Asthma Clinical Research Network (ACRN) Trial - Best Adjustment Strategy for Asthma in Long Term (BASALT)

Asthma Clinical Trial

— BASALT  

Official title:

Asthma Clinical Research Network (ACRN) Trial - Best Adjustment Strategy for Asthma in Long Term (BASALT)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00495157
• Other study ID #: 494
• Secondary ID: 5U10HL074231U10H
• Status: Completed
• Phase: Phase 3
• First received: June 28, 2007
• Last updated: April 5, 2013
• Start date: June 2007
• Est. completion date: July 2010

Study information

• Verified date: April 2013
• Source: Milton S. Hershey Medical Center
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Federal Government
• Study type: Interventional

Clinical Trial Summary

Asthma can be effectively controlled using inhaled corticosteroid medication. Treatment with inhaled corticosteroids often requires periodic adjustments to medication dosing and frequency levels. This study examines whether it is more beneficial to adjust corticosteroid treatment based on asthma symptoms and/or biomarkers of lung function versus standard medical guidelines.

Description:

Asthma is a common, long-term disease that is caused by inflammation of the airways. Symptoms of asthma may include wheezing, coughing, shortness of breath, and chest tightness. The most common treatment for asthma is the use of inhaled corticosteroid medications with periodic adjustments to treatment intensity. For example, corticosteroid dosage is increased when asthma symptoms worsen and decreased when symptoms improve. However, guidelines for making these adjustments, especially reduced intensity adjustments, have not been well established. In people who are initially well controlled on daily low-dose inhaled corticosteroid therapy, symptom-based adjustment (SBA) and/or biomarker-based adjustment (BBA) of inhaled corticosteroid therapy may be more beneficial at maintaining asthma control than standard, guideline-based adjustments (GBA). The purpose of this study is to determine if adjusting treatment based on symptoms and/or lung function biomarkers is more effective at controlling asthma than adjusting corticosteroid use based on standardized medical guidelines.

This study begins with a 4-week period during which participants are monitored while they use an inhaler containing a low dose of inhaled corticosteroid medication. Participants then are assigned to take part in either the BASALT study or the Tiotropium as an Alternative to Long-Acting Beta-Agonists and Corticosteroids (TALC) study, which is a separate Asthma Clinical Research Network (ACRN) study. Participants in BASALT undergo 2 to 4 weeks of adherence testing, which involves using three inhalers that have electronic monitoring devices attached to them. Participants also are asked to measure and record their breathing rates and lung function in a study diary.

BASALT participants are then randomly assigned to one of three treatment groups: SBA, BBA, or GBA. Each participant is given four inhalers: one inhaler contains albuterol, which is used on an as-needed basis as rescue medication; one inhaler contains corticosteroid medication; and two inhalers contain placebo. One of the latter three inhalers is used each time the albuterol inhaler is used, and the other two inhalers are used on a daily basis. Study visits occur at Weeks 2, 4, 6, 12, 18, 24, 30, and 36 of the treatment period. Inhalers are adjusted during these visits based on SBA, BBA, or GBA guidelines. At selected visits, the following procedures occur: physical exam; blood collection; allergy skin testing; heart rate monitoring; lung function and airway testing; methacholine challenge test to determine asthma severity; and questionnaires to assess asthma control, quality of life, and other healthcare factors. Participants record asthma symptoms, peak flow measurements, and medication usage in a daily diary.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 342
• Est. completion date: July 2010
• Est. primary completion date: July 2010
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria for BASALT and TALC Studies:

• Clinical history consistent with asthma

• Forced expiratory volume in one second (FEV1) greater than 40% of predicted value

• Asthma confirmed by one of the following two criteria:

1. Beta-agonist reversibility to 4 puffs albuterol of at least 12% OR

2. Methacholine provocative concentration at 20% (PC20) FEV1 of 8 milligrams per millimeter (mg/mL) or less when not on an inhaled corticosteroid, or 16 mg/mL or less when on an inhaled corticosteroid

• Need for daily controller therapy (i.e., inhaled corticosteroids, leukotriene modifiers, and/or long-acting beta-agonists) based on one or more of the following criteria:

1. Received prescription for or used asthma controller within the 12 months prior to study entry OR

2. Experienced symptoms for more than twice a week and not on asthma controller

• If on inhaled steroids (any drug at any dose not exceeding the equivalent of 1000 micrograms (mcg) of fluticasone daily), participant must have been on a stable dose for at least 2 weeks prior to study entry

• Non-smoker (i.e., total lifetime smoking history less than 10 pack-years; no smoking for at least 1 year prior to study entry)

• Willing to use an effective form of birth control throughout the study

Inclusion Criteria for BASALT Study:

• Ability to measure peak expiratory flow (PEF) each morning using the electronic peak flow meter (EPFM) device and to accurately transcribe the PEF measurements onto the diary cards at least 75% of the time during the last 2 weeks of the adherence testing period

• 75% compliance with recording peak flow measurements and symptoms in a symptom diary during the last 2 weeks of the adherence testing period

• Ability to take Inhalers A, B, and C at least 75% of scheduled doses; 75% compliance per inhaler is required

• No treatment failure (includes significant asthma exacerbation) within the last 4 weeks

Exclusion Criteria for BASALT and TALC Studies:

• Lung disease other than asthma, including chronic obstructive pulmonary disease (COPD) and chronic bronchitis

• Established or suspected diagnosis of vocal cord dysfunction

• Significant medical illness other than asthma

• History of respiratory tract infection within the 4 weeks prior to study entry

• History of a significant exacerbation of asthma within the 4 weeks prior to study entry

• History of life-threatening asthma requiring treatment with intubation and mechanical ventilation in the 5 years prior to study entry

• Hyposensitization therapy other than an established maintenance regimen

• Inability to coordinate use of the delivery devices used in the study, based on the opinion of the investigator or clinical coordinator

• Pregnant

Exclusion Criteria for BASALT Study:

• Inability to coordinate use of the medication delivery devices used in the study, based on the opinion of the investigator or clinical coordinator

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Asthma

Intervention

Behavioral:
• Symptom-based adjustment
Symptom-based adjustment of beclomethasone dipropionate administered via a hydrofluoroalkane (HFA) inhaler (QVAR® 40 mcg or QVAR® 80 mcg)
• Biomarker-based adjustment
Biomarker-based adjustment of beclomethasone dipropionate administered via a hydrofluoroalkane (HFA) inhaler (QVAR® 40 mcg or QVAR® 80 mcg)
• Guideline-based adjustment
Guideline-based adjustment of beclomethasone dipropionate administered via a hydrofluoroalkane (HFA) inhaler (QVAR® 40 mcg or QVAR® 80 mcg)

Locations

Country	Name	City	State
United States	Brigham & Women's Hospital	Boston	Massachusetts
United States	National Jewish Medical and Research Center	Denver	Colorado
United States	Duke University Medical Center	Durham	North Carolina
United States	University of Texas Medical Branch	Galveston	Texas
United States	University of Wisconsin, Madison	Madison	Wisconsin
United States	Columbia University Medical Center	New York	New York
United States	University of California, San Diego	San Diego	California
United States	University of California, San Francisco	San Francisco	California
United States	Washington University, St. Louis	St. Louis	Missouri
United States	Wake Forest University Health Sciences	Winston-Salem	North Carolina

Sponsors (2)

Lead Sponsor	Collaborator
Milton S. Hershey Medical Center	National Heart, Lung, and Blood Institute (NHLBI)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Time to Treatment Failure (Measured in Days)		Measured during the 36-week treatment period	No
Secondary	Number of Episodes of Treatment Failure		Measured during the 36-week treatment period	No
Secondary	Time to First Asthma Exacerbation		Measured during the 36-week treatment period	No
Secondary	Number of Asthma Exacerbations		Measured during the 36-week treatment period	No
Secondary	Tests of Airway Caliber and Responsiveness (Forced Expiratory Volume in One Second (FEV1) Pre- and Post-bronchodilator Inhalation), Methacholine Provocative Concentration at 20% (PC20)		Measured during the 36-week treatment period	No
Secondary	Tests of Airway Inflammation (Exhaled Breath Condensate (EBC), Fractional Exhaled Nitric Oxide (FeNO), Sputum Eosinophils)		Measured during the 36-week treatment period	No
Secondary	Quality-of-life (AQLQ), Asthma Control Questionnaire (ACQ), and Number of Visit Days That ACQ is Less Than 1.25		Measured during the 36-week treatment period	No
Secondary	Total Amount of Oral Prednisone Required and Total Amount of Inhaled Steroids		Measured during the 36-week treatment period	No
Secondary	Adverse Events		Measured during the 36-week treatment period	Yes

External Links

•   Click here for the Asthma Clinical Research Network Web site