A Study on the Diagnostic Value of the Methacholine Choline Provocation Test in the Asthmatic Population

jingping Zheng1,100 enrolled

Overview

This study was a multicenter, open, observational study and was divided into two stages; Stage I study includes patients with suspected asthma to observe the diagnostic value and safety of Methacholine Choline Provocation Test. All patients clinically evaluated for bronchial provocation testing were included in the stage II study to further validate the diagnostic value and cutoff value of the methacholine choline provocation test.

This study was a multicenter, open, observational study. The study was divided into two stages; the first stage of the study included a population with suspected asthma and performed a bronchial provocation test, and cumulative provocation dose when forced expiratory volume in one second (FEV1) fell by 20% (PD20 ) data were recorded. Subjects with positive excitation were treated as asthma for 3 months and treatment was considered effective to confirm the diagnosis of asthma. Sensitivity, specificity, and reliability of the methacholine choline provocation test were calculated, and cutoff values were obtained by exploratory analysis based on PD20 values. All patients clinically evaluated for bronchial provocation testing were included in the stage II study to further validate the diagnostic value and cutoff value of the methacholine choline provocation test.

Study Type

OBSERVATIONAL

Enrollment

1,100

Conditions

Asthma

Interventions

Methacholine Choline Provocation TestDIAGNOSTIC_TEST

Perform methacholine choline provocation test according to the protocol

Eligibility

Sex: ALLMin age: 5 Years

Medical Language ↔ Plain English

Inclusion Criteria: Stage I study: * clinically evaluated as suspected asthma but have not been previously diagnosed as asthma and require a bronchial provocation test * Basal lung function FEV1 ≥ 60% * Meet the requirements for conducting bronchial excitation tests and pulmonary ventilation examinations * Not currently suffering from or accompanied by other respiratory diseases, including allergic rhinitis, chronic obstructive pulmonary disease, chronic bronchitis, etc. Stage II study: * Basal lung function FEV1 ≥ 60% * Meet the requirements for conducting bronchial excitation tests and pulmonary ventilation examinations Exclusion Criteria: * Have had a fatal asthma attack, or have required mechanical ventilation for an asthma attack within the last 3 months * Definite hypersensitivity reaction to inhaled stimulants or salbutamol or unexplained urticaria * Severe impairment of basal pulmonary ventilation (FEV1 \< 60% of expected value %, or \< 1 L in adults) * Poor cooperation with basal pulmonary function tests that do not meet quality control requirements * Other conditions that make a bronchial provocation test or pulmonary ventilation function test inappropriate (e.g., recent presence of severe cardiovascular disease, seizures, uncontrolled hypertension, etc.)

Locations (6)

Beijing Chao-yang Hospital, Capital Medical University

Beijing, Beijing Municipality, China

NOT_YET_RECRUITING

Songshan General Hospital

Chongqing, Chongqing Municipality, China

NOT_YET_RECRUITING

The First Hospital of Guangzhou Medical University

Guangzhou, Guangdong, China

Outcomes

Primary Outcomes

Sensitivity, specificity

The sensitivity, specificity of the test were calculated by the results of the test and whether the patient was finally diagnosed with asthma by performing the methacholine choline provocation test in patients suspected of having asthma

Time frame: Baseline up to 3 months

Secondary Outcomes

The incidence, severity of adverse events

Safety

Time frame: Baseline up to 1 week

Central Contacts

jingping Zheng

CONTACT

18928868238 jpzhenggy@163.com

yi Gao

CONTACT

13560358322

Data from ClinicalTrials.gov

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