Table 1.
Characteristics of suspected WNV cases categorized by final laboratory results
| Characteristics | All reported cases (N = 282) | Laboratory-positive dengue cases (N = 115) | Laboratory-negative cases (N = 32) | Indeterminate cases (N = 86) | Undifferentiated cases (N = 27) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | No. | % | No. | % | |
| Median age* (years) | 22 | 22 | 42 | 22 | 13 | |||||
| Age range | 4 months to 79 years | 4 months to 72 years | 5–72 years | 10–79 years | 4 months to 68 years | |||||
| Female | 141 | 50.0 | 55 | 47.8 | 18 | 56.2 | 42 | 48.8 | 12 | 44.4 |
| Residence | ||||||||||
| Ceiba | 30 | 10.6 | 7 | 6.2 | 1 | 3.1 | 15 | 17.4 | 1 | 3.7 |
| Fajardo | 125 | 44.3 | 48 | 42.4 | 11 | 34.4 | 43 | 50.0 | 7 | 25.9 |
| Humacao | 42 | 15.3 | 23 | 20.4 | 3 | 9.4 | 9 | 10.5 | 7 | 25.9 |
| Naguabo | 85 | 30.1 | 35 | 31.0 | 17 | 53.1 | 19 | 22.1 | 12 | 44.4 |
*
Statistically significant difference between laboratory-positive dengue cases and undifferentiated cases (χ2 test, P < 0.01).