Table 2.
Symptoms most commonly reported among symptomatic cases during the 2016 Zika outbreak in Grenada, showing the odds ratio for testing positive or negative with rash as statistically highly significant (∗∗p < 0.001) and the odds ratio for lymphadenopathy as statistically significant (∗p < 0.05).
| Symptom indicative of testing positive for ZIKV | ZIKV-positive cases (proportion of 191) | ZIKV-negative cases (proportion of 233) | Odds ratio (95% CI) |
|---|---|---|---|
| Rash∗∗ | 154 (81%) | 150 (64%) | 2.4 (1.5 to 3.7)∗∗ |
| Lymphadenopathy∗ | 38 (20%) | 30 (13%) | 1.7 (1.0 to 2.9)∗ |
| Nausea/vomiting | 38 (20%) | 32 (14%) | 1.6 (0.9 to 2.6) |
| Diarrhea | 26 (14%) | 28 (12%) | 1.2 (0.7 to 2.1) |
| Fever | 112 (59%) | 137 (59%) | 1.0 (0.7 to 1.5) |
| Headache | 74 (38%) | 92 (40%) | 1.0 (0.7 to 1.4) |
| Chills | 48 (25%) | 58 (25%) | 1.0 (0.7 to 1.6) |
| Eye pain | 67 (35%) | 86 (37%) | 0.9 (0.6 to 1.4) |
| Body pain | 68 (36%) | 98 (42%) | 0.8 (0.5 to 1.1) |
| Joint pain | 97 (51%) | 144 (62%) | 0.6 (0.4 to 1.0) |