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 |