Table 3.
JEV IgM testing results and positivity rate by age group and province, People's Republic of China*
| Characteristic | Province/prefecture | |||
|---|---|---|---|---|
| Shandong/Jinan(n = 719) % positive (no. positive/no.tested) | Hubei/Yichang(n = 457) % positive (no. positive/no.tested) | Hebei/Shijiazhuang(n = 309) % positive (no. positive/no.tested) | Guangxi/Guigang(n = 809) % positive (no. positive/no.tested) | |
| Total | 12.7 (91/719) | 4.2 (19/457) | 3.2 (10/309) | 11.5 (93/809) |
| Age, years | ||||
| < 2 | 4.7 (4/86) | 11.1 (4/36) | 1.1 (1/95) | 8.3 (19/229) |
| 2–4 | 12.1 (18/149) | 9.3 (4/43) | 2.2 (1/46) | 30.2 (54/179) |
| 5–14 | 9.9 (23/233) | 3.6 (5/138) | 3.8 (5/130) | 8.5 (18/212) |
| 15–29 | 13.0 (13/100) | 1.4 (1/70) | 4.5 (1/22) | 3.8 (2/53) |
| 30–44 | 18.5 (15/81) | 4.2 (3/71) | 20.0 (1/5) | 0 (0/32) |
| > 45 | 25.7 (18/70) | 2.0 (2/99) | 9.1 (1/11) | 0 (0/104) |
| Sex | ||||
| M | 11.2 (50/446) | 3.8 (11/292) | 3.8 (8/210) | 10.4 (52/498) |
| F | 15.0 (41/273) | 4.8 (8/165) | 2.0 (2/99) | 13.2 (41/311) |
| Place of residence | ||||
| Residents | 8.3 (31/372) | 4.4 (18/413) | 0.6 (1/154) | 11.2 (89/792) |
| Non-residents | 17.3 (60/373) | 2.3 (1/44) | 5.8 (9/155) | 23.5 (4/17) |
| JE Incidence in residents/year/100,000 | ||||
| Crude | 0.24 | 0.22 | 0.01 | 1.53 |
| Adjusted† | 0.71 | 0.48 | 0.08 | 1.58 |
*
JEV = Japanese encephalitis virus.
†
Adjusted rate is calculated based on JE positivity among resident cases by age and seasonality applied to all non-tested cases assuming that the subset tested is a representative sample of acute meningitis and encephalitis syndrome cases and the homogenous rate of infection within a given prefecture (age group, time period stratum).