Table 3. Variables associated dengue virus infection among persons with febrile illness compared with non-dengue febrile illness, Kampong Cham province, Cambodia, 2006–2008.

	TOTAL		DENGUE		Non DENGUE		P value	RR**	95%CI**
	n = 6121	%	n = 736	%	n = 5385	%
Age in years
Mean	7.1	-	7.2	-	7	-	0.651
Median	7	-	7	-	7	-
Min–Max	0–19	-	0–19	-	0–19	-
Gender
Males	3,132	51.4	372	53.6	2,760	53.1	0.767
Duration of fever in days
Mean	3.80	-	4.41	-	3.71	-	<0.001
Median	4	-	4	-	4	-
Min–Max	0–20	-	0–18	-	0–20	-
Fever resulting in care seeking	1,701	27.2	388	52.7	1,313	23.8	<0.001	2.1	1.9–2.4
Care at:
Pharmacy	321	5.1	34	4.6	287	5.2	0.405	0.9	0.6–1.2
Health center	191	3.1	27	3.7	164	3.0	0.372	1.2	0.8–1.8
Private clinic	997	16.3	236	32.1	761	13.8	<0.001	2.2	1.9–2.6
Hospitalization	191	3.1	106	13.6	91	1.6	<0.001	8.0	6.0–10.8

**RR  =  risk ratio; 95% CI  =  confidence interval.