 (severe) points. The daily ISS is the average of the morning and evening scores and the ISS7 is the sum of the daily ISS over 7 days. The ISS7 can range from 0 to 21. The higher scores mean a worse outcome.

    The analysis was conducted by analysis of covariance (ANCOVA). The ANCOVA model included the treatment group as a fixed effect and baseline ISS7, body weight on Day 1 and country as covariates.

    Measured: Week 12

  2. Relative Potency of CT-P39 Compared With Xolair Based on Change From Baseline in ISS7 at Week 12

    The ISS was recorded twice daily (morning and evening) in the patient eDiary, on scale of 0 (none) to 3 (severe) points. The daily ISS is the average of the morning and evening scores and the ISS7 is the sum of the daily ISS over 7 days. The ISS7 can range from 0 to 21. The higher scores mean a worse outcome.

    The relative potency was not calculated due to the assumption of parallel-line assay not being met. A parallel-line assay assumes that dose-efficacy response relationships are linear and parallel on log-dose scale which requires the equal slope in the regression model used to estimate relative potency. However, the slopes of the two treatment groups were estimated to be different, indicating a violation of the parallelism assumption. As a result, the relative potency was not computed.

    Measured: Week 12

Secondary outcomes (21)
  1. Change From Baseline in Weekly Itch Severity Score (ISS7) at Week 12

    The change from baseline in ISS7 at Week 12 was calculated as ISS7 at Week 12 minus the baseline ISS7. The ISS was recorded twice daily (morning and evening) in the patient eDiary, on scale of 0 (none) to 3 (severe) points. The daily ISS is the average of the morning and evening scores and the ISS7 is the sum of the daily ISS over 7 days. The ISS7 can range from 0 to 21. The higher scores mean a worse outcome. The relative potency based on the CFB of ISS7 at Week 12 was not calculated due to assumption of parallel-line assay not being met.

    Measured: Week 12

  2. Change From Baseline in Weekly Itch Severity Score (ISS7) at Week 24

    The change from baseline in ISS7 at Week 24 was calculated as ISS7 at Week 24 minus the baseline ISS7. The ISS was recorded twice daily (morning and evening) in the patient eDiary, on scale of 0 (none) to 3 (severe) points. The daily ISS is the average of the morning and evening scores and the ISS7 is the sum of the daily ISS over 7 days. The ISS7 can range from 0 to 21. The higher scores mean a worse outcome.

    Measured: Week 24

  3. Time to Minimally Important Difference (MID) in ISS7 by Week 12

    Time to MID response was the time (in weeks) from Day 1 to the study week when reduction of 5 points or more from baseline for ISS7 was first achieved up to Week 12. If a patient failed to achieve an MID response up to Week 12 or terminated the study prior to Week 12 without achieving MID response, the patient was censored at the date (in weeks) of the last non-missing ISS7 evaluation. Time to MID was estimated by Kaplan-Meier method. The lower result means a better outcome.

    Measured: Up to Week 12

  4. Percentage of Minimally Important Difference (MID) Responders in ISS7 at Week 12

    Number of patients who achieved MID response at Week 12 were presented. MID response is a change from baseline in ISS7 of ≤ -5. If a patient had missing weekly scores for the given week the patient was classified as a non-responder. The higher percentage means a better outcome.

    Measured: Week 12

  5. Change From Baseline in Weekly Hives Severity Score (HSS7) at Week 12

    The change from baseline in HSS7 at Week 12 was calculated as HSS7 at Week 12 minus the baseline HSS7. The HSS was counted twice daily (morning and evening) in the patient eDiary, on a scale of 0 (none) to 3 (intense) points. The daily HSS is the average of the morning and evening scores, and the HSS7 is the sum of the daily HSS over 7 days. HSS7 can range from 0 to 21. The higher scores mean a worse outcome.

    Measured: Week 12

  6. Change From Baseline in Weekly Hives Severity Score (HSS7) at Week 24

    The change from baseline in HSS7 at Week 24 was calculated as HSS7 at Week 24 minus the baseline HSS7. The HSS was counted twice daily (morning and evening) in the patient eDiary, on a scale of 0 (none) to 3 (intense) points. The daily HSS is the average of the morning and evening scores, and the HSS7 is the sum of the daily HSS over 7 days. HSS7 can range from 0 to 21. The higher scores mean a worse outcome.

    Measured: Week 24

  7. Change From Baseline in Weekly Urticaria Activity Score (UAS7) at Week 12

    The change from baseline in UAS7 at Week 12 was calculated as UAS7 at Week 12 minus the baseline UAS7. The UAS was calculated as the sum of the ISS and the HSS by diary-based documentation. The sum of the scores represented disease severity on a scale from 0 (minimum) to 6 (maximum). The daily UAS is the average of the morning and evening scores and the UAS7 is the sum of the daily UAS over 7 days. UAS7 can range from 0 to 42. The higher scores mean a worse outcome.

    Measured: Week 12

  8. Change From Baseline in Weekly Urticaria Activity Score (UAS7) at Week 24

    The change from baseline in UAS7 at Week 24 was calculated as UAS7 at Week 24 minus the baseline UAS7. The UAS was calculated as the sum of the ISS and the HSS by diary-based documentation. The sum of the scores represented disease severity on a scale from 0 (minimum) to 6 (maximum). The daily UAS is the average of the morning and evening scores and the UAS7 is the sum of the daily UAS over 7 days. UAS7 can range from 0 to 42. The higher scores mean a worse outcome.

    Measured: Week 24

  9. Percentage of Patients With UAS7 of ≤ 6 Points and Complete Responders in Weekly Urticaria Activity Score at Week 12

    Percentage of patients with Weekly Urticaria Activity Score (UAS7) of ≤ 6 points and complete responders (UAS7 = 0) at Week 12 is presented. If a patient had missing weekly scores for the given week the patient was classified as a non-responder. UAS7 can range from 0 to 42. The higher result means a better outcome.

    Measured: Week 12

  10. Percentage of Patients With UAS7 of ≤ 6 Points and Complete Responders in Weekly Urticaria Activity Score at Week 24

    The number of patients with Weekly Urticaria Activity Score (UAS7) of ≤ 6 points and complete responders (UAS7 = 0) at Week 24 is presented. If a patient had missing weekly scores for the given week the patient was classified as a non-responder. UAS7 can range from 0 to 42. The higher result means a better outcome.

    Measured: Week 24

  11. Percentage of Angioedema-Free Days From Week 4 to Week 12

    The proportion of angioedema-free days from Week 4 to Week 12 is defined as the number of days for which the patient indicated a 'No' response to the angioedema question in the patient eDiary divided by the total number of days with a non-missing diary entry starting on Week 4 visit date and ending the day prior to Week 12 visit date. Patients who had missing responses for > 40% of the daily diary entries between Week 4 visit date and Week 12 visit date were not included in this analysis. The higher result means a better outcome.

    Measured: Week 4 to 12

  12. Change From Baseline in Number of Tablets/Week of Rescue Therapy at Week 12

    The change from baseline in the number of tablets/week of rescue therapy used at Week 12 is presented. The number of tablets for each week of rescue therapy will be defined as the sum of daily use of rescue therapy over the study days which make up a given study week. The higher value means a worse outcome.

    If a subject switched rescue therapy medication and started a different medication or the prescribed dose of the rescue therapy medication changed during the study, the subject was excluded from the summary.

    Measured: Week 12

  13. Change From Baseline in Number of Tablets/Week of Rescue Therapy at Week 24

    The change from baseline in the number of tablets/week of rescue therapy used at Week 24 is presented. The number of tablets for each week of rescue therapy will be defined as the sum of daily use of rescue therapy over the study days which make up a given study week. The higher value means a worse outcome.

    If a subject switched rescue therapy medication and started a different medication or the prescribed dose of the rescue therapy medication changed during the study, the subject was excluded from the summary.

    Measured: Week 24

  14. Change From Baseline in the Overall Dermatology Life Quality Index (DLQI) Score at Week 12

    The change from baseline in mean overall DLQI score at Week 12 is presented. The DLQI is a 10-item dermatology-specific health-related questionnaire across 6 domains: symptoms and feelings, daily activities, leisure, work and school, personal relationships, and treatment. Patients rated their dermatology symptoms as well as the impact of their skin condition on various aspect of their lives. Each question is scored from 0 to 3. Overall DLQI ranges on a scale of 0 to 30. The higher result means a worse outcome.

    Measured: Week 12

  15. Change From Baseline in the Overall Dermatology Life Quality Index (DLQI) Score at Week 24

    The change from baseline in mean overall DLQI score at Week 24 is presented. The DLQI is a 10-item dermatology-specific health-related questionnaire across 6 domains: symptoms and feelings, daily activities, leisure, work and school, personal relationships, and treatment. Patients rated their dermatology symptoms as well as the impact of their skin condition on various aspect of their lives. Each question is scored from 0 to 3. Overall DLQI ranges on a scale of 0 to 30. The higher result means a worse outcome.

    Measured: Week 24

  16. Change From Baseline in the Overall Chronic Urticaria Quality of Life Questionnaire Score (CU-Q2oL) Score at Week 12

    The change from baseline in mean overall CU-Q2oL score at Week 12 is presented. The CU-Q2oL is a 23-item CSU specific health-related QoL questionnaire across 6 domains: pruritus, swelling, impact on life activities, sleep problems, limits, and looks. Patients rated their CSU symptoms and the impact of their CSU on various aspects of their lives. Each question was scored from 1 (not at all) to 5 (extremely), and overall raw score, on a scale of 23 to 115, was calculated by summing the individual raw domain scores. The higher result means a worse outcome.

    Overall raw scores of CU-Q2oL were converted to 0 to 100 point scores according to the following formula:[(sum of items - minimum) / (maximum - minimum)] × 100, where minimum=23 (1 score for all 23 items), maximum=115 (5 score for all 23 items).

    Measured: Week 12

  17. Change From Baseline in the Overall Chronic Urticaria Quality of Life Questionnaire Score (CU-Q2oL) Score at Week 24

    The change from baseline in mean overall CU-Q2oL score at Week 24 is presented. The CU-Q2oL is a 23-item CSU specific health-related QoL questionnaire across 6 domains: pruritus, swelling, impact on life activities, sleep problems, limits, and looks. Patients rated their CSU symptoms and the impact of their CSU on various aspects of their lives. Each question was scored from 1 (not at all) to 5 (extremely), and overall raw score, on a scale of 23 to 115, was calculated by summing the individual raw domain scores. The higher result means a worse outcome.

    Overall raw scores of CU-Q2oL were converted to 0 to 100 point scores according to the following formula: [(sum of items - minimum) / (maximum - minimum)] × 100, where minimum=23 (1 score for all 23 items), maximum=115 (5 score for all 23 items)

    Measured: Week 24

  18. Trough Serum Concentration (Ctrough) of Omalizumab at Week 12

    All concentration below lower limit of quantification (BLQ) values were treated as zero (0) for PK parameter summary. Below lower limit of quantification (BLQ) is treated as zero (0).

    Measured: Week 12

  19. Trough Serum Concentration (Ctrough) of Omalizumab at Week 24

    All concentration below lower limit of quantification (BLQ) values were treated as zero (0) for PK parameter summary. Below lower limit of quantification (BLQ) is treated as zero (0).

    Measured: Week 24

  20. Immunogenicity Result at Week 12

    Anti-drug Antibody test involved both screening and confirmatory assays to confirm true positive results. Samples that are positive in the screening assay underwent further testing in the confirmatory assay to determine if patients are true positive. Samples that are positive in the ADA confirmatory assay were analyzed further to conduct a NAb assessment.

    Measured: Week 12

  21. Immunogenicity Result at Week 24

    Anti-drug Antibody test involved both screening and confirmatory assays to confirm true positive results. Samples that are positive in the screening assay underwent further testing in the confirmatory assay to determine if patients are true positive. Samples that are positive in the ADA confirmatory assay were analyzed further to conduct a NAb assessment.

    Measured: Week 24

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted11 Jun 2020
  2. Study start9 Dec 2020
  3. Primary completion21 Oct 2022
  4. Study completion27 Apr 2023

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
634 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04426890
Sponsor's protocol ID
CT-P39 3.1
Other IDs
2020-000952-36
Acronym
omalizumab
Status last verified
Jul 2025
First submitted
3 Jun 2020
Last updated
29 Jul 2025
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing CT-P39 and EU-approved Xolair in people with Chronic Spontaneous Urticaria, run by Celltrion at 1 site in Poland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 29 Jul 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Poland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 29 Jul 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Therapeutic Equivalence Based on Change From Baseline in ISS7 at Week 12 in 300 mg Groups (time frame: Week 12). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Jul 2025.

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