Table 4 Clinical severity and residence type of HFMD cases in Shandong province, 2009–2016.

From: Epidemiological characteristics of hand, foot, and mouth disease in Shandong, China, 2009–2016

Clinical severity

Residence type

2009

2010

2011

2012

2013

2014

2015

2016

Incidence rates (per million)

Urban

2044.0 (2027.3–2060.6)

2643.9 (2625.0–2662.9)

1764.3 (1748.9–1779.8)

1749.4 (1734.0–1764.8)

1347.1 (1333.6–1360.6)

2318.6 (2300.9–2336.3)

1929.4 (1913.3–1945.6)

2083.8 (2067.0–2100.6)

Rural

1205.3 (1197.1–1213.6)

985.6 (978.1–993.1)

679.0 (672.8–685.2)

581.6 (575.8–587.3)

504.7 (499.3–510.1)

782.3 (775.6–789.0)

502.5 (497.1–507.8)

528.6 (523.1–534.1)

Case severity risks (%)

Urban

3.25% (3.10–3.39%)

1.45% (1.37–1.54%)

2.11% (1.99–2.24%)

0.64% (0.57–0.71%)

1.07% (0.97–1.17%)

1.72% (1.62–1.82%)

0.24% (0.20–0.28%)

0.07% (0.05–0.09%)

Rural

4.83% (4.68–4.98%)

2.39% (2.27–2.50%)

2.48% (2.34–2.63%)

0.57% (0.49–0.64%)

0.76% (0.67–0.85%)

0.78% (0.70–0.85%)

0.30% (0.24–0.36%)

0.10% (0.07–0.14%)

Case fatality rates (%)

Urban

0.009% (0.001–0.016%)

0.004% (0.000–0.009%)

0.002% (0.000–0.006%)

0.002% (0.000–0.006%)

0.003% (0.000–0.008%)

0.002% (0.000–0.005%)

0.000% (0.000–0.000%)

0.000% (0.000–0.000%)

Rural

0.049% (0.034–0.064%)

0.008% (0.001–0.014%)

0.017% (0.005–0.030%)

0.003% (0.000–0.008%)

0.015% (0.002–0.028%)

0.002% (0.000–0.006%)

0.009% (0.000–0.019%)

0.000% (0.000–0.000%)