Volume 15, Number 8—August 2009
Dispatch
Shiga Toxin–producing Escherichia coli, New Mexico, USA, 2004–2007
Table 2
Comparisons of risk for infection with STEC O157 versus non-O157 STEC types, by demographic characteristic, averaged population, New Mexico, USA, 2004–2007*
Characteristic | Unadjusted incidence rate ratio† (95% CI) | p value | Adjusted incidence rate ratio† (95% CI) | p value |
---|---|---|---|---|
Race | ||||
Other | 1 | 1 | ||
White | 3.21 (1.42–7.27) | 0.01 | 3.03 (1.34–6.90) | 0.008 |
Age, y | ||||
<5 | 1 | 1 | ||
>5 | 2.61 (1.09–6.22) | 0.03 | 2.74 (1.15–6.54) | 0.031 |
County | ||||
Urban | 1 | 1 | ||
Rural | 1.96 (0.98–3.92) | 0.05 | 1.84 (0.91–3.69) | 0.089 |
*STEC, Shiga toxin–producing Escherichia coli; O157, serotype O157:H7; CI, confidence interval.
†Corrected for overdispersion by using negative binomial distribution.