Table 3. Association of CHIKV seroprevalence rate with age, region, gender, and health status (N = 1,544).
Univariable analysis | Multivariable analysis | |||||
---|---|---|---|---|---|---|
Variable | Number | IgG and/or IgM positive (%) | cOR* (95% CI) | p-value | aOR* (95% CI) | p-value |
Age (years) | ||||||
≤5 | 268 | 23.9 | Ref. | Ref. | ||
6–15 | 701 | 29.2 | 1.3 (0.9–1.8) | 0.096 | 1.7 (1.2–2.4) | 0.004 |
16–45 | 554 | 44.4 | 2.5 (1.8–3.5) | <0.0001 |
1.9 (1.0–3.8) |
0.05 |
≥46 | 21 | 85.7 | 19.1 (5.5–67.0) | <0.0001 | 13.4 (3.3–54.7) | <0.0001 |
Region | ||||||
Mandalay | 927 | 26.2 | Ref. | Ref. | ||
Myeik | 104 | 42.3 | 2.1 (1.4–3.1) | 0.001 | 1.9 (1.2–3.0) | 0.003 |
Yangon | 513 | 47.9 | 2.6 (2.1–3.3) | <0.001 | 2.4 (1.3–4.2) | 0.004 |
Gender | ||||||
Female | 602 | 31.9 | Ref. | Ref. | ||
Male | 942 | 36.2 | 1.2 (1.0–1.5) | 0.083 | 1.0 (0.8–1.3) | 0.8 |
Health status | ||||||
Healthy volunteers | 934 | 37.3 | Ref. | Ref. | ||
Febrile patients | 610 | 30.3 | 1.4 (1.1–1.6) | 0.005 | 1.5 (1.1–2.1) | 0.02 |
CHIKV: Chikungunya virus; cOR: crude odds ratio; aOR: adjusted odds ratio; CI: confidence interval. Seroprevalence rate includes both IgG and IgM positive results.