Table 5. Incidence rates (IR) per 1,000 person-years of arbovirus confirmed symptomatic infections in the cohort in Yucatan, Mexico by age, gender, and city.
Person-years at risk (N) | Dengue | IR (95%CI) | Chikungunya | IR (95%CI) | Zika | IR (95%CI) | |
---|---|---|---|---|---|---|---|
All participants | 3430.9 (3400) | 12 | 3.5 (1.9, 5.9) | 30 | 8.6 (5.8, 12.3) | 8 | 2.3 (0.9, 4.5) |
Age groups (years) | |||||||
≤ 8 | 1001.4 (991) | 3 | 2.9 (0.6, 8.8) | 10 | 9.9 (4.8, 18.4) | 4 | 3.99 (1.1, 10.2) |
9–14 | 502.5 (484) | 1 | 1.9 (0.03, 11.1) | 4 | 7.9 (2.1, 20.4) | 2 | 3.9 (0.5, 14.4) |
15–19 | 145.3 (146) | 1 | 6.88 (0.1, 38.3) | 1 | 6.9 (0.1, 38.3) | 0 | 0) |
20–49 | 1490.1 (1456) | 7 | 4.7 (1.9, 9.7) | 11 | 7.4 (3.7, 13.2) | 2 | 1.3 (0.2, 4.9) |
≥ 50 | 291.5 (323) | 0 | 0 | 4 | 13.7 (3.7, 35.1) | 0 | 0 |
Gender | |||||||
Male | 1511.7 (1531) | 0 | 0 | 9 | 5.9 (5.8, 12.3) | 3 | 1.9 (0.4, 5.8) |
Female | 1919.2 (1869) | 12 | 6.3 (3.2,10.9) | 21 | 10.9 (6.8, 16.7) | 5 | 2.6 (0.8, 6.1) |
City | |||||||
Merida | 2164.3 (2021) | 9 | 4.2 (1.9, 7.9) | 18 | 8.3 (4.9, 13.1) | 2 | 0.9 (0.1, 3.3) |
Progreso | 601.8 (641) | 2 | 3.3 (0.4, 12.0) | 5 | 8.3 (2.7,19.3) | 1 | 1.7 (0.02, 2.3) |
Ticul | 682.9 (738) | 1 | 1.5 (0.02, 8.2) | 7 | 10.3 (4.1, 21.1) | 5 | 7.3 (2.4, 17.1) |