Division of Epidemic Intelligence Service, Korea Centers for Disease Control and Prevention, Seoul, Korea
© 2010 Published by Elsevier B.V. on behalf of Korea Centers for Disease Control and Prevention.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Item | Male | Female | Total | p∗ |
---|---|---|---|---|
Age (yr) | ||||
<50 | 415 (24.8) | 453 (16.3) | 868 (19.5) | <0.001 |
50–59 | 342 (20.4) | 600 (21.6) | 942 (21.1) | |
60–69 | 431 (25.7) | 741 (26.6) | 1,172 (26.3) | |
≥70 | 488 (29.1) | 990 (35.6) | 1,478 (33.1) | |
Occupation | ||||
Farmers | 750 (50.4) | 1,232 (47.0) | 1,982 (47.8) | 0.037 |
Non-farmers | 739 (49.6) | 1,390 (53.0) | 2,129 (52.2) | |
Region | ||||
Urban | ||||
Seoul | 49 (3.1) | 58 (2.2) | 107 (2.5) | |
Busan | 112 (7.0) | 176 (6.6) | 288 (6.8) | |
Daegu | 36 (2.3) | 65 (2.4) | 101 (2.4) | |
Inchon | 32 (2.0) | 47 (1.8) | 79 (1.9) | |
Gwangju | 41 (2.6) | 52 (2.0) | 93 (2.2) | |
Daejeon | 73 (4.6) | 95 (3.6) | 168 (3.9) | |
Ulsan | 68 (4.3) | 124 (4.7) | 192 (4.5) | |
Sub-total | 411 (25.7) | 617 (23.2) | 1,028 (24.2) | |
Rural | ||||
Gangwon | 7 (0.4) | 31 (1.2) | 38 (0.9) | |
Gyeonggi | 155 (9.7) | 186 (7.0) | 341 (8.0) | |
Chungbuk | 50 (3.1) | 120 (4.5) | 170 (4.0) | |
Chungnam | 233 (13.9) | 380 (14.3) | 603 (14.2) | |
Jeonbuk | 233 (14.6) | 417 (15.7) | 650 (15.3) | |
Jeonnam | 209 (13.1) | 429 (16.2) | 63 8 (15.0) | |
Gyeongbuk | 114 (7.1) | 199 (7.5) | 313 (7.4) | |
Gyeongnam | 192 (12.0) | 268 (10.1) | 460 (10.8) | |
Jeju | 6 (0.4) | 7 (0.3) | 13 (0.3) | |
Sub-total | 1,189 (74.3) | 2,037 (76.8) | 3,226 (75.8) | |
Month | ||||
January–September | 131 (7.8) | 192 (6.9) | 323 (7.3) | 0.486 |
October | 907 (54.3) | 1,482 (53.3) | 2,389 (53.7) | |
November | 600 (35.9) | 1,049 (37.7) | 1,649 (37.0) | |
December | 33 (2.0) | 58 (2.1) | 91 (2.0) | |
Infection risk factor | ||||
Only fieldwork† | 673 (46.3) | 1,135 (46.8) | 1,808 (46.6) | 0.706 |
Only outdoor activity‡ | 692 (47.7) | 1,161 (47.9) | 1,853 (47.8) | |
Both fieldwork and outdoor activity | 87 (6.0) | 130 (5.4) | 217 (5.6) | |
Non-recognized infection risk factor | ||||
Impossible to estimate | 198 (88.4) | 341 (95.0) | 539 (92.5) | 0.003 |
Possible to estimate | 26 (11.6) | 18 (5.0) | 44 (7.5) | |
Major symptoms | ||||
Fever | 1,450 (86.5) | 2,433 (87.4) | 3,883 (87.0) | — |
Chill | 1,052 (62.8) | 1,739 (62.4) | 2,791 (62.6) | |
Eschar | 1,254 (74.8) | 2,167 (77.8) | 3,421 (76.7) |
Item | Urban* | Rural | Total | p† |
---|---|---|---|---|
Gender | ||||
Male | 411 (40.0) | 1,189 (36.9) | 1,600 (37.6) | 0.072 |
Female | 617 (60.0) | 2,037 (63.1) | 2,654 (62.4) | |
Age (yr) | ||||
<50 | 265 (25.8) | 564 (17.5) | 829 (19.5) | <0.001 |
50–59 | 259 (25.2) | 620 (19.2) | 879 (20.7) | |
60–69 | 277 (26.9) | 856 (26.5) | 1,133 (26.6) | |
≥70 | 227 (22.1) | 1,185 (36.7) | 1,412 (33.2) | |
Occupation | ||||
Farmers | 149 (16.4) | 1,752 (58.1) | 1,901 (48.5) | <0.001 |
Non-farmers | 757 (83.6) | 1,261 (41.9) | 2,018 (51.5) | |
Month | ||||
January–September | 76 (7.4) | 202 (6.3) | 278 (6.5) | 0.514 |
October | 541 (52.7) | 1,729 (53.7) | 2,270 (53.4) | |
November | 385 (37.5) | 1,227 (38.1) | 1,612 (38.0) | |
December | 24 (2.3) | 63 (2.0) | 87 (2.0) | |
Infection risk factor | ||||
Only fieldwork‡ | 125 (14.8) | 1,612 (56.6) | 1,737 (47.0) | <0.001 |
Only outdoor activity§ | 696 (82.4) | 1,051 (36.9) | 1,747 (47.3) | |
Both fieldwork and outdoor activity | 24 (2.8) | 184 (6.5) | 208 (5.6) | |
Outdoor activities | ||||
Non-farmers irregularly participate in agricultural activities | 241 (33.5) | 484 (39.2) | 725 (37.1) | <0.012 |
Climbing and tracking | 135 (18.8) | 199(16.1) | 334 (17.1) | 0.135 |
Gathering chestnuts | 100 (13.9) | 186 (15.1) | 286 (14.6) | 0.479 |
Government-run public work projects∥ | 46 (6.4) | 57 (4.6) | 103 (5.3) | 0.090 |
Mowing around graves | 53 (7.4) | 81 (6.6) | 134 (6.9) | 0.498 |
Others | 188 (26.1) | 298 (24.1) | 486 (24.9) | 0.328 |
‡ Fieldwork was defined as continuous agricultural, forestry, or stock breeding work, as well as working in vegetable gardens.
Item | Seoul | Busan | Daegu | Inchon | Gwangju | Daejeon |
---|---|---|---|---|---|---|
Gender | ||||||
Male | 49 (45.8) | 112 (38.9) | 36 (35.6) | 32 (40.5) | 73 (43.5) | 41 (44.1) |
Female | 58 (54.2) | 176 (61.1) | 65 (64.4) | 74 (59.5) | 95 (56.5) | 52 (55.9) |
Age (yr) | ||||||
<50 | 36 (36.6) | 64 (22.2) | 22 (21.8) | 36 (45.6) | 38 (22.6) | 30 (32.3) |
50–59 | 24 (22.4) | 89 (30.9) | 26 (25.7) | 14 (17.7) | 40 (23.8) | 15 (16.1) |
60–69 | 28 (26.2) | 74 (25.7) | 28 (27.7) | 15 (19.0) | 44 (26.2) | 26 (28.0) |
≥70 | 19 (17.8) | 61 (21.2) | 25 (24.8) | 14 (17.7) | 46 (27.4) | 22 (23.7) |
Month | ||||||
January–September | 9 (7.8) | 18 (6.2) | 15 (14.6) | 13 (15.9) | 7 (4.1) | 10 (9.3) |
October | 81 (69.8) | 126 (43.6) | 58 (56.3) | 40 (48.8) | 105 (61.8) | 67 (62.6) |
November | 26 (22.4) | 137 (47.4) | 29 (28.2) | 26 (31.7) | 55 (32.4) | 26 (24.3) |
December | 0 (0.0) | 8 (2.8) | 1 (1.0) | 3 (3.7) | 3 (1.8) | 4 (3.7) |
Infection risk factor | ||||||
Only fieldwork∗ | 2 (2.0) | 25 (9.7) | 25 (27.0) | 7 (11.1) | 22 (14.1) | 20 (27.4) |
Only outdoor activity† | 97 (97.0) | 229 (89.1) | 62 (66.0) | 54 (85.7) | 128 (82.1) | 50 (68.5) |
Both fieldwork and outdoor activity | 1 (1.0) | 3 (1.2) | 7 (7.4) | 2 (3.2) | 6 (3.8) | 3 (4.1) |
Outdoor activities | ||||||
Non-farmers irregularly participate in agricultural activities | 24 (24.5) | 94 (40.5) | 28 (40.6) | 19 (33.9) | 30 (22.4) | 17 (32.1) |
Climbing and tracking | 19 (19.4) | 44 (19.0) | 12 (17.4) | 5 (8.9) | 30 (22.4) | 10 (18.9) |
Gathering chestnuts | 14 (14.3) | 18 (7.8) | 5 (7.2) | 9 (16.1) | 28 (20.9) | 7 (13.2) |
Government-run public work projects‡ | 1 (1.0) | 33 (14.2) | 1 (1.4) | 1 (1.8) | 6 (4.5) | 0 (0.0) |
Mowing around graves | 17 (17.3) | 10 (4.3) | 1 (1.4) | 9 (16.1) | 8 (6.0) | 6 (11.3) |
Others | 31 (31.6) | 48 (20.7) | 29 (40.6) | 18 (32.1) | 29 (21.6) | 19 (34.0) |
∗ Fieldwork was defined as continuous agricultural, forestry, or stock breeding work, as well as working in vegetable gardens.