TABLE 1.

Deposition fractions as a percentage of aerosolized dose with correct inhalation (MDI with SD and DPI with QD).

Region	MDI	DPI	Relative difference (%) a
MT b	40.0	69.8	54
Trachea–B3	5.7	2.6	75
B4–B7	1.5	1.0	40
B8–B15	0.9	0.6	40
Total TB	8.1	4.2	63
Alveolar	51.9	26.1	66

Abbreviations: DPI, dry powder inhaler; MDI, metered dose inhaler; MT, mouth–throat; QD, quick and deep; SD, slow and deep; TB, tracheobronchial.

^a Relative difference is the absolute value of the difference divided by the average, multiplied by 100%.

^b Includes deposition from the MDI inhaler.