Table 2 Primary characteristics of the diagnosis and reporting of scrub typhus cases in China, 2006–2016.
Characteristics | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | Overall |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of cases | 1254 | 1340 | 2613 | 3237 | 4088 | 6020 | 8928 | 11 111 | 16 035 | 17 293 | 21 562 | 93 481 |
Number of probable cases (%) | 1049 (83.7)a | 1187 (88.6) | 2360 (90.3) | 2939 (90.8) | 3811 (93.2) | 5630 (93.5) | 8555 (95.8) | 10 536 (94.8) | 15 339 (95.7) | 16 696 (96.5) | 20 997 (97.4) | 89 099 (95.3) |
Number of confirmed cases (%) | 205 (16.3) | 153 (11.4) | 253 (9.7) | 298 (9.2) | 277 (6.8) | 390 (6.5) | 373 (4.2) | 575 (5.2) | 696 (4.3) | 597 (3.5) | 565 (2.6) | 4382 (4.7) |
Number of fatal cases | 0 | 1 | 3 | 0 | 11 | 6 | 9 | 4 | 8 | 3 | 12 | 5 |
Mortality rate (per 100 000) | 0 | 0.00008 | 0.00023 | 0 | 0.00082 | 0.00045 | 0.00066 | 0.00029 | 0.00058 | 0.00022 | 0.00087 | 0.0003 |
Number of cases by medical care institution level | ||||||||||||
 City hospitals (n, %) | 324 (25.8) | 315 (23.5) | 688 (26.3) | 853 (26.4) | 1118 (27.3) | 1527 (25.4) | 2585 (29.0) | 3244 (29.2) | 4915 (30.7) | 4838 (28.0) | 5488 (25.5) | 25 895 (27.7) |
 County hospitals (n, %) | 688 (54.9) | 749 (55.9) | 1376 (52.7) | 1671 (51.6) | 2144 (52.4) | 3249 (54.0) | 4507 (50.5) | 5495 (49.5) | 8264 (51.5) | 9574 (55.4) | 11 966 (55.5) | 49 683 (53.1) |
 Primary medical centres (n, %) | 201 (16.0) | 247 (18.4) | 460 (17.6) | 648 (20.0) | 760 (18.6) | 1141 (19.0) | 1743 (19.5) | 2331 (21.0) | 2855 (17.8) | 2834 (16.4) | 3758 (17.4) | 16 978 (18.2) |
Number of medical care institutions reporting cases | 229 | 291 | 433 | 455 | 523 | 749 | 906 | 1009 | 1134 | 1229 | 1474 | 2527 |
 City hospitals (n, %) | 73 (31.9) | 78 (26.8) | 117 (27.0) | 135 (29.7) | 147 (28.1) | 180 (24.0) | 219 (24.2) | 260 (25.8) | 287 (25.3) | 290 (23.6) | 318 (21.6) | 505 (20.0) |
 County hospitals (n, %) | 101 (44.1) | 127 (43.6) | 196 (45.3) | 181 (39.8) | 209 (40.0) | 292 (39.0) | 344 (38.0) | 381 (37.8) | 446 (39.3) | 513 (41.7) | 624 (42.3) | 915 (36.2) |
 Primary medical centres (n, %) | 55 (24.0) | 85 (29.2) | 119 (27.5) | 137 (30.1) | 165 (31.5) | 276 (36.8) | 342 (37.7) | 367 (36.4) | 400 (35.3) | 424 (34.5) | 531 (36.0) | 1103 (43.6) |
Interval from illness onset to diagnosis (median, IQR) | 7 (3–11)b | 7 (3–10) | 7 (3–10) | 6 (2–10) | 6 (2–9) | 5 (2–9) | 5 (2–9) | 5 (2–9) | 5 (2–9) | 5 (2–8) | 5 (2–8) | 5 (2–9) |
 City hospitals (median, IQR) | 8 (4–14) | 8 (4–12) | 8 (3–14) | 7 (2–12) | 7 (3–13) | 7 (2–12) | 6 (2–11) | 7 (2–11) | 6 (2–11) | 6 (1–11) | 6 (1–10) | 6 (2–11) |
 County hospitals (median, IQR) | 7 (3–11) | 7 (3–10) | 7 (3–10) | 6 (2–9) | 6 (3–9) | 6 (2–9) | 5 (2–8) | 5 (2–8) | 5 (2–8) | 5 (3–8) | 5 (2–8) | 5 (2–8) |
 Primary medical centres (median, IQR) | 6 (3–8.5) | 5 (2–8) | 4 (1–8) | 5 (2–8) | 3 (1–7) | 4 (1–6) | 4 (1–6) | 4 (1–6) | 4 (1–7) | 3 (1–6) | 3 (1–6) | 4 (1–7) |