Table 1 Demographic and clinical characteristics of dengue-positive patients vs. non-dengue patients from the hospital-based fever surveillance established in Medellin, Colombia in 2012–2014
Characteristics | Dengue-positive (n = 155) | Non-dengue (n = 382) | p-value | Total (N = 537) |
|---|---|---|---|---|
Age group (years) | Â | Â | 0.286 | Â |
 1–4 | 33 (21.3) | 87 (22.8) |  | 120 (22.4) |
 5–9 | 26 (16.8) | 73 (19.1) |  | 99 (18.4) |
 10–24 | 42 (27.1) | 100 (26.2) |  | 142 (26.4) |
 25–44 | 31 (20.0) | 63 (16.5) |  | 94 (17.5) |
 45–65 | 23 (14.8) | 59 (15.5) |  | 82 (15.3) |
Female (%) | 89 (57.4) | 224 (58.6) | 0.795 | 313 (58.3) |
Mean days of fever since onset (SD) | 3.72 (1.75) | 3.35 (1.57) | 0.017 | 3.45 (1.63) |
Mean overall fever duration (SD) | 4.85 (2.39) | 4.48 (2.37) | 0.111 | 4.59 (2.38) |
Current fever at presentation | 38 (24.5) | 111 (29.1) | 0.287 | 149 (27.8) |
Temperature at enrollment | Â | Â | 0.287 | Â |
 Below 38°c | 117 (75.5) | 271 (70.9) |  | 388 (72.3) |
  ≥ 38°c | 38 (24.5) | 111 (29.1) |  | 149 (27.8) |
Fever duration prior to visit | Â | Â | 0.001 | Â |
 1–2 days | 47 (30.3) | 114 (29.8) |  | 161 (30.0) |
 3–4 days | 52 (33.6) | 183 (47.9) |  | 235 (43.8) |
 5–7 days | 56 (36.1) | 85 (22.3) |  | 141 (26.3) |
Prev. dengue infection (%) | 5 (3.2) | 15 (3.9) | 0.698 | 20 (3.7) |
YF vaccination (%) | 55 (35.5) | 183 (47.9) | 0.009 | 238 (44.3) |
IPD/OPD (%) | 10 (6.5)/ 145 (93.6) | 10 (2.6)/ 372 (97.4) | 0.034 | 20 (3.7)/ 517 (96.3) |
Clinical diagnosis | ||||
 Suspected dengue | 5 (3.2) | 7 (1.8) | 0.150 | 12 (2.2) |
 Undifferentiated fever | 146 (94.2) | 372 (97.4) |  | 518 (96.5) |
 Others | 4 (2.6) | 3 (0.8) |  | 7 (1.3) |
Presence of signs and symptoms (%) | ||||
 Retro-orbital pain | 72 (46.5) | 152 (39.8) | 0.156 | 224 (41.7) |
 Rash | 27 (17.4) | 43 (11.3) | 0.055 | 70 (13.0) |
 Muscle pain | 90 (58.1) | 213 (55.8) | 0.625 | 303 (56.4) |
 Joint pain | 93 (60.0) | 215 (56.3) | 0.430 | 308 (57.4) |
 Fatigue/weakness | 136 (87.7) | 342 (89.5) | 0.549 | 478 (89.0) |
 Headache | 125 (80.7) | 279 (73.0) | 0.064 | 404 (75.2) |
 Neck pain | 38 (24.5) | 86 (22.5) | 0.618 | 124 (23.1) |
 Ear pain | 25 (16.1) | 57 (14.9) | 0.724 | 82 (15.3) |
 Nasal congestion | 88 (56.8) | 220 (57.6) | 0.862 | 308 (57.4) |
 Rhinorrhea | 88 (56.8) | 214 (56.0) | 0.873 | 302 (56.2) |
 Sore Throat | 65 (41.9) | 176 (46.1) | 0.382 | 241 (44.9) |
 Cough | 92 (59.4) | 252 (66.0) | 0.148 | 344 (64.1) |
 Sputum production | 47 (30.3) | 131 (34.3) | 0.376 | 178 (33.2) |
 Difficulty of breathing | 20 (12.9) | 57 (14.9) | 0.545 | 77 (14.3) |
 Nausea & vomiting | 71 (45.8) | 200 (52.4) | 0.169 | 271 (50.5) |
 Diarrhea | 42 (27.1) | 97 (25.4) | 0.683 | 139 (25.9) |
 Abdominal pain | 68 (43.9) | 162 (42.4) | 0.756 | 230 (42.8) |
 Flushed face | 52 (33.6) | 103 (27.0) | 0.127 | 155 (28.9) |
 Gum bleeding | 5 (3.2) | 8 (2.1) | 0.440 | 13 (2.4) |
 Nose bleeding | 14 (9.0) | 46 (12.0) | 0.316 | 60 (11.2) |
 Flushed face | 52 (33.6) | 103 (27.0) | 0.127 | 155 (28.9) |