The study hypothesis is that symptomatic current and former smokers with spirometric values within the normal range (post-bronchodilator FEV1/FVC≥0.70 and post-BD FVC ≥ 70% predicted will still derive symptomatic benefit from long-acting bronchodilator therapy even though they are excluded from current GOLD guideline recommendations.
RETHINC is a 12-week multicenter, randomized, double-blind, placebo-controlled, parallel-group study to assess the efficacy and safety of indacaterol/glycopyrrolate 27.5/15.6 mcg inhaled twice daily in symptomatic current and former smokers with respiratory symptoms despite preserved spirometry as defined by CAT ≥ 10 and post-bronchodilator FEV1/FVC ratio ≥0.70, respectively.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
780
27.5/15.6 mcg active indacaterol/glycopyrrolate
27.5/15.6 mcg placebo
Universityof Alabama
Birmingham, Alabama, United States
University of California
Los Angeles, California, United States
Proportion (Percentage) of Individuals Who Experience a 4 Unit Improvement in St. George's Respiratory Questionnaire (SGRQ) at 12 Weeks and do Not Meet Criteria for Treatment Failure During the 12 Week Treatment Period
Measured by units of improvement in SGRQ scores at Baseline and 12 weeks, as well as review of treatment failure status at 4 weeks and 12 weeks of treatment (treatment failure is defined by an increase in lower respiratory symptoms necessitating treatment with active, long-acting inhaled bronchodilator, corticosteroids or antibiotics). A 4 unit change is the minimum clinically important difference. SGRQ has a 0 - 100 score; 0 as low symptoms (feeling better) and 100 as high symptoms (feeling worse).
Time frame: Baseline and 12 weeks
Proportion of Individuals With a 2 Unit Improvement in CAT Without Treatment Failure
Proportion of individuals with a 2 unit improvement in CAT without treatment failure
Time frame: 12 weeks
Proportion of Individuals With a 1 Unit Improvement in the BDI/TDI Without Treatment Failure
Proportion of individuals with a 1 unit improvement in the BDI/TDI without treatment failure
Time frame: 12 weeks
Proportion of Individuals With Both a 4 Unit Improvement in SGRQ and a 1 Unit Improvement in BDI/TDI Without Treatment Failure
Measured by units of improvement in SGRQ scores at Baseline and 12 weeks, as well as review of treatment failure status at 4 weeks and 12 weeks of treatment (treatment failure is defined by an increase in lower respiratory symptoms necessitating treatment with active, long-acting inhaled bronchodilator, corticosteroids or antibiotics).
Time frame: 12 weeks
Mean Change in St. George's Respiratory Questionnaire (SGRQ)
Value at 12 Weeks Minus Baseline. SGRQ has a 0 - 100 score; 0 as low symptoms (feeling better) and 100 as high symptoms (feeling worse).
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University of California
San Francisco, California, United States
LABIOMED at Harbor-UCLA Medical Center
Torrance, California, United States
University of Illinois
Chicago, Illinois, United States
Northwestern University
Chicago, Illinois, United States
University of Iowa
Iowa City, Iowa, United States
Johns Hopkins University
Baltimore, Maryland, United States
University of Michigan
Ann Arbor, Michigan, United States
Minneapolis VA Medical Center
Minneapolis, Minnesota, United States
...and 6 more locations
Time frame: Baseline, 12 weeks
Mean Change in COPD Assessment Test (CAT)
Value at 12 Weeks Minus Baseline. 0 - 40; 0 as low symptoms (feeling better) and 40 as high symptoms (feeling worse).
Time frame: Baseline, 12 weeks
Mean Change in Baseline Dyspnea Index (BDI)/Transition Dyspnea Index (TDI)
Value at 12 Weeks Minus Baseline.
Time frame: 12 Weeks
Area Under the Curve (AUC) 0-3 Hours for FEV1
FEV1 AUC0-3h was calculated as the area under the FEV1-time curve from 0 to 3h post-dose using the trapezoidal rule, divided by the duration (3h) to report in liters.
Time frame: At 12 weeks, FEV1 is measured at 1-hour intervals for 3 hours
Change From Baseline in Trough Forced Expiratory Volume Per 1 Second (FEV1) - Absolute Value
Trough FEV1 at 12 week minus trough FEV1 at baseline.
Time frame: Baseline to 12 Weeks
Change From Baseline in 12 Hour Trough Inspiratory Capacity - Absolute Value
Change from baseline in 12 hour trough inspiratory capacity - absolute value
Time frame: Baseline
Symptoms and Rescue Medication Use Based on Daily Diary
Percentage of days with symptoms (shortness of breath, chest tightness, wheezing, cough, or sputum) or use of albuterol
Time frame: During study follow-up (Baseline to 12 weeks)
Treatment Failure Defined by Increase in Lower Respiratory Symptoms Necessitating Treatment With Active, Long-acting Inhaled Bronchodilator, Corticosteroids or Antibiotics
Treatment failure defined by increase in lower respiratory symptoms necessitating treatment with active, long-acting inhaled bronchodilator, corticosteroids or antibiotics
Time frame: During study follow-up (baseline to 12 Weeks)
Change From Baseline in Trough FEV1 - % Predicted
Trough FEV1 at 12 week minus trough FEV1 at baseline.
Time frame: Baseline to 12 Weeks
Change in FEF25-75%
FEF25-75%-Forced expiratory flow over the middle one half of the FVC; the average flow from the point at which 25 percent of the FVC has been exhaled to the point at which 75 percent of the FVC has been exhaled.
Time frame: Baseline to 12 weeks