Table 1 Incidence rates (per million) of HFMD by age groups in Shandong province, 2009–2016.

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

Age groups

2009

2010

2011

2012

2013

2014

2015

2016

<6 months

2825.5 (2669.9–2981.2)

2089.0 (1955.2–2222.9)

1727.5 (1605.8–1849.2)

1928.3 (1799.7–2056.9)

2017.6 (1886.1–2149.1)

2388.1 (2245.0–2531.2)

2738.5 (2585.3–2891.7)

1944.0 (1814.9–2073.1)

6–11 months

46520.1 (45940.7–47099.5)

38114.3 (37589.9–38638.7)

23579.4 (23166.9–23991.8)

19602.8 (19226.7–19978.9)

22086.0 (21686.8–22485.3)

22865.6 (22459.4–23271.8)

29086.8 (28628.6–29544.9)

15042.1 (14712.6–15371.6)

12–23 months

40790.2 (40408.7–41171.6)

36839.4 (36476.9–37201.9)

24129.9 (23836.5–24423.3)

22594.7 (22310.8–22878.7)

20843.2 (20570.5–21115.9)

30652.3 (30321.6–30983.0)

24698.3 (24401.4–24995.1)

26809.3 (26500.0–27118.5)

24–59 months

17956.7 (17811.6–18101.8)

21026.7 (20869.7–21183.6)

14206.6 (14077.6–14335.7)

13187.3 (13062.9–13311.6)

9280.4 (9176.1–9384.7)

17897.2 (17752.4–18042.0)

11150.4 (11036.1–11264.7)

13864.6 (13737.1–13992.1)

5–9 years

1801.6 (1764.2–1838.9)

2082.2 (2042–2122.3)

1793.3 (1756.1–1830.5)

1768.7 (1731.8–1805.7)

1133.7 (1104.1–1163.3)

2399.2 (2356.1–2442.3)

1472.0 (1438.3–1505.8)

2026.6 (1987.0–2066.2)

10–14 years

234.1 (220.4–247.8)

181.1 (169–193.1)

145.7 (134.8–156.5)

161.4 (150–172.8)

126.6 (116.5–136.7)

208.1 (195.2–221.1)

159.9 (148.6–171.3)

202.5 (189.7–215.2)

≥15 years

4.7 (4.2–5.1)

5.4 (4.9–5.9)

4.4 (3.9–4.8)

5.3 (4.8–5.8)

6.0 (5.5–6.5)

8.6 (8.0–9.3)

8.4 (7.8–9.1)

6.6 (6.0–7.1)

Total

1453.7 (1446–1461.3)

1476.7 (1469–1484.4)

1000.4 (994.1–1006.7)

927.4 (921.3–933.5)

754.1 (748.6–759.6)

1237.2 (1230.1–1244.2)

925.0 (918.9–931.1)

989.1 (982.8–995.4)