Table 4. Characteristics associated with serotypes, Kampong Cham province, Cambodia, 2006–2008.

	DENV-1	DENV-2	DENV-3	DENV-4	All confirmed cases	DENV-1 vs. -2		DENV-1 vs. -3		DENV-2 vs. -3
	n = 115	n = 58	n = 234	n = 16	n = 736	aOR**	p value	aOR	p value	aOR	p value
Duration of fever in days:
<4	31.3	43.1	28.2	56.3	18.5	ref.*		ref.		ref.
= 4	14.8	31.0	23.1	18.8	12.5	1.7	0.279	1.8	0.105	1.0	0.935
>4	53.9	25.9	48.7	25.0	26.5	0.4	0.050	1.2	0.588	2.7	0.011
Patient outcomes (%)
Hospitalized	7.8	0.0	14.5	12.4	10.8			3.1	0.045
Non-inpatient care∧	54.8	41.4	38.6	31.3	42.8
Did not seek care	37.4	58.6	46.9	56.3	42.4
Age distribution in years (%)
0–4	30.4	25.9	37.2	18.8	33.1	ref.		ref.		ref.
5–9	41.7	36.2	41.5	50.0	41.1	1.0	0.982	0.8	0.508	0.8	0.522
10–14	24.3	34.5	17.1	18.8	21.5	1.9	0.187	0.7	0.299	0.4	0.009
≥15	3.5	3.4	4.3	12.5†	4.3	1.7	0.512	1.0	0.980	1.1	0.935

*ref.  =  reference group;

**aOR  =  adjusted Odds Ratio using logistic regression model, which included age, fever duration and patient outcomes as independent variables.

∧ pharmacy, outpatient clinic, etc.

†: DENV-4 was not significantly more frequent in the 15–19 age group compared with other serotypes (p>0.30).