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. 2021 Dec 1;15(12):e0009961. doi: 10.1371/journal.pntd.0009961

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.