- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05426538
Craving to Biologics Used in Severe Asthma (CROCUS)
Study Overview
Status
Conditions
Detailed Description
Recent research by Kroes and colleagues on omalizumab levels has shown that approximately half of patients on long-term omalizumab therapy (>4 months) experience a subjective craving for the next dose. These patients had a need (Borg scale 3-10) for the next dose of biologic before the usual periodic dose, while other patients indicated that they had no or a low need (Borg scale 0-2) for the next dose at the usual dosing moment. This so-called 'craving' has not been described in the literature before. Patients in the high-requirement group had significantly lower median omalizumab trough levels than patients in the low-requirement group. There may be a relationship between blood levels of biologics and the need for the next dose. However, data is currently only available on the variability in serum trough levels of omalizumab, but not yet on the other biologics for asthma, some of which are administered as a fixed dose and some are dosed by body weight. No assays are currently available for blood level determinations from the other biologics.
Before investigating the relationship between blood levels and the need for biologics, it is important to fully map the 'craving'. Some patients who are responders to biologic therapy based on improvements in clinical outcomes still do not have good enough control of their asthma and indicate that the dosing interval is not optimal. In addition to patients that indicate a need for the next dose, there are also patients that would like a longer dosing interval. To date, dosing interval adjustments have been made based on the patient's subjective experience and the physician's clinical judgment. This study investigates how big the problem of need for the next dose is, how patients experience this need, what this need exactly entails, whether this occurs more often in patients treated for a longer period and what possible problems patients experience in the treatment with biologics against serious problems.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Friesland
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Leeuwarden, Friesland, Netherlands, 8934AD
- Medical Centre Leeuwarden
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
The study population concerns patients in the Medical Center Leeuwarden (MCL) with severe asthma who are treated with a biologic (omalizumab, mepolizumab, reslizumab, benralizumab or dupilumab) for more than 4 months.
A treatment duration longer than 4 months has been chosen, so that only responders to the biologics are included in the study and the therapy has its effect.
About 20 patients are interviewed. Subsequently, the questionnaire will be presented to approximately 30 patients per biologic, a total of approximately 150 patients.
Description
Inclusion Criteria:
- Treated with a biologic for severe asthma in the Medical Centre Leeuwarden for more than 4 months
Exclusion Criteria:
- Not speaking Dutch
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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Interview group
A selection of patients will be interviewed, mapping the craving for the next biologic administration.
These interviews will be used to develop a questionnaire to quantify the craving for the next administration in the total population.
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Questionnaire group
The remaining patients will be asked to fill in a questionnaire, based on the interviews from Group 1.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The prevalence of craving to the next biologic administration.
Time Frame: 6 months
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Craving will be assessed as a BORG-scale score >2.
This scale ranges from 0 (No craving at all) to 10 (Extreme craving).
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6 months
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The character of craving to the next biologic administration.
Time Frame: 6 months
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This will be assessed by scoring the prevalence of asthma-related symptoms in patients reporting a craving.
Craving will be assessed as a BORG-scale score >2.
This scale ranges from 0 (No craving at all) to 10 (Extreme craving).
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6 months
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Differences in craving (BORG-scale 0-10) between patients treated for more or less than 1 year.
Time Frame: 6 months
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Craving will be assessed with a BORG-scale score.
This scale ranges from 0 (No craving at all) to 10 (Extreme craving).
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6 months
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Differences in craving (BORG-scale 0-10) between patients with different biologics.
Time Frame: 6 months
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Craving will be assessed with a BORG-scale score.
This scale ranges from 0 (No craving at all) to 10 (Extreme craving).
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6 months
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Any other issues regarding the craving/administration of biologics for severe asthma, based on patient-level input from interviews.
Time Frame: 6 months
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6 months
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- CROCUS
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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