Figure 1.

Bar graph showing the proportion of patients with cystic fibrosis (CF) by age group in the U.S. CF Registry population in 2004 who experience no exacerbations during the year, one exacerbation during the year, two exacerbations during the year, or three or more exacerbations during the year. Pulmonary exacerbations were treated in the hospital or at home with a course of intravenous antibiotics. Overall, 65% of patients did not have an acute exacerbation in 2004. Reprinted by permission from Reference 103. Copyrighted 2005 by the Cystic Fibrosis Foundation.