In 2004, the overall IHS chlamydia rate was 2.3 times higher than the U.S.
rate (727.8 and 319.6 cases per 100,000 population, respectively)
11 of the 12 IHS Areas had higher 2004 chlamydia rates compared to the
U.S. rate
3 IHS Areas (Aberdeen, Alaska, Billings) had 2004 chlamydia rates 4.9 to
5.9 times higher than the U.S. rate
In 2004, all IHS Areas had female chlamydia rates that were between 2.6
and 9.2 times higher than male rates, likely reflecting greater numbers of
women screened for this infection
During 2003-2004, overall chlamydia rates in the U.S. increased by 5.9%
(from 301.7 to 319.6), while overall IHS chlamydia rates increased by 5.6%;
among IHS Areas, one of the largest rate increases occurred in the Phoenix
Area (29% increase)
Notes:
IHS rates based on AI/AN living in service counties
U.S. rates based on all races and ethnicities
Exclusions: States with >50% of cases with unknown race excluded
Adjustments: States with ≤50% of cases with unknown race have cases
redistributed; Cases from partial IHS Area service counties are redistributed
