The ELLIPTA DPI was preferred to the BREEZHALER by 89 % of subjects ( odds ratio [ OR ] 70.14 , 95 % confidence interval [ CI ] 33.69-146 .01 ; P-value not applicable for this inhaler ) for ease of use , by 63 % of subjects ( OR 2.98 , CI 1.87-4 .77 ; P < 0.0001 ) for ease of determining the number of doses remaining in the inhaler , by 91 % for number of steps required , and by 93 % for time needed for handling the inhaler .