Table 3.

Percentage of patients with ≥1 exacerbation, and mean number of exacerbations and exacerbation days per patient per year

	Tiotropium	Placebo	Difference	95% CI	p value
Patients with ≥1 exacerbation, %	38.0	45.1	−7.2	−15.4, 1.00	0.1013
Number of exacerbations/patient/year, n	1.05	1.83	−0.77	−1.37, −0.20	0.0287
Number of exacerbation days/patient/year, days	10.5	20.6	−10.1	−16.5, −3.64	0.0213