Epidemiology of Chronic Bronchitis in Patients With Chronic Obstructive Pulmonary Disease (COPD)

Study Overview
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Brief Summary
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The purpose of this study was to investigate the prevalence of chronic bronchitis in patients suffering from moderate to very severe chronic obstructive pulmonary disease (COPD), and to assess the difference in exacerbation rates in patients suffering from moderate to very severe COPD with chronic bronchitis vs. a population of patients without chronic bronchitis.

Detailed Description
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This was an observational study so participants only took medication that was prescribed by their regular healthcare provider. No additional study medication was administered. This study enrolled patients who were previously diagnosed with moderate to very severe chronic obstructive pulmonary disease (COPD). This study looked at the prevalence of chronic bronchitis in patients suffering from moderate, severe or very severe COPD, and it also compared worsening of COPD in patients with or without chronic bronchitis. This study enrolled 976 patients. This multi-centre trial was conducted in Belgium and Luxembourg. The overall time to participate in this study was at a single, regularly scheduled visit at the pulmonologists office. There were no follow-up assessments for this study.

Official Title
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A Cross-sectional Observational Study in Pulmonology Departments in Belgium and Luxembourg to Investigate the Epidemiology of Chronic Bronchitis in Patients Suffering From Moderate to Very Severe COPD

Conditions
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Chronic Obstructive Pulmonary Disease, Chronic Bronchitis

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 1. Written informed consent. 2. Age ≥ 40 years. 3. Forced expiratory volume in one second (FEV1)/Forced vital capacity (FVC) ratio (post-bronchodilator) <70%. 4. FEV1 (post-bronchodilator) < 80% of predicted. Exclusion Criteria: 1. Moderate and severe exacerbations during the last 4 weeks. 2. Pregnancy. 3. Already participated in the study (allowed to participate only once).

Ages Eligible for Study
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Minimum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Chronic obstructive pulmonary disease<br>Patients with chronic obstructive pulmonary disease will undergo a single visit with the collection of data from his/her records. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants with Chronic Bronchitis | Chronic bronchitis is defined as the presence of cough and sputum production for at least 3 months in each of 2 consecutive years. | 2 years prior to the study visit on Day 1 | 
| Exacerbation Rate | An exacerbation is defined as an event in the natural course of the disease characterised by a change in the patient's baseline dyspnoea, cough, and/or sputum that is beyond normal day-to-day variations, is acute in onset, and may warrant a change in regular medication in a patient with underlying COPD for three or more days. Exacerbation rate is defined as number of exacerbations per year. | 12 Months prior to the study visit | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of Participants with Moderate, Severe or Very Severe COPD | COPD severity will be assessed based on post-bronchodilator forced expiratory volume after 1 second (FEV1) and post-bronchodilator ratio of FEV1 to forced vital capacity (FVC) and then classified by the Global Initiative for Chronic Obstructive Lung Disease (GOLD): Moderate - FEV1/FVC<0.7, FEV1 50-79% normal; Severe - FEV1/FVC<0.70, FEV1 30-49% normal; Very Severe - FEV1/FVC<0.70, FEV1 <30% predicted or FEV1<50% predicted plus chronic respiratory failure. | At the study visit (Day 1) | 
| Percentage of Participants with Risk Factors | Risk factors are defined as smoking status and exposure to environmental risk factors (mineral dusts, organic dusts, fumes and vapours or metallic dusts). | 12 months prior to study visit | 
| Changes in Post-bronchodilator forced expiratory volume after 1 second (FEV1) |  | At the study visit, and 6 months and 12 Months prior to study visit | 
| Percentage of Participants with Other Relevant Diseases | Relevant disease are defined as respiratory diseases (allergy, asthma, chronic respiratory failure), cardiovascular diseases (ischaemic heart disease, heart failure, hypertension), and other diseases (which could be related to COPD) (osteoporosis, skeletal muscle wasting, cachexia, diabetes mellitus, depression, normocytic, anaemia, gastroesophageal reflux disease and lung cancer). | 12 months prior to study visit | 
| COPD Treatment | COPD treatments are defined as inhaled therapies, oral therapies and other therapies administered within the last 12 months as influenza vaccination and smoking cessation therapy. | At the study visit (Day 1) | 
| Changes in post-bronchodilator ratio of FEV1 to forced vital capacity (FVC) |  | At the study visit, and 6 months and 12 Months prior to study visit | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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COPD