A Double-blind, Randomised, Placebo Controlled, Three-way Cross-over Study With an Open Label Positive Control (Moxifloxacin) to Assess the Influence of Inhaled Tiotropium Once Daily Over Twelve Days on the QTC Interval of the ECG in Healthy Male and Female Volunteers

The objective of this study is to demonstrate that tiotropium does not prolong the QT interval more than placebo. This will be achieved by testing non-inferiority hypothesis.

Study Hypothesis:

There is one primary variable to be tested for non-inferiority: tiotropium high dose compared to placebo:

H0: µ(TIO,12) - µ(PBO,12) >= 10 ms vs. H1: µ(TIO,12) - µ(PBO,12) < 10 ms where µ(TIO,12), µ(PBO,12) represent the mean change from baseline QTcF between 5 minutes and 2 hours after 12 days of treatment (taking the mean of the time-matched differences between baseline and post-baseline values in each treatment period) with tiotropium 54 µg, or placebo, respectively.

If the data suggest that the Fridericia correction is poor for the study population, an alternative correction will be explored (QTcN). The other correction formula would be used as a replacement for the Fridericia correction and would be defined before unblinding of the data.