Table 3.
Univariate analysis of socioeconomic risk factors and dengue infection
| Total number of subjects* | Past dengue infection | Recent dengue infection | |||||||
|---|---|---|---|---|---|---|---|---|---|
| n (%) | Crude OR | 95% Confidence interval | P value | n (%) | Crude OR | 95% Confidence interval | P value | ||
| Type of housing (N = 2,001) | |||||||||
| House/apartment/other | 1,977 | 1,526 (77.2) | 1 | − | − | 199 (10.1) | 1 | − | − |
| Rancho† (shack) | 24 | 23 (95.8) | 6.80 | 0.92–50.47 | 0.061‡ | 2 (8.3) | 0.81 | 0.19–3.48 | 0.779 |
| Number of household rooms (N = 1,967) | |||||||||
| 1–4 | 533 | 408 (76.6) | 1 | − | − | 66 (12.4) | 1 | − | − |
| ≥ 5 | 1,434 | 1,118 (77.9) | 1.08 | 0.86–1.37 | 0.503 | 132 (9.2) | 0.72 | 0.52–0.98 | 0.038‡ |
| Number of persons per household (N = 1,906) | |||||||||
| 1–6 | 1,121 | 890 (79.4) | 1 | − | − | 118 (10.5) | 1 | − | − |
| ≥ 7 | 785 | 592 (75.4) | 0.80 | 0.64–0.99 | 0.040 | 75 (9.6) | 0.90 | 0.66–1.22 | 0.489 |
| Crowding (people/room; N = 1,893) | |||||||||
| 0.17–1.49 | 1,319 | 1,027 (77.9) | 1 | 121 (9.2) | 1 | − | − | ||
| 1.5–8.0 | 574 | 446 (77.7) | 0.99 | 0.78–1.25 | 0.938 | 70 (12.2) | 1.38 | 1.01–1.88 | 0.046‡ |
| Duration of residence (years; N = 1,948) | |||||||||
| 0–16 | 1,475 | 1,067 (72.3) | 1 | − | − | 136 (9.2) | 1 | − | − |
| ≥ 17 | 473 | 444 (93.9) | 1.56 | 1.41–1.72 | < 0.001 | 60 (12.7) | 1.09 | 1.01–1.19 | 0.030 |
| People who did not study or work§ (N = 2,002) | |||||||||
| No | 1,708 | 1,283 (75.1) | 1 | − | − | 164 (9.6) | 1 | − | − |
| Yes | 294 | 267 (90.8) | 3.28 | 2.17–4.94 | < 0.001 | 37 (12.6) | 1.36 | 0.93–1.98 | 0.117 |
| People following any type of study§ (N = 2,000) | |||||||||
| No | 620 | 569 (91.8) | 1 | − | − | 59 (9.5) | 1 | − | − |
| Yes | 1,380 | 979 (70.9) | 0.22 | 0.16–0.30 | < 0.001‡ | 142 (10.3) | 1.09 | 0.79–1.50 | 0.595 |
| People who had a job§ (N = 2,000) | |||||||||
| No | 1,525 | 1,115 (73.1) | 1 | − | − | 167 (11.0) | 1 | − | − |
| Yes | 475 | 433 (91.2) | 3.79 | 2.71–5.31 | < 0.001 | 34 (7.2) | 0.63 | 0.43–0.92 | 0.017‡ |
*
Total number of subjects is the denominator for each variable category. The univariate analysis for the two outcome variables is presented as in Table 2.
†
In Venezuela, the word rancho is used to define a shack or informal housing typical of slum areas.
‡
P values that remained or became significant after adjusting by age group (in the text).
§
At the time of interview.