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Table 2 Exposure, signs and symptoms of febrile patients, presenting to a primary health care facility, with serologically confirmed acute primary dengue and secondary dengue and febrile patients without dengue.

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

 

Other febrile disease a

(n = 463)

Acute primary dengue b

(n = 32)

Acute secondary dengue c

(n = 202)

P value

Age (median, range)

24 (4 – 82)

19 (5 – 68)

23 (5 – 74)

0.013*

Sex, no. (%)

   

ns

   Male

288 (62.2)

19 (59.4)

134 (66.3)

 

   Female

175 (37.8)

13 (40.6)

68 (33.7)

 

Exposure factors, no. (%)

Waded through flooded terrain

61 (13.2)

4 (12.5)

34 (16.8)

0.003 c

Days of illness (median, range)

2 (0 – 10)

3 (1 – 10)

2 (0 – 11)

ns

Days of fever (median, range)

1 (0 – 9)

1 (0 – 10)

2 (0 – 11)

ns

Days in bed (median, range)

1 (0 – 8)

1 (0 – 7)

2 (0 – 9)

ns

Symptoms, no. (%)

Headache

446 (96.3)

27 (84.4)

198 (98.0)

0.012 b

Anorexia

387 (83.6)

24 (75.0)

161 (79.7)

ns

Myalgia

272 (58.7)

15 (46.9)

126 (62.4)

0.047 c

Sore throat

196 (42.3)

17 (53.1)

81 (40.1)

ns

Backache

160 (34.6)

10 (31.3)

61 (30.2)

ns

Nausea

151 (32.6)

8 (25.0)

53 (26.2)

ns

Cough

133 (28.7)

17 (53.1)

62 (30.7)

ns

Running nose

118 (25.5)

13 (40.6)

31 (15.3)

0.009 c

Arthralgia

67 (14.5)

5 (15.6)

25 (12.4)

0.038 b

Abdominal pain

66 (14.3)

7 (21.9)

33 (16.3)

0.005 c

Vomitus

63 (13.6)

5 (15.6)

24 (11.9)

ns

Diarrhoea

35 (7.6)

1 (3.1)

9 (4.5)

0.047 c

Findings at physical examination, no. (%)

Tender muscles on palpation

241 (52.1)

16 (50.0)

87 (43.1)

ns

Red pharynx

231 (49.9)

21 (65.6)

93 (46.0)

ns

Pallor

140 (30.2)

14 (43.8)

46 (22.8)

0.047 b

Rhinitis

104 (22.5)

14 (43.8)

31 (15.3)

ns

Abdominal tenderness

88 (19.0)

8 (25.0)

31 (15.3)

ns

Arthritis

67 (14.5)

5 (15.6)

25 (12.4)

ns

Dehydration

56 (12.1)

3 (9.4)

20 (9.9)

ns

Tender liver

33 (7.1)

0

11 (5.4)

ns

Conjunctivitis

27 (5.8)

3 (9.4)

13 (6.4)

ns

Tourniquet test (number of petechie/square inch >0; median; range)

n = 38

5.5 (2 – 70)

n = 1

2 (2)

n = 22

8 (1 – 55)

ns

  1. P value of multinomial logistic regression; (a): reference category for (b) and (c); ns: no significant
  2. * Kruskal Wallis Test