TABLE 2.
Seroprevalence in percentage and 95% CI by age, gender, and region (univariate analyses)
| Variable | Seroprevalencea
|
|||||
|---|---|---|---|---|---|---|
| Both sexes
|
Men
|
Women
|
||||
| No. positive/no. studied (%) | 95% CI | No. positive/no. studied (%) | 95% CI | No. positive/no. studied (%) | 95% CI | |
| All ages | ||||||
| Hanoi | 430/546 (78.8) | 75.1-82.0 | 180/231 (77.9) | 72.1-82.8 | 250/315 (79.4) | 74.6-83.5 |
| Hatay | 294/425 (69.2) | 64.6-73.4 | 128/197 (65.0) | 58.1-71.3 | 166/228 (72.8) | 66.7-78.2 |
| Both regions | 724/971 (74.6) | 71.7-77.2 | 308/428 (72.0) | 67.5-76.0 | 416/543 (76.6) | 72.9-80.0 |
| Age group (yr) | ||||||
| 0-4 | 10/30 (33.3) | 19.2-51.2 | 7/20 (35.0) | 18.1-56.7 | 3/10 (30.0) | 10.8-60.3 |
| 5-9 | 29/59 (49.2) | 36.8-61.6 | 13/30 (43.3) | 27.4-60.8 | 16/29 (55.2) | 37.5-71.6 |
| 10-14 | 36/52 (69.2) | 55.7-80.1 | 22/26 (84.6) | 66.5-93.9 | 14/26 (53.8) | 35.5-71.2 |
| 15-19 | 65/83 (78.3) | 68.3-85.8 | 38/49 (77.6) | 64.1-87.0 | 27/34 (79.4) | 63.2-89.7 |
| 20-24 | 100/138 (72.5) | 64.5-79.2 | 29/47 (61.7) | 47.4-74.2 | 71/91 (78.0) | 68.5-85.3 |
| 25-29 | 15/24 (62.5) | 42.7-78.8 | 3/8 (37.5) | 13.7-64.9 | 12/16 (75.0) | 50.5-89.8 |
| 30-34 | 37/43 (86.0) | 72.7-93.4 | 11/14 (78.6) | 52.4-92.4 | 26/29 (89.7) | 73.6-96.4 |
| 35-39 | 35/44 (79.5) | 65.5-88.8 | 6/6 (100) | 61.0-100.0 | 29/38 (76.3) | 60.8-87.0 |
| 40-44 | 73/89 (82.0) | 72.8-88.6 | 34/42 (81.0) | 66.7-90.0 | 39/47 (83.0) | 69.9-91.1 |
| 45-49 | 43/56 (76.8) | 64.2-85.9 | 21/26 (80.8) | 62.1-91.5 | 22/30 (73.3) | 55.6-85.8 |
| 50-54 | 53/65 (81.5) | 70.4-89.1 | 19/22 (86.4) | 66.7-95.3 | 34/43 (79.1) | 64.8-88.6 |
| 55-59 | 41/56 (73.2) | 60.4-83.0 | 18/27 (66.7) | 47.8-81.4 | 23/29 (79.3) | 61.6-90.2 |
| 60-64 | 55/70 (78.6) | 67.6-86.6 | 29/35 (82.9) | 67.3-91.9 | 26/35 (74.3) | 57.9-85.8 |
| 65-69 | 33/35 (94.3) | 81.4-98.4 | 15/16 (93.8) | 71.7-98.9 | 18/19 (94.7) | 75.4-99.1 |
| 70-74 | 58/77 (75.3) | 64.6-83.6 | 30/43 (69.8) | 54.9-81.4 | 28/34 (82.4) | 66.5-91.7 |
| 75-79 | 21/27 (77.8) | 59.2-89.4 | 8/10 (80.0) | 49.0-94.3 | 13/17 (76.5) | 52.7-90.4 |
| ≥80 | 12/14 (85.7) | 60.1-96.0 | 3/5 (60.0) | 23.1-88.2 | 9/9 (100.0) | 70.1-100.0 |
a
Proportion of infected individuals in a population, as determined by serology.