Table 4.
Logistic regression and temporal trends analysis of arboviral cases, Iquitos, Peru, 1993–1999.
| Arboviral cases | Total cases | Periods | Average annual change† | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1993* | 1994 | 1995 | 1996 | 1997 | 1998 | (Oct. 93–Sept. 99) | |||
| % (N) | % (n) | % (n) | % (n) | % (n) | % (n) | % (n) | % | (95% Cl) | |
| Dengue | 14.6 (967) | 5.7 (15) | 25.2 (178) | 6.2 (29) | 2.7 (21) | 15.0 (382) | 18.5 (342) | 6.7§ | (1.5–12.1) |
| VEE | 2.5 (164) | 6.1 (16) | 0.4 (3) | 0.4 (2) | 1.2 (9) | 2.8 (70) | 3.5 (64) | 18.1§ | (4.3–33.6) |
| Oropouche | 1.0 (68) | 0 (0) | 0.6 (4) | 0.6 (3) | 0.9 (7) | 1.8 (47) | 0.4 (7) | 11.6 | (–7.1 to 34.1) |
| Mayaro | 0.4 (29) | 0 (0) | 0 (0) | 0.4 (2) | 0.8 (6) | 0.6 (15) | 0.3 (6) | 12.5 | (–15.5 to 46.9) |
| Malaria‡ | 22.9 (1108) | 11.3 (16) | 27.3 (50) | 38.9 (32) | 38.7 (115) | 25.8 (648) | 15.2 (247) | −12.1‖ | (–17.0 to −6.8) |
CI, confidence intervals; VEE, Venezuelan equine encephalitis virus.
*
Periods: 1993, Oct93-Sep94; 1994, Oct94-Sep95; 1995, Oct95-Sep96; 1996, Oct96-Sep97; 1997, Oct97-Sep98; 1998, Oct98-Sep99.
†
% Average annual change controlled for all demographic variables in the multiple logistic regression model.
‡
The number of febrile cases tested for malaria was 4844.
§
P < 0.05
‖
P < 0.001