Table. Univariate and multivariate regression analysis of CCHFV seropositivity in human population, Bulgaria* .
| Variable | No. (%) IgG positive, n = 28 | No. (%) IgG negative, n = 990 | Univariate analysis |
Multivariate analysis |
|||
|---|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | ||||
| Age, y | 1.00 (0.99–1.03) | 0.494 | |||||
| Median | 46 | 48 | |||||
| Range | 20–83 | 2–89 | |||||
| Sex | 0.456 | ||||||
| M | 16 (3.1) | 495 (96.9) | 1.33 (0.62–2.85) | ||||
| F | 12 (2.4) | 495 (97.9) | Ref | ||||
| Tick bite | <0.001 | <0.001 | |||||
| Yes | 15 (9.3) | 147 (90.7) | 6.62 (3.09–14.19) | 5.40 (2.47–11.84) | |||
| No | 13 (1.5) | 843 (98.5) | Ref | ||||
| Animal contact | 0.253 | ||||||
| Yes | 11 (3.7) | 290 (96.3) | 1.56 (0.72–3.38) | ||||
| No | 17 (2.4) | 700 (97.6) | Ref | ||||
| Farming | 0.001 | 0.012 | |||||
| Yes | 13 (6.7) | 182 (93.3) | 3.85 (1.80–8.23) | 2.76 (1.25–6.08) | |||
| No | 15 (1.8) | 808 (98.2) | Ref | ||||
*CCHFV, Congo-Crimean hemorrhagic fever; OR, odds ratio; Ref, reference.