TABLE 2.
Association between ZIKV or DENV IgM-positive results and patient characteristics
| Parameter | Frequencya | Odds ratio (95% CI) | P value |
|---|---|---|---|
| ZIKV IgM | |||
| Sample year | |||
| 1988–1999 | 4/51 (7.8) | Reference | |
| 2000–2004 | 10/173 (5.8) | 0.72 (0.22–2.40) | 0.594 |
| Season | |||
| Dry (Nov-May) | 8/137 (5.8) | Reference | |
| Rainy (Jun-Oct) | 6/87 (6.9) | 1.19 (0.40–3.57) | 0.750 |
| Temp, °C | |||
| 37.5–37.9 | 10/171 (5.9) | Reference | |
| 38.0–39.4 | 4/53 (7.6) | 1.31 (0.39–4.38) | 0.656 |
| Age, yr (range, 21–66) | 0.95 (0.88–1.02) | 0.143 | |
| HIV serology | |||
| Negative | 12/148 (8.1) | Reference | |
| Positive | 2/76 (2.6) | 0.31 (0.07–1.41) | 0.128 |
| DENV IgM | |||
| Sample yr | |||
| 1988–1999 | 5/51 (9.8) | Reference | |
| 2000–2004 | 7/173 (4.1) | 0.39 (0.12–1.28) | 0.120 |
| Season | |||
| Dry (Nov-May) | 9/137 (6.6) | Reference | |
| Rainy (Jun-Oct) | 3/87 (3.5) | 0.51 (0.13–1.93) | 0.320 |
| Temp, °C | |||
| 37.5–37.9 | 3/171 (1.8) | Reference | |
| 38.0–39.4 | 9/53 (17.0) | 11.45 (2.98–44.10) | <.001 |
| Age, yr (range, 21–66) | 0.99 (0.92–1.07) | 0.845 | |
| HIV serology | |||
| Negative | 6/148 (4.1) | Reference | |
| Positive | 69/76 (7.9) | 2.03 (0.63–6.52) | 0.235 |
a
Frequency data are number of cases positive for Zika virus by Zika virus-specific IgM or for dengue virus by dengue virus-specific IgM divided by total number of patients. Values in parentheses are percentages.