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NCT Number: NCT06566885

Real-world Study Assessing Efficacy of TezepeLumaB in Patients With Severe Asthma Regardless of Phenotype in Russia

ELBRUS is a 12-month (52-week), multi-centre, prospective, non-comparative and non-interventional (observational), post-reimbursement real-world evidence study that will assess patient-reported outcomes after tezepelumab treatment initiation in participants with severe asthma in Russia.

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Key information

Conditions

Severe Asthma Asthma Bronchial Diseases Hypersensitivity Hypersensitivity, Immediate Immune System Diseases Lung Diseases Lung Diseases, Obstructive Respiratory Hypersensitivity Respiratory Tract Diseases

Age range

12 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Research Site, Kaliningrad, Russia

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About this study

This is a multi-centre, retrospective-prospective, non-comparative and non-interventional (observational) cohort study involving primary and secondary data collection within real-world settings of participants who initiate tezepelumab for treatment of severe uncontrolled asthma. Participants of the study will be the patients eligible for tezepelumab treatment based on the assessment in accordance with the approved product Summary of Product Characteristics (SmPC) in Russia. The administration of tezepelumab will be independent of this study (i.e., a decision of tezepelumab initiation is based on the physician's choice and regulatory and clinical features, not on recruitment/participation in the study). Tezepelumab is indicated as an add-on maintenance treatment for severe asthma, therefore, patients will continue background asthma therapy throughout the study, irrespective of their decision to participate in this study or not.

Approximately 110 eligible participants of both sexes, aged 12 years or older will be treated with tezepelumab available in the market and according to the Russian reimbursement policies in approximately 20 sites. In eligible participants who agree to take part in the study, the enrolment date is defined as the date of informed consent or assent. After enrolment and evaluation of inclusion/exclusion criteria, study participants will commence tezepelumab treatment as per the physician's decision and following the local product SmPC. The index date is defined as the date when participants have received the first dose of tezepelumab. The enrolment period is the period between enrolment date and index date. Additionally, participants may be enrolled in this study up to 4 weeks after the first dose of tezepelumab, but no longer, to avoid responder bias.

Participants will be followed for a maximum period of 52 weeks after index date, irrespective of treatment discontinuation. Patient-reported outcomes - the primary endpoint (ACQ-5) and SNOT-22 will be retrospectively collected during enrolment for all patients (i.e. the most recent available values in the 52 weeks prior to index date), and prospectively collected at suggested visits at Weeks 4, 12, 24, and 52 following index date. For patients who initiate treatment after being enrolled into the study the baseline value may be collected prospectively after enrolment before start of treatment.

The baseline period is defined as the 52 weeks prior to the index date. Outcomes of interest, such as severe asthma exacerbations, medication use, and healthcare resource utilization, will be collected during enrolment retrospectively for the baseline period (52 weeks prior to the index date) and then prospectively at Weeks 4, 12, 24, and 52 following index date.

Overall expected duration of the study (from the first patient inclusion to the last patient last visit) is about 2 years or until 110 eligible patients are included to the study and data on these patients are collected, whichever occurs first.

As an observational, this study does not imply any intervention into a routine clinical practice, including choice of treatment modality or additional diagnostic methods.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

be eligible for enrolment into this study if all of the following criteria are met:

  • Male or female participants aged 12 years or older at the time of signing the ICF or assent.
  • Prescribed and initiated treatment with tezepelumab according to SmPC and local market reimbursement criteria. A period between treatment initiation and enrolment should be no more than 4 weeks.
  • Diagnosis of asthma established for at least 52 weeks prior to tezepelumab initiation and symptoms confirmed by the Investigator not to be due to alternative diagnoses.
  • Received at least one prescription of medium or high doses of ICS during the 52 weeks prior to tezepelumab initiation, with medium or high doses of ICS defined according to the GINA 2022 (see below Note #1).
  • Use of additional asthma maintenance controller medication(s) in addition to ICS (e.g., LABA, leukotriene receptor inhibitors, theophylline, LAMA, and cromones) for at least 52 weeks prior to tezepelumab initiation. The additional maintenance controller medication may be contained in a combination product (e.g., ICS/LABA).
  • Documented history of at least 2 severe asthma exacerbations during the 52 weeks prior to tezepelumab initiation. For participants receiving prior biologic drugs for ≥ 8 months, at least 1 severe exacerbation must have occurred on prior biologic treatment. Participants are excluded if, in the opinion of the Investigator, prior biologic treatment had provided significant clinical benefit in the past 52 weeks, despite the participant experiencing ≥ 2 severe exacerbations during 52 weeks prior to tezepelumab initiation.
  • Individuals with ACQ-5 score ≥ 1.5 (indicating inadequate asthma symptom control) at enrolment or up to 12 weeks before enrolment.
  • Currently receive care from specialist physicians (e.g., pulmonologists and/or allergists) at the Investigator's or sub-Investigator's site.
  • Provision of signed and dated written informed consent, including assent (informed consent for participants under 18 years old).
  • Participants are able to read, understand and complete the questionnaires required by the protocol.

Exclusion criteria

  • Any contraindication to tezepelumab as per the approved product SmPC in Russia or in the opinion of the Investigator.
  • Administration of concurrent biologic drug for asthma since the index date, except for stable allergen immunotherapy (defined as a stable dose and regimen at the time of enrolment). Enrolment of patients who were switched from other biologic(s) to tezepelumab is allowed, and an acceptable timeframe since the last prior asthma biologic drug is ≥ 30 days. The number of participants with prior biologic treatment (switching to tezepelumab) should be targeted at 20% or less.
  • Participation in an observational study that might, in the Investigator's opinion, influence the assessment for the current study, or participation in an interventional clinical trial in the last 3 months.
  • Pregnancy or lactation period.

Treatment and study plan

Primary outcomes

  1. Change in ACQ-5 score from baseline

    Time frame: 1 year

    time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation. Each question of the Asthma Control Questionnaire-5 is ranged on a 7-point scale from 0 (no impairment) to 6 (maximum impairment). The questions are equally weighted and the ACQ score is the mean of the all questions. The total score of ≥1.5 indicates a high probability that asthma is "poorly controlled", 0-0.75 - that asthma is "well controlled", and 0.75-1.5 is a "grey zone".

Secondary outcomes

  1. 1. ACQ-5 score at different points of time

    Time frame: 1 year

    time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation.

    Each question of the Asthma Control Questionnaire-5 is ranged on a 7-point scale from 0 (no impairment) to 6 (maximum impairment). The questions are equally weighted and the ACQ score is the mean of the all questions. The total score of ≥1.5 indicates a high probability that asthma is "poorly controlled", 0-0.75 - that asthma is "well controlled", and 0.75-1.5 is a "grey zone".

  2. 2. Proportion of participants with well-controlled asthma

    Time frame: 1 year

    (ACQ-5 score ≤ 0.75) overall during the study and at different points of time [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]

  3. 3. Proportion of participants with ACQ-5 response

    Time frame: 1 year

    (reduction of ≥ 0.5 in score from baseline) overall during the study and at different points of time [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]

  4. 4. Median time to ACQ-5 response

    Time frame: 1 year

    (reduction of ≥ 0.5 in score from baseline), weeks [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following

  5. 8. Pre- and post-bronchodilator forced expiratory volume in 1 second

    Time frame: 2 years

    (FEV1) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]

  6. 9. Pre- and post-bronchodilator forced vital capacity

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    (FVC) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]

  7. 10. Pre-bronchodilator forced expiratory flow

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    (FEF) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]

  8. 11. Changes on pre- and post-bronchodilator FEV1 from baseline

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation.

    Forced expiratory volume in 1 second (FEV1) response is defined as achievement of either a ≥ 5% or ≥ 100 mL improvement from baseline

  9. 12. Proportion of pre- and post-bronchodilator FEV1 responders

    Time frame: 1 year

    (defined as participants who achieved either a ≥ 5% or ≥ 100 mL improvement from baseline) overall during the study and at different points of time [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation];

  10. 13. FRC

    Time frame: 1 year

    Functional residual capacity (FRC) evaluated by spirometry and/or body plethysmography (if available) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]. Units of measurement: % predicted and L.

  11. 14. Annualised rate of severe asthma exacerbations

    Time frame: 2 years

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  12. 15. Proportion of participants with reduced total number of severe asthma exacerbations at Week 52 following tezepelumab initiation compared with baseline

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]:

    a. Proportion of participants with any reduction in severe exacerbations number;

  13. 16. Change in annualised rate of severe asthma exacerbations from the baseline period to the follow-up period after tezepelumab initiation

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  14. 17. Proportion of participants with 0, 1, 2, ≥3 severe asthma exacerbations

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  15. 18. Cumulative days of severe asthma exacerbations

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    (calculated in participants who had severe asthma exacerbations at baseline) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  16. 19. Proportion of participants with any SCS use

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    ('systemic' means oral, parenteral CS) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  17. 20. Proportion of participants with any reduction (≥ 25%, ≥ 50%, ≥ 75%, and 100% reduction) from baseline on cumulative SCS dose

    Time frame: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    (in prednisone equivalent dose) (to be calculated in participants with SCS use at baseline) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  18. 21. Change in median SCS dose from baseline

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    (to be calculated in participants with SCS use at baseline) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  19. 22. Proportion of participants with long-term (>30 consecutive days) SCS use

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    (to be calculated in participants with SCS use at baseline) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  20. 23. Number (proportion) of participants with asthma-related healthcare resource utilisation

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    (by each type) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  21. 24. Annualised rates of asthma-related hospitalisation, emergency calls (or emergency department visits), and unscheduled out-patient visits to a physician

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation];

  22. 25. Annualised rates of asthma-related scheduled physician visits or healthcare calls for asthma

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  23. 26. Median overall duration (days) of asthma-related hospitalisations

    Time frame: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation].

  24. 27. Mean and median duration (days) of treatment with tezepelumab

    Time frame: Week 52

    to be calculated in all enrolled participants

  25. 28. Median time (days) to tezepelumab discontinuation

    Time frame: Week 52

    to be calculated in participants who discontinued tezepelumab earlier than Week 52 by any reason

  26. 29. Proportion of participants discontinued tezepelumab and switched to other biologic drug for asthma treatment and reason(s)

    Time frame: Week 52

  27. 8.2 Changes on pre- and post-bronchodilator FVC from baseline

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    Forced Vital Capacity (FVC) (L): both pre-bronchodilator and post-bronchodilator should be recorded. time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

  28. 8.3 Changes on pre-bronchodilator FEF from baseline

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    Pre-bronchodilator forced expiratory flow (FEF) 25-75 - the mean speed of flow during forced expiration of from 25% to 75% of the FVC. Measured in L/sec. time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

  29. 12.b Proportion of participants with reduced total number of severe asthma exacerbations at Week 52 following tezepelumab initiation compared with baseline

    Time frame: up to 2 years

    [time points to measure: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]: Proportion of participants with at least 50% reduction in severe exacerbations number;

  30. 12.c Proportion of participants with reduced total number of severe asthma exacerbations at Week 52 following tezepelumab initiation compared with baseline

    Time frame: 2 years

    [time points to measure: baseline during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]: c. Proportion of participants who completed 52 weeks of tezepelumab treatment without any severe asthma exacerbation

  31. 10.2 RLV

    Time frame: 1 year

    Residual lung volume (RLV) evaluated by spirometry and/or body plethysmography (if available) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]. Units of measurement: % predicted and L.

  32. 10.3 TLC

    Time frame: 1 year

    Total lung capacity (TLC) evaluated by spirometry and/or body plethysmography (if available) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation]. Units of measurement: % predicted and L.

  33. 5. SNOT-22 questionnaire score

    Time frame: baseline and at Weeks 4, 12, 24, and 52 following tezepelumab initiation

    • SNOT-22 questionnaire score in patients with comorbid chronic rhinosinusitis with nasal polyps (rhinosinusitis polyposis) at different points of time

  34. 6. Proportion of participants with clinically meaningful improvement

    Time frame: baseline and at Weeks 4, 12, 24, and 52 following tezepelumab initiation

    Proportion of participants with clinically meaningful improvement (reduction in SNOT-22 score by ≥ 8.9) overall during the study and at different points of time

  35. 7. Median time to SNOT-22 response

    Time frame: baseline and at Weeks 4, 12, 24, and 52 following tezepelumab initiation

    Median time to SNOT-22 response (reduction of ≥8.9 in score from baseline), weeks [time points to measure

Other outcomes

  1. 1. Median time from index date to lung function response by FEV1

    Time frame: 1 year

    (FEV1 response is defined as achievement of either a ≥ 5% or ≥ 100 mL improvement from baseline) [time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation]

  2. 2. Proportion of participants with sustained (12 weeks or longer) response by FEV1

    Time frame: 1 year

    [time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation]

  3. 3. Median time from index date to spirometry and/or body plethysmography response

    Time frame: 1 year

    (spirometry and/or body plethysmography response is defined as achievement of a ≥ 5% improvement from baseline) [time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation];

  4. 4. Proportion of participants with sustained (12 weeks or longer) spirometry and/or body plethysmography response

    Time frame: 1 year

    [time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation]

  5. 5. Proportion of participants with medications for asthma treatment by drug class

    Time frame: 2 years

    [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  6. 6. Cumulative dose of ICS by each ICS medication

    Time frame: 2 years

    (ICS may be contained in a single-component product and a combination product, e.g., ICS/LABA) [time points to measure: during 52 weeks before tezepelumab initiation and up to 52 weeks following tezepelumab initiation]

  7. 7. Medication possession ratio (MPR)

    Time frame: Week 52

    total days' supply of a medication in a particular time period, divided by the number of days in the time period

  8. 8. A patient's body weight (kg) measured in participants with elevated BMI at enrolment

    Time frame: 1 year

    (≥25 mg/m2) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation];

  9. 9. Change in body weight from baseline calculated in participants with elevated BMI at enrolment

    Time frame: 1 year

    (≥25 mg/m2) [time points to measure: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation].

  10. 10. Number and proportion of participants who achieved asthma clinical remission at Week 52

    Time frame: Week 52

  11. 1.2 Median duration of lung function response by FEV1 from index date

    Time frame: 1 year

    time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation

  12. 3.2 Median duration of spirometry and/or body plethysmography response from index date (if available)

    Time frame: 1 year

    (spirometry and/or body plethysmography response is defined as achievement of a ≥ 5% improvement from baseline) [time points to measure: baseline and at Weeks 12, 24 and 52 following tezepelumab initiation];

  13. Number and proportion of patients with chronic rhinosinusitis with nasal polyps (CRSwNP)

    Time frame: baseline and at Weeks 4, 12, 24 and 52 following tezepelumab initiation

    Number and proportion of patients with chronic rhinosinusitis with nasal polyps (CRSwNP);

    • Number and proportion of patients with chronic rhinosinusitis without nasal polyps;
    • Number and proportion of patients with CRSwNP with different levels of eosinophils blood count:
    • <150 cells/μl;
    • ≥150 cells/μl;
    • ≥300 cells/μl.

  14. Number and proportion of patients with CRSwNP and presence of biologic therapy prior to tezepelumab initiationor

    Time frame: 1 year

    Number and proportion of patients with CRSwNP and presence of biologic therapy prior to tezepelumab initiationor

Sponsors and collaborators

Lead sponsor

AstraZeneca

Industry

Registry information

Official study title

Multicentre, Single Arm, Non-interventional, Observational, Prospective Study to Assess Demographic Characteristics, Burden of Disease and Short-term Patient Reported Outcomes on Symptom Relief in Severe Asthma Patients Aged Older Than 12 Qualifying for Treatment With Tezepelumab in Russia

Acronym: ELBRUS

Important dates

Study start
2024
Primary completion
2026
Study completion
2026
First posted
Aug 22, 2024
Registry last updated
May 12, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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