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