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Volume 13, Number 9—September 2007

Research

Landscape Elements and Hantaan Virus–related Hemorrhagic Fever with Renal Syndrome, People’s Republic of China

Lei Yan*1, Li-Qun Fang*1, Hua-Guo Huang*, Long-Qi Zhang*, Dan Feng†, Wen-Juan Zhao†, Wen-Yi Zhang†, Xiao-Wen Li*, and Wu-Chun Cao†1Comments to Author 
Author affiliations: *State Key Laboratory of Remote Sensing Science, Beijing, People’s Republic of China; †State Key Laboratory of Pathogen and Biosecurity, Beijing, People’s Republic of China;

Main Article

Table 4

Result of multivariate logistic regression analysis in relation to HFRS occurrence in China, 1994–1998*

p value OR (95% CI)
Elevation, m
<100 1.00
100–200 0.75 0.93 (0.61–1.43)
201–500 0.47 0.87 (0.59–1.28)
501–1,000 <0.01 0.58 (0.39–0.86)
1,001–1,500 <0.01 0.27 (0.17–0.43)
1,501–2,000 <0.01 0.22 (0.12–0.39)
2,001–3,000 <0.01 0.31 (0.16–0.60)
>3,000
<0.01
0.05 (0.01–0.25)
NDVI <0.01
<0.1 1.00
0.1–0.2 0.73 1.12 (0.60–2.11)
0.2–0.3 0.25 1.44 (0.77–2.69)
>0.3
0.22
0.64 (0.32–1.29)
Precipitation, mm/y <0.01
<400 1.00
400–800 <0.01 9.94 (3.92–25.23)
801–1,200 <0.01 8.16 (2.97–22.44)
>1,200
<0.01
4.95 (1.70–14.39)
Annual cumulative air temperature, °C <0.01
<1,600 1.00
1,600–3,400 <0.01 0.47 (0.28–0.79)
3,401–4,500 0.41 1.25 (0.73–2.15)
4,501–8,000 0.17 1.58 (0.82–3.07)
>8,000
0.14
2.76 (0.71–10.72)
Soil or land-use type
Ferralisol <0.01 0.65 (0.46–0.90)
Desert <0.01 0.59 (0.41–0.84)
Skeletol primitive <0.01 0.66 (0.50–0.88)
Semihydromorphic <0.01 1.53 (1.14–2.06)
Alpine <0.01 0.23 (0.07–0.73)
Timber forest <0.01 2.04 (1.48–2.81)
Orchard <0.01 1.97 (1.18–3.29)
Sparse woods <0.01 0.60 (0.46–0.78)
Bare land 0.02 0.45 (0.23–0.87)

*HFRS, hemorrhagic fever with renal syndrome; NVDI, normalized difference vegetation index; OR, odds ratio; CI, confidence interval.

Main Article

1These authors contributed equally to this article.

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