Table 2.
Logistic regression model of risk factors associated with dengue seropositivity in Yucatan, Mexico
| Variables | Total (N = 1,667) | Seropositives (N = 1,227) | Seronegatives (N = 440) | Odds ratio | 95% CI |
|---|---|---|---|---|---|
| Age (years) | |||||
| < 8 | 241 (14.5) | 124 (10.1) | 117 (26.6) | Ref | Ref |
| 9–14 | 275 (16.5) | 198 (16.1) | 77 (17.5) | 2.43 | 1.69–3.50 |
| 15–19 | 285 (17.0) | 209 (17.0) | 76 (17.2) | 2.59 | 1.81–3.75 |
| 20–49 | 655 (39.3) | 520 (42.4) | 135 (30.7) | 2.63 | 2.65–4.99 |
| 50+ | 211 (12.7) | 176 (14.3) | 35 (8.0) | 4.74 | 3.08–7.46 |
| Sex | |||||
| Male | 632 (37.9) | 445 (36.3) | 184 (42.0) | Ref | Ref |
| Female | 1,035 (62.1) | 781 (63.7) | 254 (58.0) | 1.27 | 1.02–1.59 |
| City | |||||
| Merida | 700 (42.0) | 480 (39.1) | 220 (50.0) | Ref | Ref |
| Progreso | 469 (28.1) | 322 (26.2) | 147 (33.4) | 1.01 | 0.78–1.29 |
| Ticul | 498 (29.9) | 425 (34.7) | 73 (16.6) | 2.67 | 1.99–3.60 |
| Born in Yucatan | |||||
| No | 116 (6.9) | 77 (6.3) | 39 (8.9) | Ref | Ref |
| Yes | 1,551 (93.1) | 1,150 (93.7) | 401 (91.1) | 1.45 | 0.96–2.16 |
| History of previous dengue | |||||
| No | 1,581 (94.9) | 1,163 (94.8) | 418 (95.2) | Ref | Ref |
| Yes | 86 (5.1) | 64 (5.2) | 21 (4.8) | 1.09 | 0.67–1.86 |
| Previous confirmation of dengue | |||||
| No | 1,620 (97.2) | 1,190 (97.0) | 428 (97.3) | Ref | Ref |
| Yes | 47 (2.8) | 37 (3.0) | 12 (2.7) | 1.25 | 0.64–2.70 |
CI = confidence interval.