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Table 2 Symptoms/signs and laboratory characteristics of patients with influenza, dengue, and other febrile illnesses

From: Use of simple clinical and laboratory predictors to differentiate influenza from dengue and other febrile illnesses in the emergency room

Variable Influenza (n = 526) Dengue (n = 148) Other febrile illnesses (n = 175) P a P b
Symptom/signc (n [%])      
Rhinorrhea 333 (63.3) 0 73 (41.7) <0.001 <0.001
Cough 356 (67.6) 38 (25.7) 112 (64) <0.001 0.396
Sore throat 207 (39.3) 24 (16.2) 43 (24.6) <0.001 <0.001
Malaise 183 (34.8) 95 (64.2) 21 (12) <0.001 <0.001
Headache 149 (28.3) 62 (41.9) 33 (18.9) 0.001 0.015
Vomiting/nausea 116 (22.1) 43 (29.1) 37 (21.1) 0.076 0.801
Diarrhea 57 (10.8) 15 (10.1) 26 (14.9) 0.807 0.154
Abdominal pain 40 (7.6) 31 (20.9) 18 (10.3) <0.001 0.265
Joint pain 26 (4.9) 74 (50) 10 (5.7) <0.001 0.539
Orbital pain 0 17 (11.5) 2 (1.1) <0.001 0.062
Rashes 5 (0.9) 88 (59.5) 0 <0.001 0.196
Dyspnea 41 (7.8) 3 (2) 1 (0.6) 0.008 <0.001
Drowsiness 13 (2.5) 0 0 0.083 0.036
Seizures 8 (1.5) 0 0 0.211 0.211
Laboratory characteristics      
Leukopenia (WBC <3.0 × 109 cells/L) (n/N [%]) 9/283 (3.2) 82/146 (56) 4/152 (2.6) <0.001 0.749
Platelet count 149-100 × 109 cells/L (n/N [%]) 38/238 (15.9) 27/146 (18.5) 5/133 (3.7) 0.522 0.003
Platelet count <100 × 109 cells/L (n/N [%]) 7/238 (2.9) 109/146 (74.6) 3/133 (2.3) <0.001 0.696
  1. WBC = white blood cell count; n/N = number of patients/total number of patients with data available.
  2. aInfluenza vs. dengue.
  3. bInfluenza vs. other febrile illnesses.
  4. cAn individual patient might have more than one symptom/sign.