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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Clin Microbiol Infect. 2009 Oct;15(10):947–950. doi: 10.1111/j.1469-0691.2009.02877.x

Table 2.

Age-adjusted incidence rates of Escherichia coli bloodstream infection for the warmest four months compared to the remainder of the year, 1998-2007.

Gender IR (95% CI)
 IRR (95% CI)
June - September Rest of the year
Female 58.8 (48.3 – 69.2) 42.6 (36.3 – 48.8) 1.38 (1.09-1.75)
Male 40.5 (30.2 – 50.8) 30.9 (24.4 – 37.3) 1.31 (0.95-1.81)
Overall* 50.2 (42.9 – 57.5) 37.1 (32.7 – 41.5) 1.35 (1.12-1.66)

NOTE. IR: incidence rate per 100,000 person-years, CI: confidence intervals, IRR: incidence rate ratio.

*

Overall incidence rates are gender-adjusted for US white 2000 census.