Table 1. Seroprevalence of anti-CHIKV IgG antibody.

Characteristics	Total	Seropositive (%)	Crude OR (95% CI)	p value
Gender
Male	399	104 (26.1)	-	-
Female	436	120 (27.5)	1.1 (0.8–1.5)	0.635
Age
<15	232	24 (10.3)	-	-
15–30	180	17 (9.4)	0.9 (0.5–1.7)	0.762
31–45	217	69 (31.8)	4 (2.4–6.7)	<0.001*
>45	206	114 (55.3)	10.7 (6.5–17.8)	<0.001*
Region
Central	429	104 (24.2)	-	-
South	406	120 (29.6)	1.3 (1.0–1.8)	0.084

* Denote statistical significance.