Table 1.

Relevant clinical and laboratory data at hospital presentation and within seven days of dengue diagnosis

	No.(%) of patients at presentation	No.(%) of patients within seven days of positive dengue	p*
WHO 1997 criteria for probable dengue
Fever/temperature ≥37.5°C plus two or more of the following:	4 (14.3)	9 (32.1)	0.205
Fever:
Fever symptom	21 (75.0)	25 (89.3)	0.296
Temperature ≥37.5°C	19 (67.9)	25 (89.3)	0.101
Symptom/temperature ≥37.5°C	24 (85.7)	27 (96.4)	0.352
Headache	3 (10.7)	4 (14.3)	1.000
Retro-orbital pain	0 (0.0)	0 (0.0)	na
Myalgia	7 (25.0)	9 (32.1)	0.768
Arthralgia	0 (0.0)	2 (7.1)	0.491
Rash	1 (3.6)	3 (10.7)	0.611
Hemorrhagic manifestation	5 (17.9)	6 (21.4)	1.000
Leukopenia	6 (21.4)	11 (39.3)	0.245
WHO 2009 criteria for probable dengue
Fever symptom/temperature ≥37.5°C and two of the following:	17 (60.7)	22 (78.6)	0.245
Fever symptom/temperature ≥37.5°C	24 (85.7)	27 (96.4)	0.352
Nausea or vomiting	10 (35.7)	10 (35.7)	na
Rash	1 (3.6)	3 (10.7)	0.611
Aches and pain	18 (64.3)	19 (67.9)	1.000
Leukopenia	6 (21.4)	11 (39.3)	0.611
Any warning sign	19 (67.9)	27 (96.4)	0.012
WHO 2009 criteria for warning signs
Abdominal pain or tenderness	9 (32.1)	10 (35.7)	1.000
Persistent vomiting ≥2 days	0 (0.0)	2 (7.1)	0.491
Clinical fluid accumulation	2 (7.1)	13 (46.4)	0.002
Mucosal bleeding	0 (0.0)	4 (14.3)	0.112
Lethargy	11 (39.3)	16 (57.1)	0.285
Hepatomegaly	2 (7.1)	2 (7.1)	na
Hematocrit change ≥20%	9 (32.1)	25 (89.3)	<0.001
Hematocrit change ≥20% with platelet <50 × 10^9/L	1 (3.6)	20 (71.4)	<0.001
Hematocrit change ≥20% with platelet <20 × 10^9/L	1 (3.6)	14 (50.0)	<0.001
Any warning sign	19 (67.9)	27 (96.4)	0.012

na = not applicable, WHO = World Health Organization

*Fisher's exact test