Table 1 Annual number of scrub typhus cases and incidence rate by gender, age and occupation in Anhui province, China, 2010–2020.
Features | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | Total | Mean annual incidence | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sex | Males | 267 (0.88) | 419 (1.39) | 405 (1.35) | 274 (0.90) | 685 (2.23) | 1079 (3.47) | 1075 (3.44) | 584 (1.85) | 550 (1.73) | 1144 (3.58) | 647 (2.11) | 7129 | 2.08 |
Females | 307 (1.05) | 565 (1.91) | 583 (1.96) | 503 (1.68) | 1079 (3.59) | 1345 (4.44) | 1396 (4.54) | 739 (2.39) | 609 (1.94) | 1464 (4.62) | 849 (2.80) | 9439 | 2.81 | |
Pearson chi-square values (p-value) | 4.28 (0.04) | 24.24 (< 0.01) | 33.61 (< 0.01) | 70.79 (< 0.01) | 97.44 (< 0.01) | 36.59 (< 0.01) | 47.19 (< 0.01) | 21.46 (< 0.01) | 4.02 (0.05) | 42.39 (< 0.01) | 29.24 (< 0.01) | |||
Age group | < 10 | 21 (0.28) | 38 (0.51) | 60 (0.80) | 24 (0.31) | 56 (0.71) | 92 (1.19) | 58 (0.74) | 25 (0.32) | 14 (0.18) | 35 (0.44) | 25 (0.33) | 448 | 0.53 |
10–19 | 20 (0.24) | 22 (0.28) | 30 (0.40) | 15 (0.21) | 31 (0.43) | 49 (0.70) | 31 (0.47) | 23 (0.33) | 32 (0.44) | 25 (0.34) | 23 (0.33) | 301 | 0.38 | |
20–29 | 48 (0.56) | 95 (1.28) | 81 (1.10) | 63 (0.81) | 130 (1.44) | 149 (1.60) | 136 (1.49) | 72 (0.84) | 46 (0.59) | 83 (1.19) | 35 (0.52) | 938 | 1.04 | |
30–39 | 52 (0.56) | 76 (0.89) | 78 (0.99) | 51 (0.68) | 117 (1.52) | 177 (2.28) | 151 (1.95) | 96 (1.24) | 72 (0.93) | 123 (1.60) | 82 (1.11) | 1075 | 1.25 | |
40–49 | 115 (1.03) | 181 (1.48) | 164 (1.32) | 119 (0.97) | 256 (2.20) | 396 (3.45) | 377 (3.33) | 236 (2.11) | 164 (1.51) | 341 (3.25) | 157 (1.56) | 2506 | 2.02 | |
50–59 | 114 (1.84) | 191 (3.07) | 188 (2.81) | 122 (1.72) | 314 (4.54) | 462 (6.17) | 502 (6.09) | 285 (3.27) | 278 (2.79) | 666 (5.80) | 436 (3.96) | 3558 | 3.82 | |
60–64 | 62 (2.18) | 129 (4.02) | 125 (3.65) | 139 (3.91) | 312 (9.14.) | 331 (9.66) | 346 (9.65) | 145 (4.01) | 159 (4.68) | 273 (9.57) | 110 (4.02) | 2131 | 5.86 | |
≥ 65 | 143 (2.35) | 252 (3.70) | 262 (3.62) | 244 (3.31) | 548 (7.69) | 768 (10.66) | 870 (11.70) | 441 (5.70) | 393 (4.79) | 1062 (11.97) | 628 (7.39) | 5611 | 6.63 | |
Pearson chi-square values (p-value) | 323.34 (< 0.01) | 544.84 (< 0.01) | 453.26 (< 0.01) | 597.99 (< 0.01) | 1503.10 (< 0.01) | 1728.77 (< 0.01) | 2136.90 (< 0.01) | 906.85 (< 0.01) | 896.14 (< 0.01) | 2425.45 (< 0.01) | 1432.45 (< 0.01) | |||
Farmers | Yes | 491 (1.52) | 860 (3.52) | 834 (3.21) | 690 (2.93) | 1610 (7.19) | 2114 (9.04) | 2257 (10.04) | 1202 (5.37) | 1026 (5.56) | 2397 (12.90) | 1381 (7.76) | 14,862 | 6.28 |
No | 83 (0.30) | 124 (0.35) | 154 (0.45) | 87 (0.24) | 154 (0.40) | 310 (0.81) | 214 (0.54) | 121 (0.30) | 133 (0.29) | 211 (0.47) | 115 (0.27) | 1706 | 0.40 | |
Pearson chi-square values (p-value) | 227.26 (< 0.01) | 877.06 (< 0.01) | 676.92 (< 0.01) | 808.11 (< 0.01) | 2248.23 (< 0.01) | 2481.63 (< 0.01) | 3242.06 (< 0.01) | 1748.14 (< 0.01) | 1977.53 (< 0.01) | 4966.24 (< 0.01) | 2886.93 (< 0.01) | |||
Total | 573 (0.82) | 984 (1.62) | 988 (1.46) | 777 (1.18) | 1764 (2.35) | 2424 (3.93) | 2471 (3.95) | 1323 (2.10) | 1159 (1.81) | 2608 (4.00) | 1496 (2.37) | 16,568 | 2.33 |
