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Clinical trial

Cough Suppressive Therapy in Patients With Chronic Cough

Read time: 1 mins
Last updated:7th Nov 2022
Status: Recruiting
Identifier: NCT05522699
Cough Suppressive Therapy in Patients With Chronic Cough

Brief Summary:
In this randomized, placebo-controlled, interventional study on chronic cough a non-pharmacological cough suppressive therapy is the intervention to be studied, with a control group receiving treatment consisting of general healthy lifestyle advice. The following data will be collected before, after and up to six months after treatment: Standardized questionnaires for diagnosis of background factors, Leicester Cough Questionnaire (LCQ), Work Ability Index (WAI), and cough frequency as well as lung function and biomarkers.

The primary treatment effect measurement will be changes in chronic cough-related quality of life, measured by the Leicester Cough Questionnaire (LCQ).

Detailed Description:
The study will be carried out in collaboration between respiratory physicians, clinical physiologists, physiotherapists, speech- and language therapists and gastroenterologists.
The primary hypothesis of the planned study is:
The cough suppressive therapy improves chronic cough-related quality of life and work ability, and is sustained over six months after treatment.

The secondary hypotheses of the planned study are:
Treatment of chronic cough by the cough suppressive therapy can reduce cough frequency (measured by an automated cough detector), airway inflammation and airway resistance.

Baseline differences in clinical findings, biomarkers and physiologic measurements predict different treatment effects.

The following data will be collected before and after treatment:
- Standardized questionnaires for diagnosis of background factors and cough duration, LCQ, WAI, questions on sick leave days, voice disturbance questionnaire.
- Physiological measurements: Spirometry with reversibility test, impulse oscillometry before and after provocation with hypertonic saline inhalation. 24 hours cough frequency analysis, voice analysis.
- Biomarkers: Fractional exhaled nitric oxide (FeNO), blood-eosinophils and eosinophil cationic protein in serum, proteomics in particles in exhaled air (PExA)

Study Type: Interventional (Clinical Trial)
Estimated Enrollment : 100 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Cough Suppressive Therapy in Chronic Cough: Randomized Controlled Trial
Estimated Study Start Date: November 3, 2022
Estimated Primary Completion Date: August 31, 2024
Estimated Study Completion Date: December 31, 2024

- Experimental: Cough suppressive therapy
- Active Comparator: Healthy lifestyle instructions

Category Value
Study type(s) Interventional
Estimated enrolment 100
Estimated Study start date 03 November 2022
Estimated Study Completion Date 31 December 2024

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