Volume 15, Number 7—July 2009
Risk Factors for Human Infection with Puumala Virus, Southwestern Germany
|Determinant||Risk ratio†||95% Confidence interval||p value‡|
|Supply of beechnut§||2.86||1.81–4.50||<0.0001|
|Cover of beech forest¶||1.94||1.69–2.22||<0.0001|
|Cover of seed plant¶||2.80||2.31–3.40||<0.0001|
|Winter temperature deviation#||1.70||1.11–2.61||0.0156|
|Spring temperature deviation#||4.49||2.86–7.06||<0.0001|
|Human population density**||1.12||1.01–1.23||0.0265|
|Year of investigation††||NA||NA||<0.0001|
*Multivariate Poisson regression analysis; NA, not applicable.
‡Likelihood ratio Test
§Good/excellent crop year referenced to a medium crop year.
¶Unit = 5%.
#Unit = 1°C.
**Unit = 500/km2.
††Dichotomized (Figure 2).
- Page created: November 08, 2010
- Page last updated: November 08, 2010
- Page last reviewed: November 08, 2010
- Centers for Disease Control and Prevention,
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