Table 5.

—Hazard Ratios of Time to First Exacerbation During 24 Months of Follow-up in the CAMP

		1-Year Follow-up		2-Year Follow-up
Category	No.	Events, %a	HR (95% CI)b	Events, %a	HR (95% CI)b
EPR-3 definition
Low risk	371	24.8	0.6 (0.5-0.7)c	39.1	0.6 (0.5-0.8)c
High risk	140	47.9	1.9 (1.4-2.4)d	67.9	1.9 (1.5-2.4)d
ATS/ERS definition
Low risk	341	48.8	0.7 (0.6-0.8)d	59.3	0.7 (0.6-0.9)d
High risk	140	69.3	1.6 (1.3-2.0)d	77.9	1.5 (1.2-1.9)d

ATS = American Thoracic Society; EPR-3 = Expert Panel Report 3; ERS = European Respiratory Society; See Table 1 and 3 legends for expansion of other abbreviations.

^aPercentage of subjects in each category that had asthma exacerbations during the follow-up period.

^bHR adjusted for age, sex, race, and treatment group.

^cP < .05.

^dP < .001.