Table 1.

Demographic characteristics of the study population (N = 3,145). SINV NT: Sindbis virus Neutralization

		N Tested		ELISA			SINV NT
				Seropositive		p-value*	Seropositive		p-value*
		N	%	N	%		N	%
Total		3145	100	113	3.6		59	1.9
Collection Year	2011	777	24.71	31	3.99	0.4632	18	2.32	0.7177
	2012	814	25.88	27	3.32		14	1.72
	2013	785	24.96	33	4.2		15	1.91
	2014	769	24.45	22	2.86		12	1.56
Age Group (years)	0–4	460	14.63	13	2.83	<0.0001	3	0.65	<.0001
	5–9	426	13.55	12	2.82		7	1.64
	10–14	432	13.74	10	2.31		3	0.69
	15–29	509	16.18	8	1.57		6	1.18
	30–54	476	15.14	19	3.99		14	2.94
	55–64	388	12.34	15	3.87		6	1.55
	65–74	246	7.82	24	9.76		17	6.91
	75+	208	6.61	12	5.77		3	1.44
Gender	Male	1623	51.61	54	3.33	0.4081	25	1.54	0.1520
	Female	1522	48.39	59	3.88		34	2.23
Birth Country	Other	615	19.56	30	4.88	0.0565	15	2.44	0.2518
	Israel	2529	80.44	83	3.28		44	1.74
Population group	Jews and Others	2591	82.52	92	3.55	0.7539	44	1.7	0.1050
	Arabs	549	17.48	21	3.83		15	2.73
Residence Type	Rural	644	20.48	25	3.88	0.6586	20	3.11	0.0099
	Urban	2501	79.52	88	3.52		39	1.56
Socioeconomic status	Low	1642	67.54	55	3.35	0.3802	26	1.58	0.9074
	High	789	32.46	32	4.06		12	1.52
Residence Area	South	1095	34.82	44	4.02	0.0297	14	1.28	0.0021
	Central	253	8.04	14	5.53		5	1.98
	North	1047	33.29	42	4.01		34	3.25
	Haifa	193	6.14	2	1.04		0	0
	Jerusalem	389	12.37	6	1.54		5	1.29
	Tel-Aviv	168	5.34	5	2.98		1	0.6
Number of years lived in Israel (years)	0–9	900	30.29	27	3.00	<0.0001	10	1.11	0.0001
	10–19	673	22.65	12	1.78		5	0.74
	20–29	302	10.16	9	2.98		5	1.66
	30–39	205	6.9	6	2.93		6	2.93
	40–49	187	6.29	7	3.74		3	1.6
	50–59	274	9.22	12	4.38		6	2.19
	≥60	430	14.47	35	8.14		20	4.65

* p-value represents significance of seropositivity between strata within each demographic characteristic.