NCT06199830View on ClinicalTrials.gov

A Case-control Study on the Differentiation Between Cough Variant Asthma and Chronic Cough

CompletedOBSERVATIONAL
Enrollment

645

Participants

Timeline

Start Date

March 1, 2022

Primary Completion Date

May 20, 2023

Study Completion Date

August 31, 2023

Conditions
Asthma
Interventions
DIAGNOSTIC_TEST

positive bronchial provocation test

Patients were asked to inhale gradually increasing doses of methacholine (0.9% saline, 0.078, 0.312, 1.125 and 2.504 mg), and FEV1 was measured after each inhalation. This test was stopped until a reducing in baseline FEV1 of 20%.

Trial Locations (1)

Unknown

The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou

All Listed Sponsors
lead

The First Affiliated Hospital of Zhejiang Chinese Medical University

OTHER