CompletedNot Applicable

ATP Level and Cough Sensitivity to ATP in Subjects With Refractory/Unexplained Chronic Cough

China131 participantsStarted 2022-05-16

Plain-language summary

This is a cross-sectional study to investigate ATP level in induced sputum and cough sensitivity to ATP in subjects with refractory/unexplained chronic cough. 60 patients with refractory/unexplained chronic cough and 30 matched healthy controls were recruited. Demographic data, clinical characteristic, cough sacles and medical history records were collected. Cough chanllage(ATP and capsaicin) and ATP measurement in sputum were conducted.The difference of sputum ATP level between patients and control and the correlation between sputum ATP level and cough sensitivity to ATP were analyzed.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. ≥18 years old
. cough as sole symptom lasting ≥6 months
. cough visual analogue score ≥30mm
. diagnosed as RCC/UCC according to guidelines

Exclusion criteria

. smoking currently or in the past 6 months, or a smoking history of \>20 pack-year
. a forced expiratory volume in 1 second/forced vital capacity ratio \<70%;
. use of inhaled/oral corticosteroid, bronchodilators, anti-allergic medicine, antitussive medicine or anti-reflux treatment in the past 1 week;

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

ATP Level in Sputum Supernatant

Timeframe: ATP concentrations were measured in all specimens on the day of the last participant's enrollment.

Trial details

NCT IDNCT05265871

SponsorKefang Lai

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2024-01-24

Results submitted2025-04-03

View on ClinicalTrials.gov More Refractory/Unexplained Chronic Cough trials