Safety
Treatment-emergent adverse events (TEAEs) occurred in about two-thirds of patients in each trial arm, although TEAEs related to study treatment were more common with the two triple-therapy combinations and with BFF than with GFF.
TEAEs leading to study discontinuation occurred in 5.5% of patients on BGF 320 mcg, 4% on BGF 160 mcg, 4.5% on GFF, and 3.2% on BFF.
Confirmed major adverse cardiovascular events occurred in 0.8% and 1.5% in the BGF 320- and 160-mcg groups, respectively, in 1.8% of patients in the GFF arm, and 1.5% in the BFF arm.
Confirmed pneumonia was seen in 2.6% of patients in each BGF arm, 2.2% in the GFF arm, and 3.6% in the BFF arm.
Selected population
In a comment, David Mannino, MD, medical director of the COPD Foundation, who was not involved in the study, noted that the enrollment criteria for ETHOS tended to skew the population toward patients with severe disease.
In the trial, all patients were receiving at least two inhaled maintenance therapies at the time of screening, and had a postbronchodilator ratio of FEV1 to forced vital capacity of less than 0.7, with a postbronchodilator FEV1 of 25%-65% of the predicted normal value. The patients all had a smoking history of at least 10 pack-years and a documented history of at least one moderate or severe COPD exacerbation in the year before screening.
“The question was whether they would see the same results in people with more moderate impairment, and the answer in this subanalysis is ‘yes.’ The findings weren’t identical between patients with severe and moderate disease, but there were similarities with what was seen in the overall ETHOS study,” he said.
The ETHOS Trial was supported by Pearl Therapeutics. Dr. Ferguson reported grants, personal fees, and nonfinancial support from AstraZeneca during the conduct of the study; and grants, fees, and nonfinancial support from Pearl and others. Dr. Mannino reports recruitment to an advisory board for AstraZeneca.