Table 2 Seroprevalence of anti-dengue virus IgM 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 | 2/27 | 0/23 | 0/40 | 5/243 | 1/177 | 8/510 |
(7.4) | (0.0) | (0.0) | (2.1) | (0.6) | (1.6) | |
35–49 | 9/48 | 2/40 | 1/65 | 0/77 | 1/114 | 13/344 |
(18.8) | (5.0) | (1.5) | (0.0) | (0.9) | (3.8) | |
50–64 | 23/101 | 10/79 | 8/134 | 0/5 | 0/11 | 41/330 |
(22.8) | (12.7) | (6.0) | (0.0) | (0.0) | (12.4) | |
≥65 | 17/50 | 1/33 | 15/124 |  |  | 33/207 |
(34.0) | (3.0) | (12.1) | Â | Â | (15.9) | |
Total | 51/226 | 13/175 | 24/363 | 5/325 | 2/302 | 95/1391 |
(22.6) | (7.4) | (6.6) | (1.5) | (0.7) | (6.8) | |
Age-standardized | 18.6% | 5.4% | 3.7% | 0.6% | 0.4% | 7.1% |