Table 1.

anti-dengue IgG antibody positivity and demographic information of asymptomatic saudi subjects attending primary health care centers.

VARIABLE		NO.	ANTI-DENGUE IgG		P-VALUE*	ODDS RATIO	(95% CI)
			POSITIVE	%
Total no. studied		1939	927	47.8	0.001 (Male > female)	1.374	(1.139–1.658)
Male**		656	348	53.0
Female		1280	577	45.1
Age (years)
<11		11	3	27.3	0.000 (compared to age < 11 y)
11–20		237	76	32.1		1.259	(0.325–4.878)
21–30		399	156	39.1		1.712	(0.447–6.552)
31–40		462	197	42.6		1.982	(0.519–7.568)
41–50		429	228	53.1		3.025	(0.792–11.557)
>50		366	244	66.7		5.333	(1.390–20.462)
District of health center
–Kilo 14		828	391	47.2	0.004 (Aziziah > other districts)	1.326	(1.093–1.607)
–Al-Montazaht		204	101	49.5
–Al-Amir abdulmajeed		52	17	32.7
–Al-Aziziah		591	312	52.8
–Al-Matar algadeem		148	65	43.9
–Al-Bawadi		11 6	41	35.3
Type of housing
Villa		61	15	24.6	0.004 (compared to villa)
Apartment		1177	567	48.2		2.795	(1.569–4.978)
Communal housing		581	292	50.3		3.052	(1.694–5.497)
Collective housing		49	26	53.1		3.391	(1.529–7.523)
Employment		422	208	49.3	0.227	NS
Non-employment		1214	557	46.0
Travel outside saudi Arabia	No	221	111	50.2	0.022 (did not travel > travelled	1.869	(1.092–3.198)
	Yes	77	27	35.0

Notes:

^*(Significance: P < 0.05).

^**Gender information missing for three patients.