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Volume 15, Number 12—December 2009


Spatiotemporal Dynamics of Hemorrhagic Fever with Renal Syndrome, Beijing, People’s Republic of China

Author affiliations: Li-Qun Fang,1 Wen-Juan Zhao,1 Sake J. de Vlas, Wen-Yi Zhang, Song Liang, Caspar W.N. State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, People’s Republic of China (L.-Q. Fang, W.-J. Zhao, W.-Y. Zhang, L. Yan, D. Feng, H. Yang, W.-C. Cao); University Medical Center Rotterdam, Rotterdam, the Netherlands (L.-Q. Fang, S.J. de Vlas, C.W.N. Looman); Second Affiliated Hospital of Chinese People’s Liberation Army General Hospital, Beijing (W.-J. Zhao); Ohio State University, Columbus, Ohio, USA (S. Liang); Chinese Center for Disease Control and Prevention, Beijing (L.-P. Wang, J.-Q. Ma)

Main Article


Poisson regression analysis of environmental factors in relation to HFRS incidence in Beijing, People’s Republic of China*

Variable (unit)† % Change‡ 95% CI p value
Elevation (10 m) −0.47 −15.9 to 17.8 0.96
Built-up land (1%) −0.82 −1.50 to 0.14 0.02
Water body (1%) −0.29 −5.88 to 5.63 0.92
Dry land (1%) 1.44 −0.21 to 3.12 0.09
Scrub (1%) −1.26 −4.66 to 2.52 0.48
Orchard (1%) 4.33 1.71 to 7.00 <0.01
Irrigable land (1%) 1.22 −0.10 to 2.56 0.07
Rice paddies (1%) 27.8 4.4 to 56.3 0.02
Forest (1%) 0.60 −0.52 to 1.73 0.30

*HFRS, hemorrhagic fever with renal syndrome; CI, confidence interval.
†Built-up land comprised human residences, industrial land, and land occupied by all kinds of roads. Water body comprised lakes, reservoirs, ponds, and watercourses of all kinds. Dry land comprised nonirrigated fields for planting crops. Scrub comprised bushes and shrubs. Orchards were areas producing fruits and raw materials for industry or for beverages. Irrigable land comprised fields under irrigation for planting crops. Rice paddies were fields for planting rice. Forest included areas with dense trees.
‡Percentage change in incidence rate if the value of the variable changed by the given amount.

Main Article

1These authors contributed equally to this article.