Table 4 Seroprevalence of anti-dengue virus IgG stratified by age groups and study sites
| Â | West Central | North District | East District | A factory in Ana District | A factory in Yongkang District | Total |
|---|---|---|---|---|---|---|
Age group | +/N | +/N | +/N | +/N | +/N | +/N |
(%) | (%) | (%) | (%) | (%) | (%) | |
20–34 | 6/27 | 0/23 | 3/40 | 11/243 | 6/177 | 26/510 |
(22.2) | (0.0) | (7.50) | (4.5) | (3.4) | (5.1) | |
35–49 | 9/48 | 8/40 | 6/65 | 4/77 | 9/114 | 36/344 |
(18.8) | (20.0) | (9.23) | (5.2) | (7.9) | (10.5) | |
50–64 | 42/101 | 16/79 | 22/134 | 0/5 | 0/11 | 80/330 |
(41.6) | (20.3) | (16.42) | (0.0) | (0.0) | (24.2) | |
≥65 | 35/50 | 15/33 | 50/124 |  |  | 100/207 |
(70.0) | (45.5) | (40.32) | Â | Â | (48.3) | |
Total | 92/226 | 39/175 | 81/363 | 15/325 | 15/302 | 242/1391 |
(40.7) | (22.3) | (22.3) | (4.6) | (5.0) | (17.4) | |
Age-standardized | 32.6% | 17.7% | 14.8% | 2.9% | 3.5% | 17.6% |