Skip to main content

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