Table 2.

Pulmonary function before and after switching from the HandiHaler to the Respimat

N=24	Before Respimat treatment	After Respimat treatment	P-value
VC (L)	3.01±0.68	3.10±0.60	0.018
IC (L)	2.01±0.60	2.05±0.55	0.218
FVC (L)	2.99±0.69	3.07±0.61	0.108
FEV1 (L)	1.39±0.55	1.43±0.59	0.195
V50	0.57±0.41	0.61±0.44	0.095
V25	0.18±0.08	0.19±0.09	0.180
V50/V25	2.95±1.27	2.93±1.10	0.396

Notes: Data presented as the mean ± standard deviation. Significance at P<0.05.

Abbreviations: VC, vital capacity; IC, inspiratory capacity; FVC, forced vital capacity; FEV₁, forced expiratory volume in 1 second; V₅₀, expiratory flow at 50% of vital capacity; V₂₅, expiratory flow at 25% of vital capacity.