Basic characteristics of dengue cases reported in the study areas during the period from 2014 to 2017
| Characteristics | City | Total | ||
| Shantou | Chaozhou | Jieyang | ||
| Number of cases, number (%) | 284 (13.0) | 1716 (78.3) | 193 (8.8) | 2193 (100) |
| Type of cases, number (%) | ||||
| Probable cases | 0 (0.0) | 45 (2.6) | 0 (0.0) | 45 (2.1) |
| Confirmed cases | 284 (100.0) | 1671 (97.4) | 193 (100.0) | 2148 (97.9) |
| Median age, years (IQR) | 35.0 (23.0–49.0) | 46.0 (29.0–59.0) | 34.0 (25.0–50.0) | 43.0 (27.0–58.0) |
| Sex, number (%) | ||||
| Male | 137 (48.2) | 819 (47.7) | 110 (57.0) | 1066 (48.6) |
| Female | 147 (51.8) | 897 (52.3) | 83 (43.0) | 1127 (51.4) |
| Season of diagnosis, number (%) | ||||
| Spring | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
| Summer | 0 (0.0) | 33 (1.9) | 0 (0.0) | 33 (1.5) |
| Autumn | 281 (98.9) | 1680 (97.9) | 192 (99.5) | 2153 (98.2) |
| Winter | 3 (1.1) | 3 (0.2) | 1 (0.5) | 7 (0.3) |
| Year of diagnosis, number (%) | ||||
| 2014 | 247 (87.0) | 135 (7.9) | 86 (44.6) | 468 (21.3) |
| 2015 | 14 (4.9) | 1380 (80.4) | 6 (3.1) | 1400 (63.8) |
| 2016 | 5 (1.8) | 194 (11.3) | 0 (0.0) | 199 (9.1) |
| 2017 | 18 (6.3) | 7 (0.4) | 101 (52.3) | 126 (5.8) |