Table 1.
Baseline Characteristics of Study Participants Across Illness Categories
| Overall | Healthy Control | Nonfebrile DENV | OFI | Apparent DENV | ||
|---|---|---|---|---|---|---|
| Characteristic, n (%) | n = 142 | Fever−/ DENV− n = 57 | Fever−/ DENV+ n = 18 | Fever+/ DENV− n = 14 | Fever+/ DENV+ n = 53 | P Value a |
| Age (years) | ||||||
| <19 | 49 (34.5) | 12 (21.1) | 3 (16.7) | 8 (57.1) | 26 (49.1) | .002 |
| ≥19 | 93 (65.5) | 45 (78.9) | 15 (83.3) | 6 (42.9) | 27 (50.9) | |
| Sex | ||||||
| Male | 76 (53.5) | 30 (52.6) | 5 (27.8) | 8 (57.1) | 33 (62.3) | .09 |
| Female | 66 (46.5) | 27 (47.4) | 13 (72.2) | 6 (42.9) | 20 (37.7) | |
| Recruitment | ||||||
| Index Case | 59 (41.5) | 0 (0.0) | 2 (11.1) | 11 (78.6) | 46 (86.8) | <.0001 |
| Associate | 83 (58.5) | 57 (100.0) | 16 (88.9) | 3 (21.4) | 7 (13.2) | |
| History of DENV infection | ||||||
| Participant (ever) | 24 (17.3) | 9 (16.4) | 3 (16.7) | 3 (23.1) | 9 (17.0) | .93 |
| Participant household member (within 4 weeks) | 33 (23.7) | 16 (28.6) | 6 (33.3) | 2 (15.4) | 9 (17.3) | .35 |
| Medical History | ||||||
| Allergies | 37 (26.2) | 13 (22.8) | 4 (22.2) | 6 (42.9) | 14 (26.9) | .48 |
| Hypertension | 8 (5.6) | 3 (5.3) | 3 (16.7) | 0 (0.0) | 2 (3.8) | .19 |
| Asthma | 6 (4.2) | 2 (3.5) | 1 (5.6) | 0 (0.0) | 3 (5.7) | .86 |
| Cancer | 3 (2.1) | 2 (3.5) | 0 (0.0) | 0 (0.0) | 1 (1.9) | 1.00 |
| Diabetes | 4 (2.8) | 1 (1.8) | 2 (11.1) | 0 (0.0) | 1 (1.9) | .29 |
Abbreviations: DENV, dengue virus; OFI, other febrile illness.
a P values are from Fisher’s exact test for categorical data comparisons.