Table 3.

Differences in exacerbation rate* per patient between groups

Time	Self management (SM) (n=53)	Routine monitoring (RM) (n=55)	Usual care (UC) (n=48)	Rate ratio (95% CI)†
				SM v UC	RM v UC
Baseline to 12 months	2.83	3.25	2.73	1.10 (0.86 to 1.40)	1.25 (0.98 to 1.58)
12-24 months	2.45	2.38	2.17	1.16 (0.81 to 1.67)	1.15 (0.80 to 1.65)

*Measured by automated telephonic exacerbation assessment system.

†Weighted rate ratios were tested for statistical significance by using negative binomial regression analyses.