Ignite Creation Date:
2025-12-25 @ 1:27 AM
Ignite Modification Date:
2025-12-25 @ 11:39 PM
Study NCT ID:
NCT01785394
Status:
UNKNOWN
Last Update Posted:
2013-02-07
First Post:
2013-02-01
Is NOT Gene Therapy:
False
Has Adverse Events:
False
Brief Title:
POLlinosis and Exhaled Breath Temperature
Sponsor:
Prof. Todor Popov
Organization:
Study Overview
Official Title:
Changes in Exhaled Breath Temperature During the Pollen Season in Subjects With Allergic Rhinoconjunctivitis Sensitized to Grasses and Effect of Sublingual Immunotherapy
Status:
UNKNOWN
Status Verified Date:
2013-02
Last Known Status:
ACTIVE_NOT_RECRUITING
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
POLET
Brief Summary:
The purpose of this study is to determine whether exhaled breath temperature, a surrogate marker of airway inflammation, rises during the pollen season in sensitized subjects with allergic rhinoconjucnctivitis with or without mild asthma. Sublingual Immunotherapy with respective allergens suppresses the seasonal increase of EBT. During the second year (2013) of the trial all patients will be treated with 5 grass allergen extract: carry over differences between the active and placebo arms from the previous year (2012) will be looked for.
Detailed Description:
Patients with grass pollen allergy are most typical and best responding to sublingual immunotherapy. Their selection will be done in accordance with the criteria listed in Chapter 9 of the World Allergy Organization Position Paper on specific immunotherapy 2009 and in compliance with the rules for good clinical practice.
Proposed primary variable: the difference between the changes of exhaled breath temperature before and in the pollen season of subjects treated with grass-pollen sublingual immunotherapy and the untreated control patients.
Suggested secondary variables: changes over time of exhaled breath temperature in the two groups, difference in symptoms scores, methacholine responsiveness, rescue medication usage.
Statistical analysis: On the basis of the available data about the variability of exhaled breath changes and its changes upon flare up of airway inflammation or after anti-inflammatory treatment we have calculated a sample size of 20 subjects in each group to be sufficient to prove differences in the primary variable with a significance level \<0.05. However, as this is "first time ever" type of pilot study on sublingual immunotherapy and exhaled breath temperature in grass-pollen patients, this estimate is relative. By all means this study will identify trends to be used for sample size calculations in future studies. During the second year of the study when all patients will be on active treatment with 5 grass allergen extract, carry over effects from the first year of treatment with 5 grass allergen extract or placebo on exhaled breath temperature will be explored.
Proposed primary variable: the difference between the changes of exhaled breath temperature before and in the pollen season of subjects treated with grass-pollen sublingual immunotherapy and the untreated control patients.
Suggested secondary variables: changes over time of exhaled breath temperature in the two groups, difference in symptoms scores, methacholine responsiveness, rescue medication usage.
Statistical analysis: On the basis of the available data about the variability of exhaled breath changes and its changes upon flare up of airway inflammation or after anti-inflammatory treatment we have calculated a sample size of 20 subjects in each group to be sufficient to prove differences in the primary variable with a significance level \<0.05. However, as this is "first time ever" type of pilot study on sublingual immunotherapy and exhaled breath temperature in grass-pollen patients, this estimate is relative. By all means this study will identify trends to be used for sample size calculations in future studies. During the second year of the study when all patients will be on active treatment with 5 grass allergen extract, carry over effects from the first year of treatment with 5 grass allergen extract or placebo on exhaled breath temperature will be explored.
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: