Four (4) double-blind, parallel-group clinical trials were conducted with Advair HFA in 1,517 adult and adolescent patients (aged ≥12 years, mean baseline FEV1 65% to 75% of predicted normal) with asthma that was not optimally controlled on their current therapy. All metered-dose inhaler treatments were inhalation aerosols given as 2 inhalations twice daily, and other maintenance therapies were discontinued.
Trial 1: Clinical Trial with Advair HFA 45 mcg/21 mcg
- A placebo-controlled, 12-week, US trial compared Advair HFA 45 mcg/21 mcg with fluticasone propionate CFC inhalation aerosol 44 mcg or salmeterol CFC inhalation aerosol 21 mcg, each given as 2 inhalations twice daily.
- The primary efficacy endpoints were predose FEV1 and withdrawals due to worsening asthma.
- This trial was stratified according to baseline asthma therapy: patients using beta-agonists (albuterol alone or salmeterol) or ICS.
- Baseline FEV1 measurements were similar across treatments: Advair HFA 45 mcg/21 mcg, 2.29 L; fluticasone propionate 44 mcg, 2.20 L; salmeterol, 2.33 L; and placebo, 2.27 L.
- Predefined withdrawal criteria for lack of efficacy, an indicator of worsening asthma, were utilized for this placebo-controlled trial.
Results showed statistically significantly fewer patients who received Advair HFA 45 mcg/21 mcg were withdrawn due to worsening asthma (2%) compared with salmeterol (25%) and placebo (28%). Fewer patients who received Advair HFA 45 mcg/21 mcg were withdrawn due to worsening asthma (2%) compared with fluticasone propionate 44 mcg (8%); however, the difference was not statistically significant.
The FEV1 results at endpoint showed that patients who received Advair HFA 45 mcg/21 mcg had significantly greater improvements in FEV1 (0.58 L, 27%) compared with fluticasone propionate 44 mcg (0.36 L, 18%), salmeterol (0.25 L, 12%), and placebo (0.14 L, 5%). These improvements in FEV1 with Advair HFA 45 mcg/21 mcg were achieved regardless of baseline asthma therapy (albuterol alone, salmeterol, or ICS).
The subjective impact of asthma on patients’ perception of health was evaluated through use of an instrument called the Asthma Quality of Life Questionnaire (AQLQ) (based on a 7-point scale where 1 = maximum impairment and 7 = none). Patients receiving Advair HFA 45 mcg/21 mcg had clinically meaningful improvements in overall asthma-specific quality of life as defined by a difference between groups of ≥0.5 points in change from baseline AQLQ scores (difference in AQLQ score of 1.14 [95% CI, 0.85-1.44] vs placebo).
Trial 2: Clinical Trial with Advair HFA 45 mcg/21 mcg
- An active-controlled, 12-week, US trial compared Advair HFA 45 mcg/21 mcg with fluticasone propionate CFC inhalation aerosol 44 mcg and salmeterol CFC inhalation aerosol 21 mcg, each given as 2 inhalations twice daily, in 283 patients using as-needed albuterol alone.
- The primary efficacy endpoint was predose FEV1. Baseline FEV1 measurements were similar across treatments: Advair HFA 45 mcg/21 mcg, 2.37 L; fluticasone propionate 44 mcg, 2.31 L; and salmeterol, 2.34 L.
Efficacy results in this trial were similar to those observed in Trial 1. Patients who received Advair HFA 45 mcg/21 mcg had significantly greater improvements in FEV1 (0.69 L, 33%) compared with fluticasone propionate 44 mcg (0.51 L, 25%) and salmeterol (0.47 L, 22%).
Trial 3: Clinical Trial with Advair HFA 115 mcg/21 mcg
- A placebo-controlled, 12-week, US trial compared Advair HFA 115 mcg/21 mcg with fluticasone propionate CFC inhalation aerosol 110 mcg or salmeterol CFC inhalation aerosol 21 mcg, each given as 2 inhalations twice daily, in 365 patients using ICS.
- The primary efficacy endpoints were predose FEV1 and withdrawals due to worsening asthma. Baseline FEV1 measurements were similar across treatments: Advair HFA 115 mcg/21 mcg, 2.23 L; fluticasone propionate 110 mcg, 2.18 L; salmeterol, 2.22 L; and placebo, 2.17 L.
Efficacy results in this trial were similar to those observed in Trials 1 and 2. Patients who received Advair HFA 115 mcg/21 mcg had significantly greater improvements in FEV1 (0.41 L, 20%) compared with fluticasone propionate 110 mcg (0.19 L, 9%), salmeterol (0.15 L, 8%), and placebo (-0.12 L, -6%). Significantly fewer patients who received Advair HFA 115 mcg/21 mcg were withdrawn from this trial for worsening asthma (7%) compared with salmeterol (24%) and placebo (54%). Fewer patients who received Advair HFA 115 mcg/21 mcg were withdrawn due to worsening asthma (7%) compared with fluticasone propionate 110 mcg (11%); however, the difference was not statistically significant.
Trial 4: Clinical Trial with Advair HFA 230 mcg/21 mcg
- A active-controlled, 12-week, non-US trial compared Advair HFA 230 mcg/21 mcg with fluticasone propionate CFC inhalation aerosol 220 mcg, each given as 2 inhalations twice daily, and with Advair Diskus 500 mcg /50 mcg given as 1 inhalation twice daily in 509 patients using ICS.
- The primary efficacy endpoint was morning peak expiratory flow (PEF). Baseline morning PEF measurements were similar across treatments: Advair HFA 230 mcg/21 mcg, 327 L/min; Advair Diskus 500 mcg/50 mcg, 341 L/min; and fluticasone propionate 220 mcg, 345 L/min.
Results showed that the morning PEF improved significantly with Advair HFA 230 mcg/21 mcg compared with fluticasone propionate 220 mcg over the 12-week treatment period. Improvements in morning PEF observed with Advair HFA 230 mcg/21 mcg were similar to improvements observed with Advair Diskus 500 mcg/50 mcg.
One-Year Safety Trial: Clinical Trial with Advair HFA 45 mcg/21 mcg, 115 mcg/21 mcg, and 230 mcg/21 mcg
- A 1-year, open-label, non-U.S. trial evaluated the safety of Advair HFA 45 mcg/21 mcg, 115 mcg/21 mcg, and 230 mcg/21 mcg given as 2 inhalations twice daily in 325 patients.
- This trial was stratified into 3 groups according to baseline asthma therapy: patients using short-acting beta2-agonists alone (n = 42), salmeterol (n = 91), or ICS (n = 277).
- Patients treated with short-acting beta2-agonists alone, salmeterol, or low doses of ICS with or without concurrent salmeterol received Advair HFA 45 mcg/21 mcg.
- Patients treated with moderate doses of ICS with or without concurrent salmeterol received Advair HFA 115 mcg/21 mcg.
- Patients treated with high doses of ICS with or without concurrent salmeterol received Advair HFA 230 mcg/21 mcg.
- Baseline FEV1 measurements ranged from 2.3 to 2.6 L.
At study endpoint, improvements in FEV1 (0.17 to 0.35 L at 4 weeks) were seen across all 3 treatments and were sustained throughout the 52-week treatment period. Few patients (3%) were withdrawn due to worsening asthma over 1 year.