Table 1.

Study Data Details: Duration, Treatment Arms, FEV₁ Measurement Schedule

	Study A	Study B	Study C
Study duration	12 months	6 months	12 months
No of patients	1740	1604	1042
Treatment arms	Placebo	Placebo
	Formoterol DPI 9 μg BID	Formoterol DPI 9 μg BID	Formoterol DPI 9 μg BID
	Budesonide/formoterol pMDI 160/9 μg BID	Budesonide/formoterol pMDI 160/9 μg BID	Budesonide/formoterol pMDI 160/9 μg BID
	Budesonide/formoterol pMDI 320/9 μg BID	Budesonide/formoterol pMDI 320/9 μg BID	Budesonide/formoterol pMDI 320/9 μg BID
		Budesonide pMDI 320 μg BID
		Budesonide pMDI 320 μg BID + formoterol DPI 9 μg BID
FEV1 measurements	Baseline, 1, 2, 4, 6, 9, 12 months	Baseline, 1, 2, 4, 6 months	Baseline, 1, 2, 4, 6, 9, 12 months

Abbreviations: BID, twice daily; DPI, dry powder inhaler; no, number; pMDI, pressurized metered dose inhaler.