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Number of pyrethrin/pyrethroid poisoning cases among Oregon and Washington State residents, incidence rates, and incidence rate ratios, by year, 2001–2005 (n=407)
aState population estimates from U.S. Census Bureau
bIncidence rate per million residents
cCompares rate of pyrethrin/pyrethroid poisoning cases among Oregon residents for a given year to Washington residents
CI = confidence interval
IRR = incidence rate ratio
