The ELLIPTA DPI was preferred to the BREEZHALER by @ % of subjects ( odds ratio -LSB- OR -RSB- @ , @ % confidence interval -LSB- CI -RSB- @-@ @ ; P-value not applicable for this inhaler ) for ease of use , by @ % of subjects ( OR @ , CI @-@ @ ; P < @ ) for ease of determining the number of doses remaining in the inhaler , by @ % for number of steps required , and by @ % for time needed for handling the inhaler .