Table 1 |.
Covariates and infection prediction
| Covariate | No infection (n = 10,082) | Symptomatic infection (n = 77) | Subclinical infection (n = 972) | Overall (n = 11,131) | |
|---|---|---|---|---|---|
| Sex | Male | 4,192 (41.6%) | 39 (50.6%) | 425 (43.7%) | 4,656 (41.8%) |
| Female | 5,890 (58.4%) | 38 (49.4%) | 547 (56.3%) | 6,475 (58.2%) | |
| Age (years) | Mean (s.d.) | 29.6 (22.2) | 14.5 (11.1) | 22.5 (20.8) | 28.9 (22.2) |
| Median [minimum, maximum] | 26.2 [1.00, 100] | 12.4 [1.18, 57.3] | 14.8 [1.02, 88.3] | 25.0 [1.00,100] | |
| [1, 5) | 1,696 (16.8%) | 16 (20.8%) | 229 (23.6%) | 1,941 (17.4%) | |
| [6, 18) | 2,166 (21.5%) | 38 (49.4%) | 310 (31.9%) | 2,514 (22.6%) | |
| [18, 30) | 1,732 (17.2%) | 17 (22.1%) | 153 (15.7%) | 1,902 (17.1%) | |
| [30, 50) | 2,121 (21.0%) | 5 (6.5%) | 135 (13.9%) | 2,261 (20.3%) | |
| 50+ | 2,367 (23.5%) | 1 (1.3%) | 145 (14.9%) | 2,513 (22.6%) | |
| JEV vaccination in interval | Yes | 453 (4.5%) | 1 (1.3%) | 68 (7.0%) | 522 (4.7%) |
| No | 9,629 (95.5%) | 76 (98.7%) | 904 (93.0%) | 10,609 (95.3%) | |
| Pre-interval titre (HAI) | Mean (s.d.) | 117.0 (200.0) | 31.1 (37.0) | 55.8 (83.6) | 111.0 (193.0) |
| Median [IQR] | 67.3 [14.1, 134.5] | 14.1 [10, 33.6] | 28.3 [10, 67.3] | 56.6 [14.1, 134.5] |
Predicted infections are subdivided into symptomatic and subclinical infections. Japanese encephalitis virus is denoted as JEV.