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

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Total Enrollment

1100 participants

Study Classification

OBSERVATIONAL

Study Start Date

2023-05-19

Study Completion Date

2025-06-30

Brief Summary

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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.

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Detailed Description

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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.

Conditions

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Asthma

Study Design

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Observational Model Type

OTHER

Study Time Perspective

OTHER

Study Groups

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Positive group

The group that conducted the Methacholine Choline Provocation Test with Positive result

Methacholine Choline Provocation Test

Intervention Type DIAGNOSTIC_TEST

Perform methacholine choline provocation test according to the protocol

Negative group

The group that conducted the Methacholine Choline Provocation Test with negative result

Methacholine Choline Provocation Test

Intervention Type DIAGNOSTIC_TEST

Perform methacholine choline provocation test according to the protocol

Interventions

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Methacholine Choline Provocation Test

Perform methacholine choline provocation test according to the protocol

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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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.)

Minimum Eligible Age

5 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Responsible Party

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jingping Zheng

Chief Physician

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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yi Gao, PhD

Role: PRINCIPAL_INVESTIGATOR

The First Hospital of Guangzhou Medical University

Locations

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