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Table 3 Presumptive diagnosis and serological evidence of acute dengue

From: Dengue as a cause of acute undifferentiated fever in Vietnam

Presumptive clinical diagnosis

Number of cases

Serological evidence of acute dengue

P value

  

No positive (%)

OR*

95% CI

 

Total

697

234 (33.6)

   

Dengue fever

45

22 (48.9)

1,985

1,082 – 3,643

0,027

Other

652

212 (30.4)

   

   Undifferentiated fever

387

137 (35.4)

1,203

0,876 – 1,654

0,254

   Pharyngitis

140

44 (31.4)

0,885

0,595 – 1,317

0,548

   Typhoid fever

36

12 (33.3)

0,989

0,485 – 2,014

0,975

   Tonsillitis

29

7 (24.1)

0,618

0,260 – 1,469

0,272

   Diarrhoea

27

6 (22.2)

0,554

0,220 – 1,392

0,203

   Leptospirosis

9

1 (11.1)

0,244

0,030 – 1,963

0,151

   Hepatitis

7

3 (42.9)

1,490

0,331 – 6,714

0,601

   Acute respiratory tract infection

1

0 (0)

   

   Others

16

2 (12.5)

0,276

0,062 – 1,227

0,071

  1. * OR: odds ratio in logistic regression mode = (number of acute dengue/number of no acute dengue, among presumptive diagnosis)/(number of acute dengue/number of no acute dengue, among all other diagnoses)