Table 4. Association of the anti-CHIKV NAbs with age, region, gender, and health status (N = 1,544).

			Univariable analysis		Multivariable analysis
Variable	Number	NAbs (%)	cOR*(95%CI)	p-value	aOR*(95%CI)	p-value
Age (years)
≤5	268	21.6	Ref.		Ref.
6–15	701	27.3	1.4 (1.0–1.9)	0.075	1.7 (1.2–2.6)	0.002
16–45	554	42.4	2.6(1.9–3.7)	<0.0001	2.1 (1.1–4.2)	0.03
≥46	21	85.7	21.7 (6.2–76.3)	<0.0001	16.1 (4.0–65.7)	0.0001
Region
Mandalay	927	24.3	Ref.		Ref.
Myeik	104	39.4	2.0 (1.3–3.1)	0.001	1.9 (1.2–2.9)	0.006
Yangon	513	46.0	2.7 (2.1–3.3)	<0.0001	2.4 (1.3–4.3)	0.004
Gender
Female	602	29.9	Ref.		Ref.
Male	942	34.2	1.2 (1.0–1.5)	0.08	1.0 (0.8–1.3)	0.8
Health status
Healthy volunteers	934	35.1	Ref.		Ref.
Febrile patients	610	28.5	0.7 (0.6–0.9)	0.007	1.6 (1.2–2.2)	0.005

NAbs: Neutralizing antibodies; cOR: crude odds ratio; aOR: adjusted odds ratio; CI: confidence interval.