Table 1. Characteristics of hemorrhagic fever with renal syndrome, Qingdao, China, 2007–2015.
| Years | Urban districts | Rural-urban fringe zones | Rural counties | Statistical tests | ||||
|---|---|---|---|---|---|---|---|---|
| No. of cases (incidence /105) | No. of deaths (mortality /105) | No. of cases (incidence/105) | No. of deaths (mortality/105) | No. of cases (incidence/105) | No. of deaths (mortality/105) | Incidencea | Mortalityb | |
| 2007 | 1 (0.06) | 0 (0) | 7 (0.69) | 0 (0) | 119 (2.42) | 4 (0.08) | χ2=51.5, P<0.001 | P=0.759 |
| 2008 | 2 (0.11) | 0 (0) | 11 (1.09) | 1 (0.10) | 214 (4.32) | 3 (0.06) | χ2=94.9, P <0.001 | P=0.314 |
| 2009 | 2 (0.11) | 0 (0) | 9 (0.89) | 1 (0.10) | 144 (2.91) | 5 (0.10) | χ2=60.0, P <0.001 | P=0.459 |
| 2010 | 3 (0.16) | 0 (0) | 4 (0.40) | 0 (0) | 174 (3.51) | 3 (0.06) | χ2=83.5, P <0.001 | P=0.714 |
| 2011 | 4 (0.19) | 0 (0) | 10 (0.61) | 0 (0) | 236 (4.72) | 12 (0.24) | χ2=141.0, P <0.001 | P=0.010 |
| 2012 | 6 (0.29) | 0 (0) | 21 (1.29) | 0 (0) | 284 (5.60) | 3 (0.06) | χ2=146.8, P <0.001 | P=0.763 |
| 2013 | 4 (0.19) | 0 (0) | 11 (0.67) | 0 (0) | 221 (4.30) | 3 (0.06) | χ2=124.9, P <0.001 | P=0.762 |
| 2014 | 8 (0.38) | 0 (0) | 9 (0.54) | 0 (0) | 191 (3.69) | 4 (0.08) | χ2=98.7, P <0.001 | P=0.385 |
| 2015 | 4 (0.19) | 0 (0) | 2 (0.12) | 0 (0) | 145 (2.78) | 2 (0.04) | χ2=90.3, P <0.001 | P=1.000 |
| Total | 34 (0.19) | 0 (0) | 84 (0.69) | 2 (0.02) | 1728 (3.81) | 39 (0.09) | χ2=872.1, P <0.001 | χ2=21.3, P <0.001 |
a
Chi-square tests was applied to evaluate the difference of HFRS incidence among urban districts, rural-urban fringe zones, and rural countries.
b
Fisher exact probability test was applied to evaluate the difference of HFRS mortality among urban districts, rural-urban fringe zones, and rural countries.