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Table 1 Demographic characteristics and etiology of Hand, Foot, and Mouth Disease, Qinghai Province, 2009–2015 (n = 14,480)

From: Epidemiological features and spatial clusters of hand, foot, and mouth disease in Qinghai Province, China, 2009–2015

 

2009

n (%)

2010

n (%)

2011

n (%)

2012

n (%)

2013

n (%)

2014

n (%)

2015

n (%)

Total

n (%)

Age group

 <6 month

13 (0.5)

30 (0.7)

4 (0.7)

9 (1.1)

17 (1.0)

26 (1.0)

11 (0.6)

110 (0.8)

 6–11 month

120 (4.9)

564 (12.4)

38 (6.3)

36 (4.5)

247 (14.7)

172 (6.4)

163 (9.4)

1340 (9.3)

 1–3 years

1468 (60.3)

2449 (53.7)

354 (58.7)

496 (62.6)

1004 (59.7)

1457 (54.4)

1009 (58.4)

8237 (56.9)

 4–5 years

602 (24.7)

1040 (22.8)

152 (25.2)

174 (22.0)

241 (14.3)

651 (24.3)

312 (18.1)

3172 (21.9)

 6–9 years

184 (7.6)

352 (7.7)

40 (6.6)

51 (6.4)

127 (7.6)

281 (10.5)

148 (8.6)

1183 (8.2)

 10– 14 years

39 (1.6)

98 (2.1)

10 (1.7)

20 (2.5)

40 (2.4)

73 (2.7)

66 (3.8)

346 (2.4)

 ≥15 years

10 (0.4)

28 (0.6)

5 (0.8)

6 (0.8)

5 (0.3)

20 (0.7)

18 (1.0)

92 (0.6)

Gender

 Male

1542 (63.3)

2828 (62.0)

371 (61.5)

495 (62.5)

1002 (59.6)

1612 (60.1)

1056 (61.1)

8906 (61.5)

 Female

894 (36.7)

1733 (38.0)

232 (38.5)

297 (37.5)

679 (40.4)

1068 (39.9)

671 (38.9)

5574 (38.5)

 Gender ratio

1.72:1

1.63:1

1.60:1

1.67:1

1.48:1

1.51:1

1.57:1

1.60:1

Case definition

 Probable cases

2339 (96.0)

4469 (98.0)

568 (94.2)

633 (79.9)

1329 (79.1)

1851 (69.1)

1121 (64.9)

1,2310 (85.0)

 Confirmed casesb

97 (4.0)

92 (2.0)

35 (5.8)

159 (20.1)

352 (20.9)

829 (30.9)

606 (35.1)

2170 (15.0)

Etiologya

 EV-A71

56 (57.7)

18 (19.6)

27 (77.1)

149 (93.7)

224 (63.6)

108 (13.0)

248 (40.9)

830 (38.2)

 CV-A16

41 (42.3)

74 (80.4)

8 (22.9)

10 (6.3)

65 (18.5)

588 (70.9)

138 (22.8)

924 (42.6)

 Other EV

0 (0.0)a

0 (0.0)a

0 (0.0)a

0 (0.0)a

63 (17.9)

133 (16.0)

220 (36.3)

416 (19.2)

Total

2436 (100.0)

4561 (100.0)

603 (100.0)

792 (100.0)

1681 (100.0)

2680 (100.0)

1727 (100.0)

14,480 (100.0)

  1. a2009 to 2012, laboratory testing was performed only for EV-A71 and CV-A16 enteroviruses
  2. bConfirmed cases are from the first 5 cases of the month in each county and the 10 cases of every week in three sentinel hospitals of the province