Table 1.

Mortality rates and CFRD prevalence and incidence for consecutive time intervals

	1992−1997	1998−2002	2003−2008
Patients seen in a clinic during the interval	752	702	647
Female subjects (%)	53	53	53
CFRD prevalence at the end of the interval (%)	20 ± 2a	30 ± 2b	33 ± 2b
CFRD incidence per 100 person-years	3.0 ± 0.3a	4.0 ± 0.4b	2.7 ± 0.3a
CFRD mortality rate per 100 person-years	6.7 ± 1.3a	5.4 ± 0.9a	3.5 ± 0.6b
Patients diagnosed with CFRD during the interval/those who were diagnosed and died within the same interval	108/18a	102/12a	61/2b
Total CF population mortality rate per 100 person-years	1.2 ± 0.2	1.6 ± 0.2	1.8 ± 0.2
Non-CFRD mortality rate per 100 person-years	0.5 ± 0.1a	0.6 ± 0.2ab	1.0 ± 0.2b

Data are means ± SE unless otherwise indicated. a, b Comparisons are between time intervals within each row. Rates that do not share a letter are significantly different (P < 0.05); rates that share a letter are not significantly different. Rows with no letters have no significant differences. During each interval, for all rates there were no significant differences between male and female subjects.